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| etrontech e m 6 3 6 3 2 7 e t r o n t e c h n o l o g y , i n c . 1 f , n o . 1 , p r o s p e r i t y r d . 1 , s c i e n c e - b a s e d i n d u s t r i a l p a r k , h s i n c h u , t a i w a n , r . o . c t e l : ( 8 8 6 ) - 3 - 5 7 8 2 3 4 5 f a x : ( 8 8 6 ) - 3 - 5 7 7 9 0 0 1 e t r o n t e c h n o l o g y , i n c . , r e s e r v e s t h e r i g h t t o m a k e c h a n g e s t o i t s p r o d u c t s a n d s p e c i f i c a t i o n s w i t h o u t n o t i c e . 5 1 2 k x 3 2 h i g h s p e e d s y n c h r o n o u s g r a p h i c s d r a m ( s g r a m ) p r e l i m i n a r y ( 1 2 / 9 8 ) f e a t u r e s f a s t a c c e s s t i m e f r o m c l o c k : 5 / 5 / 5 . 5 / 6 . 5 / 7 . 5 n s f a s t c l o c k r a t e : 1 8 3 / 1 6 6 / 1 4 3 / 1 2 5 / 1 0 0 m h z f u l l y s y n c h r o n o u s o p e r a t i o n i n t e r n a l p i p e l i n e d a r c h i t e c t u r e d u a l i n t e r n a l b a n k s ( 2 5 6 k x 3 2 - b i t x 2 - b a n k ) p r o g r a m m a b l e m o d e a n d s p e c i a l m o d e r e g i s t e r s - c a s # l a t e n c y : 1 , 2 , o r 3 - b u r s t l e n g t h : 1 , 2 , 4 , 8 , o r f u l l p a g e - b u r s t t y p e : i n t e r l e a v e d o r l i n e a r b u r s t - b u r s t - r e a d - s i n g l e - w r i t e - l o a d c o l o r o r m a s k r e g i s t e r b u r s t s t o p f u n c t i o n i n d i v i d u a l b y t e c o n t r o l l e d b y d q m 0 - 3 b l o c k w r i t e a n d w r i t e - p e r - b i t c a p a b i l i t y a u t o r e f r e s h a n d s e l f r e f r e s h 2 0 4 8 r e f r e s h c y c l e s / 3 2 m s s i n g l e + 3 . 3 v 0 . 3 v p o w e r s u p p l y i n t e r f a c e : l v t t l j e d e c 1 0 0 - p i n p l a s t i c p a c k a g e - q f p ( b o d y t h i c k n e s s = 2 . 8 m m ) - t q f p 1 . 4 ( b o d y t h i c k n e s s = 1 . 4 m m ) - t q f p 1 . 0 ( b o d y t h i c k n e s s = 1 . 0 m m ) o v e r v i e w k e y s p e c i f i c a t i o n s e m 6 3 6 3 2 7 - 5 5 / 6 / 7 / 8 / 1 0 t c k 3 c l o c k c y c l e t i m e ( m i n . ) 5 . 5 / 6 / 7 / 8 / 1 0 n s t r a s r o w a c t i v e t i m e ( m a x . ) 3 2 / 3 6 / 4 2 / 4 8 / 6 0 n s t a c 1 a c c e s s t i m e f r o m r e a d c o m m a n d 7 / 8 / 1 3 / 1 8 / 2 3 n s t a c 3 a c c e s s t i m e f r o m c l k ( m a x . ) 5 / 5 / 5 . 5 / 6 . 5 / 7 . 5 n s t r c r o w c y c l e t i m e ( m i n . ) 4 8 / 5 4 / 6 3 / 7 2 / 9 0 n s o r d e r i n g i n f o r m a t i o n p a r t n u m b e r f r e q u e n c y p a c k a g e e m 6 3 6 3 2 7 q - 1 0 1 0 0 m h z q f p e m 6 3 6 3 2 7 r - 1 0 1 0 0 m h z q f p ( r e v e r s e ) e m 6 3 6 3 2 7 t q - 1 0 1 0 0 m h z t q f p 1 . 4 e m 6 3 6 3 2 7 j t - 1 0 1 0 0 m h z t q f p 1 . 0 e m 6 3 6 3 2 7 q - 8 1 2 5 m h z q f p e m 6 3 6 3 2 7 r - 8 1 2 5 m h z q f p ( r e v e r s e ) e m 6 3 6 3 2 7 t q - 8 1 2 5 m h z t q f p 1 . 4 e m 6 3 6 3 2 7 j t - 8 1 2 5 m h z t q f p 1 . 0 e m 6 3 6 3 2 7 q - 7 1 4 3 m h z q f p e m 6 3 6 3 2 7 t q - 7 1 4 3 m h z t q f p 1 . 4 e m 6 3 6 3 2 7 q - 6 1 6 6 m h z q f p e m 6 3 6 3 2 7 t q - 6 1 6 6 m h z t q f p 1 . 4 e m 6 3 6 3 2 7 q - 5 5 1 8 3 m h z q f p e m 6 3 6 3 2 7 t q - 5 5 1 8 3 m h z t q f p 1 . 4 t h e e m 6 3 6 3 2 7 s g r a m i s a h i g h - s p e e d c m o s s y n c h r o n o u s g r a p h i c s d r a m c o n t a i n i n g 1 6 m b i t s . i t i s i n t e r n a l l y c o n f i g u r e d a s a d u a l 2 5 6 k x 3 2 d r a m w i t h a s y n c h r o n o u s i n t e r f a c e ( a l l s i g n a l s a r e r e g i s t e r e d o n t h e p o s i t i v e e d g e o f t h e c l o c k s i g n a l , c l k ) . e a c h o f t h e 2 5 6 k x 3 2 b i t b a n k s i s o r g a n i z e d a s 1 0 2 4 r o w s b y 2 5 6 c o l u m n s b y 3 2 b i t s . r e a d a n d w r i t e a c c e s s e s t o t h e s g r a m a r e b u r s t o r i e n t e d ; a c c e s s e s s t a r t a t a s e l e c t e d l o c a t i o n a n d c o n t i n u e f o r a p r o g r a m m e d n u m b e r o f l o c a t i o n s i n a p r o g r a m m e d s e q u e n c e . a c c e s s e s b e g i n w i t h t h e r e g i s t r a t i o n o f a b a n k a c t i v a t e c o m m a n d w h i c h i s t h e n f o l l o w e d b y a r e a d o r w r i t e c o m m a n d . t h e e m 6 3 6 3 2 7 p r o v i d e s f o r p r o g r a m m a b l e r e a d o r w r i t e b u r s t l e n g t h s o f 1 , 2 , 4 , 8 , o r f u l l p a g e , w i t h a b u r s t t e r m i n a t i o n o p t i o n . a n a u t o p r e c h a r g e f u n c t i o n m a y b e e n a b l e d t o p r o v i d e a s e l f - t i m e d r o w p r e c h a r g e t h a t i s i n i t i a t e d a t t h e e n d o f t h e b u r s t s e q u e n c e . t h e r e f r e s h f u n c t i o n s , e i t h e r a u t o o r s e l f r e f r e s h a r e e a s y t o u s e . i n a d d i t i o n , e m 6 3 6 3 2 7 f e a t u r e s t h e w r i t e - p e r - b i t a n d t h e m a s k e d b l o c k w r i t e f u n c t i o n s . b y h a v i n g a p r o g r a m m a b l e m o d e r e g i s t e r a n d s p e c i a l m o d e r e g i s t e r , t h e s y s t e m c a n c h o o s e t h e m o s t s u i t a b l e m o d e s t o m a x i m i z e i t s p e r f o r m a n c e . t h e s e d e v i c e s a r e w e l l s u i t e d f o r a p p l i c a t i o n s r e q u i r i n g h i g h m e m o r y b a n d w i d t h , a n d w h e n c o m b i n e d w i t h s p e c i a l g r a p h i c s f u n c t i o n s r e s u l t i n a d e v i c e p a r t i c u l a r l y w e l l s u i t e d t o h i g h p e r f o r m a n c e g r a p h i c s a p p l i c a t i o n s .
etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 d e c e m b e r 1 9 9 8 b l o c k d i a g r a m refresh coun ter co lu mn coun ter address buffer a 0 a 8 b s co n t r ol s i g n a l ge n er a t or dq s buffer d q m 0 ~ 3 col or r e g i s t e r m a s k r e g i s t e r clo ck buffer co m m a nd decoder column decoder sense amplifier row decoder 1024 x 256 x 32 cell array (bank #0) sense amplifier column decoder row decoder 1024 x 256 x 32 cell array (bank #1) m o d e r e g i s t e r cl k cke cs # ra s# ca s# we# a 9 dq 0 x d q 3 1 dsf s p e c i a l m o d e r e g i s t e r p i n a s s i g n m e n t ( t o p v i e w ) f o r w a r d t y p e r e v e r s e t y p e 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 8 0 7 9 7 8 7 7 7 6 7 5 7 4 7 3 7 2 7 1 7 0 6 9 6 8 6 7 6 6 6 5 6 4 6 3 6 2 6 1 6 0 5 9 5 8 5 7 5 6 5 5 5 4 5 3 5 2 5 1 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 8 9 9 0 9 1 9 2 9 3 9 4 9 5 9 6 9 7 9 8 9 9 1 0 0 5 0 4 9 4 8 4 7 4 6 4 5 4 4 4 3 4 2 4 1 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 3 3 2 3 1 dq 3 v d dq dq 4 dq 5 v ssq dq 6 dq 7 v d dq d q 1 6 d q 1 7 v ssq d q 1 8 d q 1 9 v d dq v d d v ss d q 2 0 d q 2 1 v ssq d q 2 2 d q 2 3 v d dq d q m 0 d q m 2 we# ca s# ra s# cs # b s a 8 d q 2 8 v d dq d q 2 7 d q 2 6 v ssq d q 2 5 d q 2 4 v d dq d q 1 5 d q 1 4 v ssq d q 1 3 d q 1 2 v d dq v ss v d d d q 1 1 d q 1 0 v ssq dq 9 dq 8 v d dq n c d q m 3 d q m 1 cl k cke dsf n c a 9 d q 2 9 v ssq d q 3 0 d q 3 1 v ss n c n c n c n c n c n c n c n c n c n c v d d dq 0 dq 1 v ssq dq 2 a 7 a 6 a 5 a 4 v ss n c n c n c n c n c n c n c n c n c n c v d d a 3 a 2 a 1 a 0 em636327q-xx 8 0 7 9 7 8 7 7 7 6 7 5 7 4 7 3 7 2 7 1 7 0 6 9 6 8 6 7 6 6 6 5 6 4 6 3 6 2 6 1 6 0 5 9 5 8 5 7 5 6 5 5 5 4 5 3 5 2 5 1 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 1 0 0 9 9 9 8 9 7 9 6 9 5 9 4 9 3 9 2 9 1 9 0 8 9 8 8 8 7 8 6 8 5 8 4 8 3 8 2 8 1 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 5 0 d q 2 8 v d dq d q 2 7 d q 2 6 v ssq d q 2 5 d q 2 4 v d dq d q 1 5 d q 1 4 v ssq d q 1 3 d q 1 2 v d dq v ss v d d d q 1 1 d q 1 0 v ssq dq 9 dq 8 v d dq n c d q m 3 d q m 1 cl k cke dsf n c a 9 dq 3 v d dq dq 4 dq 5 v ssq dq 6 dq 7 v d dq d q 1 6 d q 1 7 v ssq d q 1 8 d q 1 9 v d dq v d d v ss d q 2 0 d q 2 1 v ssq d q 2 2 d q 2 3 v d dq d q m 0 d q m 2 we# ca s# ra s# cs # b s a 8 dq 2 v ssq dq 1 dq 0 v d d n c n c n c n c n c n c n c n c n c n c v ss d q 3 1 d q 3 0 v ssq d q 2 9 a 0 a 1 a 2 a 3 v d d n c n c n c n c n c n c n c n c n c n c v ss a 4 a 5 a 6 a 7 em6363 27r-xx etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 d e c e m b e r 1 9 9 8 p i n d e s c r i p t i o n s t a b l e 1 s h o w s t h e d e t a i l s f o r p i n n u m b e r , s y m b o l , t y p e , a n d d e s c r i p t i o n . t a b l e 1 . p i n d e t a i l s o f e m 6 3 6 3 2 7 p i n n u m b e r s y m b o l t y p e d e s c r i p t i o n 5 5 c l k i n p u t c l o c k : c l k i s d r i v e n b y t h e s y s t e m c l o c k . a l l s g r a m i n p u t s i g n a l s a r e s a m p l e d o n t h e p o s i t i v e e d g e o f c l k . c l k a l s o i n c r e m e n t s t h e i n t e r n a l b u r s t c o u n t e r a n d c o n t r o l s t h e o u t p u t r e g i s t e r s . 5 4 c k e i n p u t c l o c k e n a b l e : c k e a c t i v a t e s ( h i g h ) a n d d e a c t i v a t e s ( l o w ) t h e c l k s i g n a l . i f c k e g o e s l o w s y n c h r o n o u s l y w i t h c l o c k ( s e t - u p a n d h o l d t i m e s a m e a s o t h e r i n p u t s ) , t h e i n t e r n a l c l o c k i s s u s p e n d e d f r o m t h e n e x t c l o c k c y c l e a n d t h e s t a t e o f o u t p u t a n d b u r s t a d d r e s s i s f r o z e n a s l o n g a s t h e c k e r e m a i n s l o w . w h e n b o t h b a n k s a r e i n t h e i d l e s t a t e , d e a c t i v a t i n g t h e c l o c k c o n t r o l s t h e e n t r y t o t h e p o w e r d o w n a n d s e l f r e f r e s h m o d e s . c k e i s s y n c h r o n o u s e x c e p t a f t e r t h e d e v i c e e n t e r s p o w e r d o w n a n d s e l f r e f r e s h m o d e s , w h e r e c k e b e c o m e s a s y n c h r o n o u s u n t i l e x i t i n g t h e s a m e m o d e . t h e i n p u t b u f f e r s , i n c l u d i n g c l k , a r e d i s a b l e d d u r i n g p o w e r d o w n a n d s e l f r e f r e s h m o d e s , p r o v i d i n g l o w s t a n d b y p o w e r . 2 9 b s i n p u t b a n k s e l e c t : b s d e f i n e s t o w h i c h b a n k t h e b a n k a c t i v a t e , r e a d , w r i t e , o r b a n k p r e c h a r g e c o m m a n d i s b e i n g a p p l i e d . b s i s a l s o u s e d t o p r o g r a m t h e 1 0 t h b i t o f t h e m o d e a n d s p e c i a l m o d e r e g i s t e r s . 3 1 - 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" t h e n , t h e r e a d o r w r i t e c o m m a n d i s s e l e c t e d b y a s s e r t i n g w e # " l o w " o r " h i g h . " 2 5 w e # i n p u t w r i t e e n a b l e : t h e w e # s i g n a l d e f i n e s t h e o p e r a t i o n c o m m a n d s i n c o n j u n c t i o n w i t h t h e r a s # a n d c a s # s i g n a l s a n d i s l a t c h e d a t t h e p o s i t i v e e d g e s o f c l k . t h e w e # i n p u t i s u s e d t o s e l e c t t h e b a n k a c t i v a t e o r p r e c h a r g e c o m m a n d a n d r e a d o r w r i t e c o m m a n d . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 d e c e m b e r 1 9 9 8 5 3 d s f i n p u t d e f i n e s p e c i a l f u n c t i o n : t h e d s f s i g n a l d e f i n e s t h e o p e r a t i o n c o m m a n d s i n c o n j u n c t i o n w i t h t h e r a s # a n d c a s # a n d w e # s i g n a l s a n d i s l a t c h e d a t t h e p o s i t i v e e d g e s o f c l k . t h e d s f i n p u t i s u s e d t o s e l e c t t h e m a s k e d w r i t e d i s a b l e / e n a b l e c o m m a n d a n d b l o c k w r i t e c o m m a n d , a n d t h e s p e c i a l m o d e r e g i s t e r s e t c y c l e . 2 3 , 5 6 , 2 4 , 5 7 d q m 0 - d q m 3 i n p u t d a t a i n p u t / o u t p u t m a s k : d q m 0 - d q m 3 a r e b y t e s p e c i f i c , n o n p e r s i s t e n t i / o b u f f e r c o n t r o l s . t h e i / o b u f f e r s a r e p l a c e d i n a h i g h - z s t a t e w h e n d q m i s s a m p l e d h i g h . i n p u t d a t a i s m a s k e d w h e n d q m i s s a m p l e d h i g h d u r i n g a w r i t e c y c l e . o u t p u t d a t a i s m a s k e d ( t w o - c l o c k l a t e n c y ) w h e n d q m i s s a m p l e d h i g h d u r i n g a r e a d c y c l e . d q m 3 m a s k s d q 3 1 - d q 2 4 , d q m 2 m a s k s d q 2 3 - d q 1 6 , d q m 1 m a s k s d q 1 5 - d q 8 , a n d d q m 0 m a s k s d q 7 - d q 0 . 9 7 , 9 8 , 1 0 0 , 1 , 3 , 4 , 6 , 7 , 6 0 , 6 1 , 6 3 , 6 4 , 6 8 , 6 9 , 7 1 , 7 2 , 9 , 1 0 , 1 2 , 1 3 , 1 7 , 1 8 , 2 0 , 2 1 , 7 4 , 7 5 , 7 7 , 7 8 , 8 0 , 8 1 , 8 3 , 8 4 d q 0 - d q 3 1 i n p u t / o u t p u t d a t a i / o : t h e d q 0 - 3 1 i n p u t a n d o u t p u t d a t a a r e s y n c h r o n i z e d w i t h t h e p o s i t i v e e d g e s o f c l k . t h e i / o s a r e b y t e - m a s k a b l e d u r i n g r e a d s a n d w r i t e s . t h e d q s a l s o s e r v e a s c o l u m n / b y t e m a s k i n p u t s d u r i n g b l o c k w r i t e s . 3 6 - 4 5 , 5 2 , 5 8 , 8 6 - 9 5 n c - n o c o n n e c t : t h e s e p i n s s h o u l d b e l e f t u n c o n n e c t e d . 2 , 8 , 1 4 , 2 2 , 5 9 , 6 7 , 7 3 , 7 9 v d d q s u p p l y d q p o w e r : p r o v i d e i s o l a t e d p o w e r t o d q s f o r i m p r o v e d n o i s e i m m u n i t y . 5 , 1 1 , 1 9 , 6 2 , 7 0 , 7 6 , 8 2 , 9 9 v s s q s u p p l y d q g r o u n d : p r o v i d e i s o l a t e d g r o u n d t o d q s f o r i m p r o v e d n o i s e i m m u n i t y . 1 5 , 3 5 , 6 5 , 9 6 v d d s u p p l y p o w e r s u p p l y : + 3 . 3 v 0 . 3 v 1 6 , 4 6 , 6 6 , 8 5 v s s s u p p l y g r o u n d etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 d e c e m b e r 1 9 9 8 o p e r a t i o n m o d e f u l l y s y n c h r o n o u s o p e r a t i o n s a r e p e r f o r m e d t o l a t c h t h e c o m m a n d s a t t h e p o s i t i v e e d g e s o f c l k . t a b l e 2 s h o w s t h e t r u t h t a b l e f o r t h e o p e r a t i o n c o m m a n d s . t a b l e 2 . t r u t h t a b l e ( n o t e ( 1 ) , ( 2 ) ) c o m m a n d s t a t e c k e n - 1 c k e n d q m ( 7 ) b s a 9 a 0 - 8 c s # r a s # c a s # w e # d s f b a n k a c t i v a t e & m a s k e d w r i t e d i s a b l e i d l e ( 3 ) h x x v v v l l h h l b a n k a c t i v a t e & m a s k e d w r i t e e n a b l e i d l e ( 3 ) h x x v v v l l h h h b a n k p r e c h a r g e a n y h x x v l x l l h l l p r e c h a r g e a l l a n y h x x x h x l l h l l w r i t e a c t i v e ( 3 ) h x x v l v l h l l l b l o c k w r i t e c o m m a n d a c t i v e ( 3 ) h x x v l v l h l l h w r i t e a n d a u t o p r e c h a r g e a c t i v e ( 3 ) h x x v h v l h l l l b l o c k w r i t e a n d a u t o p r e c h a r g e a c t i v e ( 3 ) h x x v h v l h l l h r e a d a c t i v e ( 3 ) h x x v l v l h l h l r e a d a n d a u t o p r e c h a r g e a c t i v e ( 3 ) h x x v h v l h l h l m o d e r e g i s t e r s e t i d l e h x x v l v l l l l l s p e c i a l m o d e r e g i s t e r s e t i d l e ( 5 ) h x x x x v l l l l h n o - o p e r a t i o n a n y h x x x x x l h h h x b u r s t s t o p a c t i v e ( 4 ) h x x x x x l h h l l d e v i c e d e s e l e c t a n y h x x x x x h x x x x a u t o r e f r e s h i d l e h h x x x x l l l h l s e l f r e f r e s h e n t r y i d l e h l x x x x l l l h l s e l f r e f r e s h e x i t i d l e l h x x x x h x x x x ( s e l f r e f r e s h ) l h h h x c l o c k s u s p e n d m o d e e n t r y a c t i v e h l x x x x x x x x x p o w e r d o w n m o d e e n t r y a n y ( 6 ) h l x x x x h x x x x l h h h l c l o c k s u s p e n d m o d e e x i t a c t i v e l h x x x x x x x x x p o w e r d o w n m o d e e x i t a n y l h x x x x h x x x x ( p o w e r d o w n ) l h h h l d a t a w r i t e / o u t p u t e n a b l e a c t i v e h x l x x x x x x x x d a t a m a s k / o u t p u t d i s a b l e a c t i v e h x h x x x x x x x x n o t e : 1 . v = v a l i d x = d o n ' t c a r e l = l o w l e v e l h = h i g h l e v e l 2 . c k e n s i g n a l i s i n p u t l e v e l w h e n c o m m a n d s a r e p r o v i d e d . c k e n - 1 s i g n a l i s i n p u t l e v e l o n e c l o c k c y c l e b e f o r e t h e c o m m a n d s a r e p r o v i d e d . 3 . t h e s e a r e s t a t e s o f b a n k d e s i g n a t e d b y b s s i g n a l . 4 . d e v i c e s t a t e i s 1 , 2 , 4 , 8 , a n d f u l l p a g e b u r s t o p e r a t i o n . 5 . t h e s p e c i a l m o d e r e g i s t e r s e t i s a l s o a v a i l a b l e i n r o w a c t i v e s t a t e . 6 . p o w e r d o w n m o d e c a n n o t e n t e r i n t h e b u r s t o p e r a t i o n . w h e n t h i s c o m m a n d i s a s s e r t e d i n t h e b u r s t c y c l e , d e v i c e s t a t e i s c l o c k s u s p e n d m o d e . 7 . d q m 0 - 3 etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 d e c e m b e r 1 9 9 8 c o m m a n d s 1 b a n k a c t i v a t e & m a s k e d w r i t e d i s a b l e c o m m a n d ( r a s # = " l " , c a s # = " h " , w e # = " h " , d s f = " l " , b s = b a n k , a 0 - a 9 = r o w a d d r e s s ) t h e b a n k a c t i v a t e c o m m a n d a c t i v a t e s t h e i d l e b a n k d e s i g n a t e d b y t h e b s ( b a n k s e l e c t ) s i g n a l . b y l a t c h i n g t h e r o w a d d r e s s o n a 0 t o a 9 a t t h e t i m e o f t h i s c o m m a n d , t h e s e l e c t e d r o w a c c e s s i s i n i t i a t e d . t h e r e a d o r w r i t e o p e r a t i o n i n t h e s a m e b a n k c a n o c c u r a f t e r a t i m e d e l a y o f t r c d ( m i n . ) f r o m t h e t i m e o f b a n k a c t i v a t i o n . a s u b s e q u e n t b a n k a c t i v a t e c o m m a n d t o a d i f f e r e n t r o w i n t h e s a m e b a n k c a n o n l y b e i s s u e d a f t e r t h e p r e v i o u s a c t i v e r o w h a s b e e n p r e c h a r g e d ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . t h e m i n i m u m t i m e i n t e r v a l b e t w e e n s u c c e s s i v e b a n k a c t i v a t e c o m m a n d s t o t h e s a m e b a n k i s d e f i n e d b y t r c ( m i n . ) . t h e s g r a m h a s t w o i n t e r n a l b a n k s o n t h e s a m e c h i p a n d s h a r e s p a r t o f t h e i n t e r n a l c i r c u i t r y t o r e d u c e c h i p a r e a ; t h e r e f o r e i t r e s t r i c t s t h e b a c k - t o - b a c k a c t i v a t i o n o f b o t h b a n k s . t r r d ( m i n . ) s p e c i f i e s t h e m i n i m u m t i m e r e q u i r e d b e t w e e n a c t i v a t i n g d i f f e r e n t b a n k s . a f t e r t h i s c o m m a n d i s u s e d , t h e w r i t e c o m m a n d a n d t h e b l o c k w r i t e c o m m a n d p e r f o r m t h e n o m a s k w r i t e o p e r a t i o n . cl k addr ess t0 t 1 t2 t3 t n + 3 t n + 4 t n + 5 t n + 6 . .. .. .. .. .. .. . c o m m a n d . .. .. .. .. .. .. . . .. .. .. .. .. .. . n o p n o p n o p n o p ras# - cas# delay ( t rcd ) ras# - ras# delay time ( t rrd ) ras# cycle time ( t rc ) bank a row addr. bank a col addr. bank b row addr. bank a row addr. bank a a c t i v a t e r/w a with au top rec har ge bank b a c t i v a t e bank a a c t i v a t e aut op re ch ar ge be gi n : " h " o r " l " b a n k a c t i v a t e c o m m a n d c y c l e ( b u r s t l e n g t h = n , c a s # l a t e n c y = 3 ) 2 b a n k a c t i v a t e & m a s k e d w r i t e e n a b l e c o m m a n d ( r e f e r t o t h e a b o v e f i g u r e ) ( r a s # = " l " , c a s # = " h " , w e # = " h " , d s f = " h " , b s = b a n k , a 0 - a 9 = r o w a d d r e s s ) t h e b a n k a c t i v a t e c o m m a n d a c t i v a t e s t h e i d l e b a n k d e s i g n a t e d b y b s s i g n a l . a f t e r t h i s c o m m a n d i s p e r f o r m e d , t h e w r i t e c o m m a n d a n d t h e b l o c k w r i t e c o m m a n d p e r f o r m t h e m a s k e d w r i t e o p e r a t i o n . i n t h e m a s k e d w r i t e a n d t h e m a s k e d b l o c k w r i t e f u n c t i o n s , t h e i / o m a s k d a t a t h a t w a s s t o r e d i n t h e w r i t e m a s k r e g i s t e r i s u s e d . 3 b a n k p r e c h a r g e c o m m a n d ( r a s # = " l " , c a s # = " h " , w e # = " l " , d s f = " l " , b s = b a n k , a 9 = " l " , a 0 - a 8 = d o n ' t c a r e ) t h e b a n k p r e c h a r g e c o m m a n d p r e c h a r g e s t h e b a n k d i s i g n a t e d b y b s s i g n a l . t h e p r e c h a r g e d b a n k i s s w i t c h e d f r o m t h e a c t i v e s t a t e t o t h e i d l e s t a t e . t h i s c o m m a n d c a n b e a s s e r t e d a n y t i m e a f t e r t r a s ( m i n . ) i s s a t i s f i e d f r o m t h e b a n k a c t i v a t e c o m m a n d i n t h e d e s i r e d b a n k . t h e m a x i m u m t i m e a n y b a n k c a n b e a c t i v e i s s p e c i f i e d b y t r a s ( m a x . ) . t h e r e f o r e , t h e p r e c h a r g e f u n c t i o n m u s t b e p e r f o r m e d i n a n y a c t i v e b a n k w i t h i n t r a s ( m a x . ) . a t t h e e n d o f p r e c h a r g e , t h e p r e c h a r g e d b a n k i s s t i l l i n t h e i d l e s t a t e a n d i s r e a d y t o b e a c t i v a t e d a g a i n . 4 p r e c h a r g e a l l c o m m a n d ( r a s # = " l " , c a s # = " h " , w e # = " l " , d s f = " l " , b s = d o n ' t c a r e , a 9 = " h " , a 0 - a 8 = d o n ' t c a r e ) t h e p r e c h a r g e a l l c o m m a n d p r e c h a r g e s b o t h b a n k s s i m u l t a n e o u s l y a n d c a n b e i s s u e d e v e n i f b o t h b a n k s a r e n o t i n t h e a c t i v e s t a t e . b o t h b a n k s a r e t h e n s w i t c h e d t o t h e i d l e s t a t e . 5 r e a d c o m m a n d ( r a s # = " h " , c a s # = " l " , w e # = " h " , d s f = " l " , b s = b a n k , a 9 = " l " , a 0 - a 7 = c o l u m n a d d r e s s ) t h e r e a d c o m m a n d i s u s e d t o r e a d a b u r s t o f d a t a o n c o n s e c u t i v e c l o c k c y c l e s f r o m a n a c t i v e r o w i n a n a c t i v e b a n k . t h e b a n k m u s t b e a c t i v e f o r a t l e a s t t r c d ( m i n . ) b e f o r e t h e r e a d c o m m a n d i s i s s u e d . d u r i n g r e a d b u r s t s , t h e v a l i d d a t a - o u t e l e m e n t f r o m t h e s t a r t i n g c o l u m n a d d r e s s w i l l b e a v a i l a b l e f o l l o w i n g t h e c a s # l a t e n c y a f t e r t h e i s s u e o f t h e r e a d c o m m a n d . e a c h s u b s e q u e n t d a t a - o u t e l e m e n t w i l l b e v a l i d b y t h e n e x t p o s i t i v e c l o c k e d g e ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . t h e d q s g o etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 d e c e m b e r 1 9 9 8 i n t o h i g h - i m p e d a n c e a t t h e e n d o f t h e b u r s t u n l e s s o t h e r c o m m a n d i s i n i t i a t e d . t h e b u r s t l e n g t h , b u r s t s e q u e n c e , a n d c a s # l a t e n c y a r e d e t e r m i n e d b y t h e m o d e r e g i s t e r , w h i c h i s a l r e a d y p r o g r a m m e d . a f u l l - p a g e b u r s t w i l l c o n t i n u e u n t i l t e r m i n a t e d ( a t t h e e n d o f t h e p a g e i t w i l l w r a p t o c o l u m n 0 a n d c o n t i n u e ) . cl k c o m m a n d ca s# la ten cy =1 t ck1 , d q's cas# la tency=2 t ck2 , dq's cas# la tency=3 t ck3 , dq's t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 read a n o p n o p n o p n o p n o p n o p n o p n o p dout a 0 dout a 1 dout a 2 dout a 3 dout a 0 dout a 1 dout a 2 dout a 3 dout a 0 dout a 1 dout a 2 dout a 3 b u r s t r e a d o p e r a t i o n ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 , 2 , 3 ) t h e r e a d d a t a a p p e a r s o n t h e d q s s u b j e c t t o t h e v a l u e s o n t h e d q m i n p u t s t w o c l o c k s e a r l i e r ( i . e . d q m l a t e n c y i s t w o c l o c k s f o r o u t p u t b u f f e r s ) . a r e a d b u r s t w i t h o u t t h e a u t o p r e c h a r g e f u n c t i o n m a y b e i n t e r r u p t e d b y a s u b s e q u e n t r e a d o r w r i t e / b l o c k w r i t e c o m m a n d t o t h e s a m e b a n k o r t h e o t h e r a c t i v e b a n k b e f o r e t h e e n d o f t h e b u r s t l e n g t h . i t m a y b e i n t e r r u p t e d b y a b a n k p r e c h a r g e / p r e c h a r g e a l l c o m m a n d t o t h e s a m e b a n k t o o . t h e i n t e r r u p t c o m i n g f r o m t h e r e a d c o m m a n d c a n o c c u r o n a n y c l o c k c y c l e f o l l o w i n g a p r e v i o u s r e a d c o m m a n d ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . cl k c o m m a n d ca s# la ten cy =1 t ck1 , d q's cas# la tency=2 t ck2 , dq's cas# la tency=3 t ck3 , dq's t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 read a read b n o p n o p n o p n o p n o p n o p n o p dout a 0 dout b 0 do ut b 1 dout b 2 dout b 3 dout a 0 dout b 0 do ut b 1 dout b 2 dout b 3 dout a 0 dout b 0 do ut b 1 dout b 2 dout b 3 r e a d i n t e r r u p t e d b y a r e a d ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 , 2 , 3 ) t h e d q m i n p u t s a r e u s e d t o a v o i d i / o c o n t e n t i o n o n t h e d q p i n s w h e n t h e i n t e r r u p t c o m e s f r o m a w r i t e / b l o c k w r i t e c o m m a n d . t h e d q m s m u s t b e a s s e r t e d ( h i g h ) a t l e a s t t w o c l o c k s p r i o r t o t h e w r i t e / b l o c k w r i t e c o m m a n d t o s u p p r e s s d a t a - o u t o n t h e d q p i n s . t o g u a r a n t e e t h e d q p i n s a g a i n s t i / o c o n t e n t i o n , a s i n g l e c y c l e w i t h h i g h - i m p e d a n c e o n t h e d q p i n s m u s t o c c u r b e t w e e n t h e l a s t r e a d d a t a a n d t h e w r i t e / b l o c k w r i t e c o m m a n d ( r e f e r t o t h e f o l l o w i n g t h r e e f i g u r e s ) . i f t h e d a t a o u t p u t o f t h e b u r s t r e a d o c c u r s a t t h e s e c o n d c l o c k o f t h e b u r s t w r i t e , t h e d q m s m u s t b e a s s e r t e d ( h i g h ) a t l e a s t o n e c l o c k p r i o r t o t h e w r i t e / b l o c k w r i t e c o m m a n d t o a v o i d i n t e r n a l b u s c o n t e n t i o n . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 8 d e c e m b e r 1 9 9 8 read a n o p n o p n o p n o p wr it e b n o p n o p cl k d q m c o m m a n d dq's t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 n o p dout a 0 d i n b 0 din b 1 d i n b 2 must be hi-z before the w rite com mand : " h " o r " l " r e a d t o w r i t e i n t e r v a l ( b u r s t l e n g t h ? 4 , c a s # l a t e n c y = 3 ) cl k d q m c o m m a n d ca s# la ten cy =1 t ck1 , d q's t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 n o p n o p n o p read a writ e a n o p n o p n o p banka a c t i v a t e din a 0 din a 1 din a 2 din a 3 din a 0 din a 1 din a 2 din a 3 must be hi-z before the w rite com mand 1 clk interval cas# la tency=2 t ck2 , dq's : " h " o r " l " r e a d t o w r i t e i n t e r v a l ( b u r s t l e n g t h ? 4 , c a s # l a t e n c y = 1 , 2 ) cl k d q m c o m m a n d ca s# la ten cy =1 t ck1 , d q's t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 n o p read a n o p wr it e b n o p n o p n o p din b 0 din b 1 din b 2 din b 3 din b 0 din b 1 din b 2 din b 3 must be hi-z before the w rite com mand cas# la tency=2 t ck2 , dq's n o p n o p dout a 0 : " h " o r " l " r e a d t o w r i t e i n t e r v a l ( b u r s t l e n g t h ? 4 , c a s # l a t e n c y = 1 , 2 ) a r e a d b u r s t w i t h o u t t h e a u t o p r e c h a r g e f u n c t i o n m a y b e i n t e r r u p t e d b y a b a n k p r e c h a r g e / p r e c h a r g e a l l c o m m a n d t o t h e s a m e b a n k . t h e f o l l o w i n g f i g u r e s h o w s t h e o p t i m u m t i m e t h a t b a n k p r e c h a r g e / p r e c h a r g e a l l c o m m a n d i s i s s u e d i n d i f f e r e n t c a s # l a t e n c y . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 9 d e c e m b e r 1 9 9 8 cl k c o m m a n d cas# la tency=2 t ck2 , dq's t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 read a n o p n o p n o p n o p a c t i v a t e n o p n o p pr ech arge cas# la tency=3 t ck3 , dq's dout a 0 dout a 1 dout a 2 dout a 3 dout a 0 dout a 1 dout a 2 dout a 3 dout a 0 dout a 1 dout a 2 dout a 3 addr ess ca s# la ten cy =1 t ck1 , d q's t rp bank, col a bank (s) bank, row r e a d t o p r e c h a r g e ( c a s # l a t e n c y = 1 , 2 , 3 ) 6 r e a d a n d a u t o p r e c h a r g e c o m m a n d ( r a s # = " h " , c a s # = " l " , w e # = " h " , d s f = " l " , b s = b a n k , a 9 = " h " , a 0 - a 7 = c o l u m n a d d r e s s ) t h e r e a d a n d a u t o p r e c h a r g e c o m m a n d a u t o m a t i c a l l y p e r f o r m s t h e p r e c h a r g e o p e r a t i o n a f t e r t h e r e a d o p e r a t i o n . o n c e t h i s c o m m a n d i s g i v e n , a n y s u b s e q u e n t c o m m a n d c a n n o t o c c u r w i t h i n a t i m e d e l a y o f { t r p ( m i n . ) + b u r s t l e n g t h } . a t f u l l - p a g e b u r s t , o n l y t h e r e a d o p e r a t i o n i s p e r f o r m e d i n t h i s c o m m a n d a n d t h e a u t o p r e c h a r g e f u n c t i o n i s i g n o r e d . 7 w r i t e c o m m a n d ( r a s # = " h " , c a s # = " l " , w e # = " l " , d s f = " l " , b s = b a n k , a 9 = " l " , a 0 - a 7 = c o l u m n a d d r e s s ) t h e w r i t e c o m m a n d i s u s e d t o w r i t e a b u r s t o f d a t a o n c o n s e c u t i v e c l o c k c y c l e s f r o m a n a c t i v e r o w i n a n a c t i v e b a n k . t h e b a n k m u s t b e a c t i v e f o r a t l e a s t t r c d ( m i n . ) b e f o r e t h e w r i t e c o m m a n d i s i s s u e d . d u r i n g w r i t e b u r s t s , t h e f i r s t v a l i d d a t a - i n e l e m e n t w i l l b e r e g i s t e r e d c o i n c i d e n t w i t h t h e w r i t e c o m m a n d . s u b s e q u e n t d a t a e l e m e n t s w i l l b e r e g i s t e r e d o n e a c h s u c c e s s i v e p o s i t i v e c l o c k e d g e ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . t h e d q s r e m a i n w i t h h i g h - i m p e d a n c e a t t h e e n d o f t h e b u r s t u n l e s s a n o t h e r c o m m a n d i s i n i t i a t e d . t h e b u r s t l e n g t h a n d b u r s t s e q u e n c e a r e d e t e r m i n e d b y t h e m o d e r e g i s t e r , w h i c h i s a l r e a d y p r o g r a m m e d . a f u l l - p a g e b u r s t w i l l c o n t i n u e u n t i l t e r m i n a t e d ( a t t h e e n d o f t h e p a g e i t w i l l w r a p t o c o l u m n 0 a n d c o n t i n u e ) . cl k c o m m a n d t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 din a 3 n o p writ e a n o p n o p n o p n o p n o p n o p n o p din a 0 din a 1 din a 2 dq0 - dq3 the first data element and the write are registered on the same clock edge. extra data is masked. don't care b u r s t w r i t e o p e r a t i o n ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 , 2 , 3 ) a n y w r i t e p e r f o r m e d t o a r o w t h a t w a s o p e n e d v i a a n b a n k a c t i v a t e & m a s k e d w r i t e e n a b l e c o m m a n d i s a m a s k e d w r i t e ( w r i t e - p e r - b i t ) . d a t a i s w r i t t e n t o t h e 3 2 c e l l s ( b i t s ) a t t h e s e l e c t e d c o l u m n l o c a t i o n s u b j e c t t o t h e d a t a s t o r e d i n t h e m a s k r e g i s t e r . t h e o v e r a l l m a s k c o n s i s t s o f t h e d q m i n p u t s , w h i c h m a s k o n a p e r - b y t e b a s i s , a n d t h e m a s k r e g i s t e r , w h i c h m a s k s a l s o o n a p e r - b i t b a s i s . t h i s i s s h o w n i n t h e f o l l o w i n g b l o c k d i a g r a m . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 0 d e c e m b e r 1 9 9 8 dsf ba n k a c t i v a te c o m m a n d d ck q d q m 0 m r 7 m r 6 m r 5 m r 4 m r 3 m r 2 m r 1 m r 0 dq 7 dq 6 dq 5 dq 4 dq 3 dq 2 dq 1 dq 0 dr am c e l l 0 = masked 1 = not masked n o t e : o n l y t h e l o w e r b y t e i s s h o w n . t h e o p e r a t i o n i s i d e n t i c a l f o r o t h e r b y t e s . w r i t e p e r b i t ( i / o m a s k ) b l o c k d i a g r a m a w r i t e b u r s t w i t h o u t t h e a u t o p r e c h a r g e f u n c t i o n m a y b e i n t e r r u p t e d b y a s u b s e q u e n t w r i t e / b l o c k w r i t e , b a n k p r e c h a r g e / p r e c h a r g e a l l , o r r e a d c o m m a n d b e f o r e t h e e n d o f t h e b u r s t l e n g t h . a n i n t e r r u p t c o m i n g f r o m w r i t e / b l o c k w r i t e c o m m a n d c a n o c c u r o n a n y c l o c k c y c l e f o l l o w i n g t h e p r e v i o u s w r i t e c o m m a n d ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . cl k c o m m a n d t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 din b 2 n o p writ e a n o p n o p n o p n o p n o p wr it e b n o p din a 0 din b 0 din b 1 dq's din b 3 1 clk interval w r i t e i n t e r r u p t e d b y a w r i t e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 , 2 , 3 ) t h e r e a d c o m m a n d t h a t i n t e r r u p t s a w r i t e b u r s t w i t h o u t a u t o p r e c h a r g e f u n c t i o n s h o u l d b e i s s u e d o n e c y c l e a f t e r t h e c l o c k e d g e i n w h i c h t h e l a s t d a t a - i n e l e m e n t i s r e g i s t e r e d . i n o r d e r t o a v o i d d a t a c o n t e n t i o n , i n p u t d a t a m u s t b e r e m o v e d f r o m t h e d q s a t l e a s t o n e c l o c k c y c l e b e f o r e t h e etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 1 d e c e m b e r 1 9 9 8 f i r s t r e a d d a t a a p p e a r s o n t h e o u t p u t s ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . o n c e t h e r e a d c o m m a n d i s r e g i s t e r e d , t h e d a t a i n p u t s w i l l b e i g n o r e d a n d w r i t e s w i l l n o t b e e x e c u t e d . cl k c o m m a n d t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 dout b 2 n o p writ e a n o p n o p n o p n o p n o p read b n o p din a 0 dout b 0 do ut b 1 ca s# la ten cy =1 t ck1 , d q's dout b 3 don't care din a 0 dout b 2 dout b 0 do ut b 1 dout b 3 din a 0 don't care don't care dout b 2 dout b 0 do ut b 1 dout b 3 input data for the write is masked. input data must be removed from the dq's at least one clock cycle before the read data appears on the outputs to avoid data contention. cas# la tency=2 t ck2 , dq's cas# la tency=3 t ck3 , dq's w r i t e i n t e r r u p t e d b y a r e a d ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 , 2 , 3 ) t h e b a n k p r e c h a r g e / p r e c h a r g e a l l c o m m a n d t h a t i n t e r r u p t s a w r i t e b u r s t w i t h o u t t h e a u t o p r e c h a r g e f u n c t i o n s h o u l d b e i s s u e d m c y c l e s a f t e r t h e c l o c k e d g e i n w h i c h t h e l a s t d a t a - i n e l e m e n t i s r e g i s t e r e d , w h e r e m e q u a l s t w r / t c k r o u n d e d u p t o t h e n e x t w h o l e n u m b e r . i n a d d i t i o n , t h e d q m s i g n a l s m u s t b e u s e d t o m a s k i n p u t d a t a , s t a r t i n g w i t h t h e c l o c k e d g e f o l l o w i n g t h e l a s t d a t a - i n e l e m e n t a n d e n d i n g w i t h t h e c l o c k e d g e o n w h i c h t h e b a n k p r e c h a r g e / p r e c h a r g e a l l c o m m a n d i s e n t e r e d ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . cl k t0 t 1 t2 t3 t4 t 5 t6 w r i t e c o m m a n d bank (s) r o w n o p n o p pr ech arge n o p n o p a c t i v a t e b a n k c ol n d i n n d i n n + 1 d q m addr ess dq t w r t r p : d o n ' t c a r e n o t e : t h e d q m s c a n r e m a i n l o w i n t h i s e x a m p l e i f t h e l e n g t h o f t h e w r i t e b u r s t i s 1 o r 2 . w r i t e t o p r e c h a r g e w h e n t h e b u r s t - r e a d - s i n g l e - w r i t e m o d e i s s e l e c t e d , t h e w r i t e b u r s t l e n g t h i s 1 r e g a r d l e s s o f t h e r e a d b u r s t l e n g t h ( r e f e r t o f i g u r e s 2 1 a n d 2 2 i n t i m i n g w a v e f o r m s ) . 8 b l o c k w r i t e c o m m a n d ( r a s # = " h " , c a s # = " l " , w e # = " l " , d s f = " h " , b s = b a n k , a 9 = " l " , a 3 - a 7 = c o l u m n a d d r e s s , d q 0 - d q 3 1 = c o l u m n m a s k ) t h e b l o c k w r i t e s a r e n o n - b u r s t a c c e s s e s t h a t w r i t e t o e i g h t c o l u m n l o c a t i o n s s i m u l t a n e o u s l y . a s i n g l e d a t a v a l u e , w h i c h w a s p r e v i o u s l y l o a d e d i n t h e c o l o r r e g i s t e r , i s w r i t t e n t o t h e b l o c k o f e i g h t c o n s e c u t i v e c o l u m n l o c a t i o n s a d d r e s s e d b y i n p u t s a 3 ~ a 7 . t h e i n f o r m a t i o n o n t h e d q s w h i c h a r e etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 2 d e c e m b e r 1 9 9 8 r e g i s t e r e d c o i n c i d e n t w i t h t h e b l o c k w r i t e c o m m a n d i s u s e d t o m a s k s p e c i f i c c o l u m n / b y t e c o m b i n a t i o n s w i t h i n t h e b l o c k . t h e m a p p i n g o f t h e d q i n p u t s t o t h e c o l u m n / b y t e c o m b i n a t i o n s i s s h o w n i n f o l l o w i n g t a b l e . t h e o v e r a l l b l o c k w r i t e m a s k c o n s i s t s o f a c o m b i n a t i o n o f t h e d q m i n p u t s , t h e m a s k r e g i s t e r , a n d t h e c o l u m n / b y t e m a s k i n f o r m a t i o n , a s s h o w n i n t h e f o l l o w i n g f i g u r e . t h e d q m a n d m a s k r e g i s t e r m a s k i n g o p e r a t e s n o r m a l l y a s f o r a w r i t e c o m m a n d , w i t h t h e e x c e p t i o n t h a t t h e m a s k i n f o r m a t i o n i s a p p l i e d s i m u l t a n e o u s l y t o a l l e i g h t c o l u m n s . t h e r e f o r e , i n a b l o c k w r i t e , a g i v e n b i t i s w r i t t e n o n l y i f a " 0 " i s r e g i s t e r e d f o r t h e c o r r e s p o n d i n g d q m i n p u t , a " 1 " i s r e g i s t e r e d f o r t h e c o r r e s p o n d i n g d q s i g n a l , a n d t h e c o r r e s p o n d i n g b i t i n t h e m a s k r e g i s t e r i s " 1 " . block of columns (selected by a3-a7 registered coincident with block write command) row in bank (selected by a0-a9, and bs registered coincident with bankactivate command) dq 0 d q 1 dq 2 dq 3 dq 4 dq 5 dq 6 dq 7 column mask on the dq in pu ts (r eg is te re d co in c id e nt with block write command m r 0 m r 1 m r 2 m r 3 m r 4 mr5 m r 6 mr7 mask register (previously loaded from corresponding dq inputs) c r0 cr 1 c r2 c r3 c r4 c r5 c r6 c r7 dqm0 q d ck dsf bankac tivate co mm an d n o t e : o n l y t h e l o w e r b y t e i s s h o w n . t h e o p e r a t i o n i s i d e n t i c a l f o r o t h e r b y t e s . b l o c k - w r i t e m a s k i n g b l o c k d i a g r a m etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 3 d e c e m b e r 1 9 9 8 d q c o l u m n a d d r e s s d q p l a n e s d q c o l u m n a d d r e s s d q p l a n e s i n p u t s a 2 a 1 a 0 c o n t r o l l e d i n p u t s a 2 a 1 a 0 c o n t r o l l e d d q 0 0 0 0 0 ~ 7 d q 1 6 0 0 0 1 6 ~ 2 3 d q 1 0 0 1 0 ~ 7 d q 1 7 0 0 1 1 6 ~ 2 3 d q 2 0 1 0 0 ~ 7 d q 1 8 0 1 0 1 6 ~ 2 3 d q 3 0 1 1 0 ~ 7 d q 1 9 0 1 1 1 6 ~ 2 3 d q 4 1 0 0 0 ~ 7 d q 2 0 1 0 0 1 6 ~ 2 3 d q 5 1 0 1 0 ~ 7 d q 2 1 1 0 1 1 6 ~ 2 3 d q 6 1 1 0 0 ~ 7 d q 2 2 1 1 0 1 6 ~ 2 3 d q 7 1 1 1 0 ~ 7 d q 2 3 1 1 1 1 6 ~ 2 3 d q 8 0 0 0 8 ~ 1 5 d q 2 4 0 0 0 2 4 ~ 3 1 d q 9 0 0 1 8 ~ 1 5 d q 2 5 0 0 1 2 4 ~ 3 1 d q 1 0 0 1 0 8 ~ 1 5 d q 2 6 0 1 0 2 4 ~ 3 1 d q 1 1 0 1 1 8 ~ 1 5 d q 2 7 0 1 1 2 4 ~ 3 1 d q 1 2 1 0 0 8 ~ 1 5 d q 2 8 1 0 0 2 4 ~ 3 1 d q 1 3 1 0 1 8 ~ 1 5 d q 2 9 1 0 1 2 4 ~ 3 1 d q 1 4 1 1 0 8 ~ 1 5 d q 3 0 1 1 0 2 4 ~ 3 1 d q 1 5 1 1 1 8 ~ 1 5 d q 3 1 1 1 1 2 4 ~ 3 1 a b l o c k w r i t e a c c e s s r e q u i r e s a t i m e p e r i o d o f t b w c t o e x e c u t e , s o i n g e n e r a l , t h e r e s h o u l d b e m n o p c y c l e s ( m e q u a l s ( t b w c - t c k ) / t c k r o u n d e d u p t o t h e n e x t w h o l e n u m b e r ) , a f t e r t h e b l o c k w r i t e c o m m a n d . h o w e v e r , b a n k a c t i v a t e o r b a n k p r e c h a r g e c o m m a n d s t o t h e o t h e r b a n k a r e a l l o w e d . w h e n f o l l o w i n g a b l o c k w r i t e w i t h a b a n k p r e c h a r g e o r p r e c h a r g e a l l c o m m a n d t o t h e s a m e b a n k , t b p l m u s t b e m e t . 9 w r i t e a n d a u t o p r e c h a r g e c o m m a n d ( r e f e r t o t h e f o l l o w i n g f i g u r e ) ( r a s # = " h " , c a s # = " l " , w e # = " l " , d s f = " l " , b s = b a n k , a 9 = " h " , a 0 - a 7 = c o l u m n a d d r e s s ) t h e w r i t e a n d a u t o p r e c h a r g e c o m m a n d p e r f o r m s t h e p r e c h a r g e o p e r a t i o n a u t o m a t i c a l l y a f t e r t h e w r i t e o p e r a t i o n . o n c e t h i s c o m m a n d i s g i v e n , a n y s u b s e q u e n t c o m m a n d c a n n o t o c c u r w i t h i n a t i m e d e l a y o f { ( b u r s t l e n g t h - 1 ) + t w r + t r p ( m i n . ) } . a t f u l l - p a g e b u r s t , o n l y t h e w r i t e o p e r a t i o n i s p e r f o r m e d i n t h i s c o m m a n d a n d t h e a u t o p r e c h a r g e f u n c t i o n i s i g n o r e d . cl k c o m m a n d t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 n o p n o p n o p n o p n o p n o p n o p din a 0 din a 1 ca s# la ten cy =1 t ck1 , d q's cas# la tency=2 t ck2 , dq's cas# la tency=3 t ck3 , dq's din a 0 din a 1 din a 0 din a 1 t dal * * * t dal = t wr + t rp * begin autoprecharge bank can be reactivated at completion of t dal bank a a c t i v a t e write a au top rec har ge t dal t dal b u r s t w r i t e w i t h a u t o - p r e c h a r g e ( b u r s t l e n g t h = 2 , c a s # l a t e n c y = 1 , 2 , 3 ) etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 4 d e c e m b e r 1 9 9 8 1 0 b l o c k w r i t e a n d a u t o p r e c h a r g e c o m m a n d ( r a s # = " h " , c a s # = " l " , w e # = " h " , d s f = " h " , b s = b a n k , a 9 = " h " , a 3 - a 7 = c o l u m n a d d r e s s , d q 0 - d q 3 1 = c o l u m n m a s k ) t h e b l o c k w r i t e a n d a u t o p r e c h a r g e c o m m a n d p e r f o r m s t h e p r e c h a r g e o p e r a t i o n a u t o m a t i c a l l y a f t e r t h e b l o c k w r i t e o p e r a t i o n . o n c e t h i s c o m m a n d i s g i v e n , a n y s u b s e q u e n t c o m m a n d c a n n o t o c c u r w i t h i n a t i m e d e l a y o f { t b p l + t r p ( m i n . ) } . 1 1 m o d e r e g i s t e r s e t c o m m a n d ( r a s # = " l " , c a s # = " l " , w e # = " l " , d s f = " l " , b s , a 0 - a 9 = r e g i s t e r d a t a ) t h e m o d e r e g i s t e r s t o r e s t h e d a t a f o r c o n t r o l l i n g t h e v a r i o u s o p e r a t i n g m o d e s o f s g r a m . t h e m o d e r e g i s t e r s e t c o m m a n d p r o g r a m s t h e v a l u e s o f c a s # l a t e n c y , a d d r e s s i n g m o d e a n d b u r s t l e n g t h i n t h e m o d e r e g i s t e r t o m a k e s g r a m u s e f u l f o r a v a r i e t y o f d i f f e r e n t a p p l i c a t i o n s . t h e d e f a u l t v a l u e s o f t h e m o d e r e g i s t e r a f t e r p o w e r - u p a r e u n d e f i n e d ; t h e r e f o r e t h i s c o m m a n d m u s t b e i s s u e d a t t h e p o w e r - u p s e q u e n c e . t h e s t a t e o f p i n s a 0 ~ a 8 a n d b s i n t h e s a m e c y c l e i s t h e d a t a w r i t t e n t o t h e m o d e r e g i s t e r . o n e c l o c k c y c l e i s r e q u i r e d t o c o m p l e t e t h e w r i t e i n t h e m o d e r e g i s t e r ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . t h e c o n t e n t s o f t h e m o d e r e g i s t e r c a n b e c h a n g e d u s i n g t h e s a m e c o m m a n d a n d t h e c l o c k c y c l e r e q u i r e m e n t s d u r i n g o p e r a t i o n a s l o n g a s b o t h b a n k s a r e i n t h e i d l e s t a t e . r a s # t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 cl k cke c s # c a s # we # bs a 9 a 0 - a 8 d q m dq t c k 2 clock min. address key t rp h i -z pre cha rge all mode register set co mmand a n y comm and dsf m o d e r e g i s t e r s e t c y c l e ( c a s # l a t e n c y = 1 , 2 , 3 ) etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 5 d e c e m b e r 1 9 9 8 t h e m o d e r e g i s t e r i s d i v i d e d i n t o v a r i o u s f i e l d s d e p e n d i n g o n f u n c t i o n a l i t y . b u r s t l e n g t h f i e l d ( a 2 ~ a 0 ) t h i s f i e l d s p e c i f i e s t h e d a t a l e n g t h o f c o l u m n a c c e s s u s i n g t h e a 2 ~ a 0 p i n s a n d s e l e c t s t h e b u r s t l e n g t h t o b e 1 , 2 , 4 , 8 , o r f u l l p a g e . a 2 a 1 a 0 b u r s t l e n g t h 0 0 0 1 0 0 1 2 0 1 0 4 0 1 1 8 1 0 0 r e s e r v e d 1 0 1 r e s e r v e d 1 1 0 r e s e r v e d 1 1 1 f u l l p a g e a d d r e s s i n g m o d e s e l e c t f i e l d ( a 3 ) t h e a d d r e s s i n g m o d e c a n b e o n e o f t w o m o d e s , i n t e r l e a v e m o d e o r s e q u e n t i a l m o d e . s e q u e n t i a l m o d e s u p p o r t s b u r s t l e n g t h o f 1 , 2 , 4 , 8 , o r f u l l p a g e , b u t i n t e r l e a v e m o d e o n l y s u p p o r t s b u r s t l e n g t h o f 4 a n d 8 . a 3 a d d r e s s i n g m o d e 0 s e q u e n t i a l 1 i n t e r l e a v e - - - a d d r e s s i n g s e q u e n c e o f s e q u e n t i a l m o d e a n i n t e r n a l c o l u m n a d d r e s s i s p e r f o r m e d b y i n c r e a s i n g t h e a d d r e s s f r o m t h e c o l u m n a d d r e s s w h i c h i s i n p u t t o t h e d e v i c e . t h e i n t e r n a l c o l u m n a d d r e s s i s v a r i e d b y t h e b u r s t l e n g t h a s s h o w n i n t h e f o l l o w i n g t a b l e . w h e n t h e v a l u e o f c o l u m n a d d r e s s , ( n + m ) , i n t h e t a b l e i s l a r g e r t h a n 2 5 5 , o n l y t h e l e a s t s i g n i f i c a n t 8 b i t s a r e e f f e c t i v e . d a t a n 0 1 2 3 4 5 6 7 - 2 5 5 2 5 6 2 5 7 - c o l u m n a d d r e s s n n + 1 n + 2 n + 3 n + 4 n + 5 n + 6 n + 7 - n + 2 5 5 n n + 1 - 2 w o r d s : b u r s t l e n g t h 4 w o r d s : 8 w o r d s : f u l l p a g e : c o l u m n a d d r e s s i s r e p e a t e d u n t i l t e r m i n a t e d . - - - a d d r e s s i n g s e q u e n c e o f i n t e r l e a v e m o d e a c o l u m n a c c e s s i s s t a r t e d i n t h e i n p u t c o l u m n a d d r e s s a n d i s p e r f o r m e d b y i n v e r t i n g t h e a d d r e s s b i t s i n t h e s e q u e n c e s h o w n i n t h e f o l l o w i n g t a b l e . d a t a n c o l u m n a d d r e s s b u r s t l e n g t h d a t a 0 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 d a t a 1 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 # 4 w o r d s d a t a 2 a 7 a 6 a 5 a 4 a 3 a 2 a 1 # a 0 d a t a 3 a 7 a 6 a 5 a 4 a 3 a 2 a 1 # a 0 # 8 w o r d s d a t a 4 a 7 a 6 a 5 a 4 a 3 a 2 # a 1 a 0 d a t a 5 a 7 a 6 a 5 a 4 a 3 a 2 # a 1 a 0 # d a t a 6 a 7 a 6 a 5 a 4 a 3 a 2 # a 1 # a 0 d a t a 7 a 7 a 6 a 5 a 4 a 3 a 2 # a 1 # a 0 # c a s # l a t e n c y f i e l d ( a 6 ~ a 4 ) etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 6 d e c e m b e r 1 9 9 8 t h i s f i e l d s p e c i f i e s t h e n u m b e r o f c l o c k c y c l e s f r o m t h e a s s e r t i o n o f t h e r e a d c o m m a n d t o t h e f i r s t r e a d d a t a . t h e m i n i m u m w h o l e v a l u e o f c a s # l a t e n c y d e p e n d s o n t h e f r e q u e n c y o f c l k . t h e m i n i m u m w h o l e v a l u e s a t i s f y i n g t h e f o l l o w i n g f o r m u l a m u s t b e p r o g r a m m e d i n t o t h i s f i e l d . t c a c ( m i n ) ?? c a s # l a t e n c y x t c k a 6 a 5 a 4 c a s # l a t e n c y 0 0 0 r e s e r v e d 0 0 1 1 c l o c k 0 1 0 2 c l o c k s 0 1 1 3 c l o c k s 1 x x r e s e r v e d t e s t m o d e f i e l d ( a 9 ~ a 7 ) t h e s e t w o b i t s a r e u s e d t o e n t e r t h e t e s t m o d e a n d m u s t b e p r o g r a m m e d t o " 0 0 " i n n o r m a l o p e r a t i o n . a 9 a 8 a 7 t e s t m o d e x 0 0 n o r m a l m o d e x 0 1 v e n d o r u s e o n l y x 1 x v e n d o r u s e o n l y s i n g l e w r i t e m o d e ( b s ) t h i s b i t i s u s e d t o s e l e c t t h e w r i t e m o d e . w h e n t h e b s b i t i s " 0 " , t h e b u r s t - r e a d - b u r s t - w r i t e m o d e i s s e l e c t e d . w h e n t h e b s b i t i s " 1 " , t h e b u r s t - r e a d - s i n g l e - w r i t e m o d e i s s e l e c t e d . b s s i n g l e w r i t e m o d e 0 b u r s t - r e a d - b u r s t - w r i t e 1 b u r s t - r e a d - s i n g l e - w r i t e 1 2 s p e c i a l m o d e r e g i s t e r s e t c o m m a n d ( r a s # = " l " , c a s # = " l " , w e # = " l " , d s f = " h " , b s , a 0 - a 9 = r e g i s t e r d a t a ) t h e s p e c i a l m o d e r e g i s t e r i s u s e d t o l o a d t h e c o l o r a n d m a s k r e g i s t e r s , w h i c h a r e u s e d i n b l o c k w r i t e a n d m a s k e d w r i t e c y c l e s . t h e c o n t r o l i n f o r m a t i o n b e i n g w r i t t e n t o t h e s p e c i a l m o d e r e g i s t e r i s a p p l i e d t o t h e a d d r e s s i n p u t s a n d t h e d a t a t o b e w r i t t e n t o e i t h e r t h e c o l o r r e g i s t e r o r t h e m a s k r e g i s t e r i s a p p l i e d t o t h e d q s . w h e n a 6 i s " h i g h " d u r i n g a s p e c i a l m o d e r e g i s t e r s e t c y c l e , t h e c o l o r r e g i s t e r w i l l b e l o a d e d w i t h t h e d a t a o n t h e d q s . s i m i l a r l y , w h e n a 5 i s " h i g h " d u r i n g a s p e c i a l m o d e r e g i s t e r s e t c y c l e , t h e m a s k r e g i s t e r w i l l b e l o a d e d w i t h t h e d a t a o n t h e d q s . a 6 = a 5 = 1 i n t h e s p e c i a l m o d e r e g i s t e r s e t c y c l e i s i l l e g a l . f u n c t i o n s b s a 9 ~ a 7 a 6 a 5 a 4 ~ a 0 l e a v e u n c h a n g e d x x 0 0 x l o a d m a s k r e g i s t e r x x 0 1 x l o a d c o l o r r e g i s t e r x x 1 0 x i l l e g a l x x 1 1 x o n e c l o c k c y c l e i s r e q u i r e d t o c o m p l e t e t h e w r i t e i n t h e s p e c i a l m o d e r e g i s t e r . t h i s c o m m a n d c a n b e i s s u e d d u r i n g t h e a c t i v e s t a t e . a s i n a w r i t e o p e r a t i o n , t h i s c o m m a n d a c c e p t s t h e d a t a n e e d e d t h r o u g h d q p i n s . t h e r e f o r e , i t s h o u l d b e a t t e n d e d n o t t o i n d u c e b u s c o n t e n t i o n . 1 3 n o - o p e r a t i o n c o m m a n d ( r a s # = " h " , c a s # = " h " , w e # = " h " ) t h e n o - o p e r a t i o n c o m m a n d i s u s e d t o p e r f o r m a n o p t o t h e s g r a m w h i c h i s s e l e c t e d ( c s # i s l o w ) . t h i s p r e v e n t s u n w a n t e d c o m m a n d s f r o m b e i n g r e g i s t e r e d d u r i n g i d l e o r w a i t s t a t e s . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 7 d e c e m b e r 1 9 9 8 1 4 b u r s t s t o p c o m m a n d ( r a s # = " h " , c a s # = " h " , w e # = " l " , d s f = " l " ) t h e b u r s t s t o p c o m m a n d i s u s e d t o t e r m i n a t e e i t h e r f i x e d - l e n g t h o r f u l l - p a g e b u r s t s . t h i s c o m m a n d i s o n l y e f f e c t i v e i n a r e a d / w r i t e b u r s t w i t h o u t t h e a u t o p r e c h a r g e f u n c t i o n . t h e t e r m i n a t e d r e a d b u r s t e n d s a f t e r a d e l a y e q u a l t o t h e c a s # l a t e n c y ( r e f e r t o t h e f o l l o w i n g f i g u r e ) . t h e t e r m i n a t i o n o f a w r i t e b u r s t i s s h o w n i n t h e f o l l o w i n g f i g u r e . cl k c o m m a n d t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 read a n o p n o p n o p n o p n o p n o p n o p burst stop dout a 0 dout a 1 dout a 2 dout a 3 ca s# la ten cy =1 t ck1 , d q's cas# la tency=2 t ck2 , dq's cas# la tency=3 t ck3 , dq's dout a 0 dout a 1 dout a 2 dout a 3 dout a 0 dout a 1 dout a 2 dout a 3 the burst ends after a delay equal to the cas# latency. t e r m i n a t i o n o f a b u r s t r e a d o p e r a t i o n ( b u r s t l e n g t h ?? 4 , c a s # l a t e n c y = 1 , 2 , 3 ) cl k c o m m a n d t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 n o p writ e a n o p n o p n o p n o p n o p n o p burst stop ca s# l aten cy=1 , 2, 3 dq's din a 0 din a 1 din a 2 don't care input data for the write is masked. t e r m i n a t i o n o f a b u r s t w r i t e o p e r a t i o n ( b u r s t l e n g t h = x , c a s # l a t e n c y = 1 , 2 , 3 ) 1 5 d e v i c e d e s e l e c t c o m m a n d ( c s # = " h " ) t h e d e v i c e d e s e l e c t c o m m a n d d i s a b l e s t h e c o m m a n d d e c o d e r s o t h a t t h e r a s # , c a s # , w e # a n d a d d r e s s i n p u t s a r e i g n o r e d , r e g a r d l e s s o f w h e t h e r t h e c l k i s e n a b l e d . t h i s c o m m a n d i s s i m i l a r t o t h e n o o p e r a t i o n c o m m a n d . 1 6 a u t o r e f r e s h c o m m a n d ( r e f e r t o f i g u r e s 3 & 4 i n t i m i n g w a v e f o r m s ) ( r a s # = " l " , c a s # = " l " , w e # = " h " , d s f = " l " , c k e = " h " , b s , a 0 - a 9 = d o n ' t c a r e ) t h e a u t o r e f r e s h c o m m a n d i s u s e d d u r i n g n o r m a l o p e r a t i o n o f t h e s g r a m a n d i s a n a l o g o u s t o c a s # - b e f o r e - r a s # ( c b r ) r e f r e s h i n c o n v e n t i o n a l d r a m s . t h i s c o m m a n d i s n o n - p e r s i s t e n t , s o i t m u s t b e i s s u e d e a c h t i m e a r e f r e s h i s r e q u i r e d . t h e a d d r e s s i n g i s g e n e r a t e d b y t h e i n t e r n a l r e f r e s h c o n t r o l l e r . t h i s m a k e s t h e a d d r e s s b i t s a " d o n ' t c a r e " d u r i n g a n a u t o r e f r e s h c o m m a n d . t h e i n t e r n a l r e f r e s h c o u n t e r i n c r e m e n t s a u t o m a t i c a l l y o n e v e r y a u t o r e f r e s h c y c l e t o a l l o f t h e r o w s . t h e r e f r e s h o p e r a t i o n m u s t b e p e r f o r m e d 2 0 4 8 t i m e s w i t h i n 3 2 m s . t h e t i m e r e q u i r e d t o c o m p l e t e t h e a u t o r e f r e s h o p e r a t i o n i s s p e c i f i e d b y t r c ( m i n . ) . t o p r o v i d e t h e a u t o r e f r e s h c o m m a n d , b o t h b a n k s n e e d t o b e i n t h e i d l e s t a t e a n d t h e d e v i c e m u s t n o t b e i n p o w e r d o w n m o d e ( c k e i s h i g h i n t h e p r e v i o u s c y c l e ) . t h i s c o m m a n d m u s t b e f o l l o w e d b y n o p s u n t i l t h e a u t o r e f r e s h o p e r a t i o n i s c o m p l e t e d . t h e p r e c h a r g e t i m e r e q u i r e m e n t , t r p ( m i n ) , m u s t b e m e t b e f o r e s u c c e s s i v e a u t o r e f r e s h o p e r a t i o n s a r e p e r f o r m e d . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 8 d e c e m b e r 1 9 9 8 1 7 s e l f r e f r e s h e n t r y c o m m a n d ( r e f e r t o f i g u r e 5 i n t i m i n g w a v e f o r m s ) ( r a s # = " l " , c a s # = " l " , w e # = " h " , d s f = " l " , c k e = " l " , b s , a 0 - a 9 = d o n ' t c a r e ) t h e s e l f r e f r e s h i s a n o t h e r r e f r e s h m o d e a v a i l a b l e i n t h e s g r a m . i t i s t h e p r e f e r r e d r e f r e s h m o d e f o r d a t a r e t e n t i o n a n d l o w p o w e r o p e r a t i o n . o n c e t h e s e l f r e f r e s h c o m m a n d i s r e g i s t e r e d , a l l t h e i n p u t s t o t h e s g r a m b e c o m e " d o n ' t c a r e " w i t h t h e e x c e p t i o n o f c k e , w h i c h m u s t r e m a i n l o w . t h e r e f r e s h a d d r e s s i n g a n d t i m i n g i s i n t e r n a l l y g e n e r a t e d t o r e d u c e p o w e r c o n s u m p t i o n . t h e s g r a m m a y r e m a i n i n s e l f r e f r e s h m o d e f o r a n i n d e f i n i t e p e r i o d . t h e s e l f r e f r e s h m o d e i s e x i t e d b y r e s t a r t i n g t h e e x t e r n a l c l o c k a n d t h e n a s s e r t i n g h i g h o n c k e ( s e l f r e f r e s h e x i t c o m m a n d ) . 1 8 s e l f r e f r e s h e x i t c o m m a n d ( r e f e r t o f i g u r e 5 i n t i m i n g w a v e f o r m s ) ( c k e = " h " , c s # = " h " o r c k e = " h " , r a s # = " h " , c a s # = " h " , w e # = " h " ) t h i s c o m m a n d i s u s e d t o e x i t f r o m t h e s e l f r e f r e s h m o d e . o n c e t h i s c o m m a n d i s r e g i s t e r e d , n o p o r d e v i c e d e s e l e c t c o m m a n d s m u s t b e i s s u e d f o r t r c ( m i n . ) b e c a u s e t i m e i s r e q u i r e d f o r t h e c o m p l e t i o n o f a n y b a n k c u r r e n t l y b e i n g i n t e r n a l l y r e f r e s h e d . i f a u t o r e f r e s h c y c l e s i n b u r s t s a r e p e r f o r m e d d u r i n g n o r m a l o p e r a t i o n , a b u r s t o f 2 0 4 8 a u t o r e f r e s h c y c l e s s h o u l d b e c o m p l e t e d j u s t p r i o r t o e n t e r i n g a n d j u s t a f t e r e x i t i n g t h e s e l f r e f r e s h m o d e . 1 9 c l o c k s u s p e n d m o d e e n t r y / p o w e r d o w n m o d e e n t r y c o m m a n d ( r e f e r t o f i g u r e s 6 , 7 , a n d 8 i n t i m i n g w a v e f o r m s ) ( c k e = " l " ) w h e n t h e s g r a m i s o p e r a t i n g t h e b u r s t c y c l e , t h e i n t e r n a l c l k i s s u s p e n d e d ( m a s k e d ) f r o m t h e s u b s e q u e n t c y c l e b y i s s u i n g t h i s c o m m a n d ( a s s e r t i n g c k e " l o w " ) . t h e d e v i c e o p e r a t i o n i s h e l d i n t a c t w h i l e c l k i s s u s p e n d e d . o n t h e o t h e r h a n d , w h e n b o t h b a n k s a r e i n t h e i d l e s t a t e , t h i s c o m m a n d p e r f o r m s e n t r y i n t o t h e p o w e r d o w n m o d e . a l l i n p u t a n d o u t p u t b u f f e r s ( e x c e p t t h e c k e b u f f e r ) a r e t u r n e d o f f i n t h e p o w e r d o w n m o d e . t h e d e v i c e m a y n o t r e m a i n i n t h e c l o c k s u s p e n d o r p o w e r d o w n s t a t e l o n g e r t h a n t h e r e f r e s h p e r i o d ( 3 2 m s ) s i n c e t h e c o m m a n d d o e s n o t p e r f o r m a n y r e f r e s h o p e r a t i o n s . 2 0 c l o c k s u s p e n d m o d e e x i t / p o w e r d o w n m o d e e x i t c o m m a n d ( r e f e r t o f i g u r e s 6 , 7 , a n d 8 i n t i m i n g w a v e f o r m s ) ( c k e = " h " ) w h e n t h e i n t e r n a l c l k h a s b e e n s u s p e n d e d , t h e o p e r a t i o n o f t h e i n t e r n a l c l k i s r e i n i t i a t e d f r o m t h e s u b s e q u e n t c y c l e b y p r o v i d i n g t h i s c o m m a n d ( a s s e r t i n g c k e " h i g h " ) . w h e n t h e d e v i c e i s i n t h e p o w e r d o w n m o d e , t h e d e v i c e e x i t s t h i s m o d e a n d a l l d i s a b l e d b u f f e r s a r e t u r n e d o n t o t h e a c t i v e s t a t e . t p d e ( m i n . ) i s r e q u i r e d w h e n t h e d e v i c e e x i t s f r o m t h e p o w e r d o w n m o d e . a n y s u b s e q u e n t c o m m a n d s c a n b e i s s u e d a f t e r o n e c l o c k c y c l e f r o m t h e e n d o f t h i s c o m m a n d . 2 1 d a t a w r i t e / o u t p u t e n a b l e , d a t a m a s k / o u t p u t d i s a b l e c o m m a n d ( d q m = " l " , " h " ) d u r i n g a w r i t e c y c l e , t h e d q m s i g n a l f u n c t i o n s a s a d a t a m a s k a n d c a n c o n t r o l e v e r y w o r d o f t h e i n p u t d a t a . d u r i n g a r e a d c y c l e , t h e d q m f u n c t i o n s a s t h e c o n t r o l l e r o f o u t p u t b u f f e r s . d q m i s a l s o u s e d f o r d e v i c e s e l e c t i o n , b y t e s e l e c t i o n a n d b u s c o n t r o l i n a m e m o r y s y s t e m . d q m 0 c o n t r o l s d q 0 t o d q 7 , d q m 1 c o n t r o l s d q 8 t o d q 1 5 , d q m 2 c o n t r o l s d q 1 6 t o d q 2 3 , a n d d q m 3 c o n t r o l s d q 2 4 t o d q 3 1 . d q m m a s k s t h e d q ' s b y a b y t e r e g a r d l e s s t h a t t h e c o r r e s p o n d i n g d q ' s a r e i n a s t a t e o f w r i t e - p e r - b i t m a s k i n g o r p i x e l m a s k i n g . e a c h d q m 0 - 3 c o r r e s p o n d s t o d q 0 - 7 , d q 8 - 1 5 , d q 1 6 - 2 3 , a n d d q 2 4 - 3 1 . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 1 9 d e c e m b e r 1 9 9 8 a b s o l u t e m a x i m u m r a t i n g s y m b o l i t e m r a t i n g u n i t n o t e v i n , v o u t i n p u t , o u t p u t v o l t a g e - 0 . 3 ~ v d d + 0 . 3 v 1 v d d , v d d q p o w e r s u p p l y v o l t a g e - 0 . 3 ~ 4 . 6 v 1 t o p r o p e r a t i n g t e m p e r a t u r e 0 ~ 7 0 c 1 t s t g s t o r a g e t e m p e r a t u r e - 5 5 ~ 1 5 0 c 1 t s o l d e r s o l d e r i n g t e m p e r a t u r e ( 1 0 s ) 2 6 0 c 1 p d p o w e r d i s s i p a t i o n 1 w 1 i o u t s h o r t c i r c u i t o u t p u t c u r r e n t 5 0 m a 1 r e c o m m e n d e d d . c . o p e r a t i n g c o n d i t i o n s ( t a = 0 ~ 7 0 c ) s y m b o l p a r a m e t e r m i n . t y p . m a x . u n i t n o t e v d d p o w e r s u p p l y v o l t a g e 3 . 0 3 . 3 3 . 6 v 2 v d d q p o w e r s u p p l y v o l t a g e ( f o r i / o b u f f e r ) 3 . 0 3 . 3 3 . 6 v 2 v i h l v t t l i n p u t h i g h v o l t a g e 2 . 0 ?e v d d + 0 . 3 v 2 v i l l v t t l i n p u t l o w v o l t a g e - 0 . 3 ?e 0 . 8 v 2 c a p a c i t a n c e ( v d d = 3 . 3 v , f = 1 m h z , t a = 2 5 c ) s y m b o l p a r a m e t e r m i n . m a x . u n i t c i i n p u t c a p a c i t a n c e ?e 5 p f c i / o i n p u t / o u t p u t c a p a c i t a n c e ?e 7 p f n o t e : t h e s e p a r a m e t e r s a r e p e r i o d i c a l l y s a m p l e d a n d a r e n o t 1 0 0 % t e s t e d . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 0 d e c e m b e r 1 9 9 8 r e c o m m e n d e d d . c . o p e r a t i n g c o n d i t i o n s ( v d d = 3 . 3 v 0 . 3 v , t a = 0 ~ 7 0 c ) - 5 5 / 6 / 7 / 8 / 1 0 d e s c r i p t i o n / t e s t c o n d i t i o n s y m b o l m a x . u n i t n o t e o p e r a t i n g c u r r e n t t r c 3 t r c ( m i n ) , o u t p u t s o p e n 1 b a n k o p e r a t i o n i d d 1 2 0 0 / 1 9 0 / 1 8 0 / 1 6 0 / 1 3 0 3 a d d r e s s c h a n g e d o n c e d u r i n g t c k ( m i n ) . b u r s t l e n g t h = 2 2 b a n k i n t e r l e a v e o p e r a t i o n i d d 1 b 2 9 0 / 2 7 0 / 2 5 0 / 2 2 5 / 1 8 0 3 p r e c h a r g e s t a n d b y c u r r e n t i n n o n - p o w e r d o w n m o d e t c k = t c k ( m i n ) , c s # 3 v i h , c k e 3 v i l ( m a x ) i n p u t s i g n a l s a r e c h a n g e d o n c e d u r i n g 3 0 n s . i d d 2 n 1 1 0 / 9 0 / 8 5 / 7 5 / 6 0 3 p r e c h a r g e s t a n d b y c u r r e n t i n n o n - p o w e r d o w n m o d e t c k = , c k e 3 v i l ( m a x ) , i n p u t s i g n a l s a r e s t a b l e . i d d 2 n s 6 0 / 5 0 / 4 5 / 4 0 / 3 0 p r e c h a r g e s t a n d b y c u r r e n t i n p o w e r d o w n m o d e t c k = t c k ( m i n ) , c k e v i l ( m a x ) i d d 2 p 3 3 p r e c h a r g e s t a n d b y c u r r e n t i n p o w e r d o w n m o d e t c k = , c k e v i l ( m a x ) i d d 2 p s 3 m a a c t i v e s t a n d b y c u r r e n t i n p o w e r d o w n m o d e c k e v i l ( m a x ) , t c k = t c k ( m i n ) i d d 3 p 1 8 / 1 3 / 1 0 / 9 / 7 3 a c t i v e s t a n d b y c u r r e n t i n n o n - p o w e r d o w n m o d e c k e 3 v i l ( m a x ) , t c k = t c k ( m i n ) i d d 3 n 1 0 0 / 9 0 / 8 0 / 7 0 / 5 5 o p e r a t i n g c u r r e n t ( b u r s t m o d e ) t c k = t c k ( m i n ) , o u t p u t s o p e n , m u l t i - b a n k i n t e r l e a v e , g a p l e s s d a t a i d d 4 3 0 0 / 2 8 0 / 2 6 5 / 2 5 0 / 2 0 0 3 , 4 r e f r e s h c u r r e n t t r c 3 t r c ( m i n ) i d d 5 1 3 0 / 1 2 5 / 1 2 0 / 1 1 5 / 1 1 0 3 s e l f r e f r e s h c u r r e n t c k e 0 . 2 v i d d 6 3 o p e r a t i n g c u r r e n t ( b l o c k w r i t e ) t c k = t c k ( m i n ) , o u t p u t s o p e n , t b w c = t b w c ( m i n ) . i d d 7 2 5 0 / 2 4 0 / 2 3 5 / 2 3 0 / 2 2 0 p a r a m e t e r d e s c r i p t i o n m i n . m a x . u n i t n o t e i i l i n p u t l e a k a g e c u r r e n t ( 0 v v i n v d d , a l l o t h e r p i n s n o t u n d e r t e s t = 0 v ) - 5 5 m a i o l o u t p u t l e a k a g e c u r r e n t o u t p u t d i s a b l e , 0 v v o u t v d d q ) - 5 5 m a v o h l v t t l o u t p u t " h " l e v e l v o l t a g e ( i o u t = - 2 m a ) 2 . 4 ?e v v o l l v t t l o u t p u t " l " l e v e l v o l t a g e ( i o u t = 2 m a ) ?e 0 . 4 v etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 1 d e c e m b e r 1 9 9 8 e l e c t r i c a l c h a r a c t e r i s t i c s a n d r e c o m m e n d e d a . c . o p e r a t i n g c o n d i t i o n s ( v d d = 3 . 3 v ? 0 . 3 v , t a = 0 ~ 7 0 c ) ( n o t e : 5 , 6 , 7 , 8 ) - 5 5 / 6 / 7 / 8 / 1 0 s y m b o l a . c . p a r a m e t e r m i n . m a x . u n i t n o t e t r c r o w c y c l e t i m e ( s a m e b a n k ) 4 8 / 5 4 / 6 3 / 7 2 / 9 0 9 t r c d r a s # t o c a s # d e l a y ( s a m e b a n k ) 1 6 / 1 6 / 1 6 / 1 6 / 3 0 9 t r p p r e c h a r g e t o r e f r e s h / r o w a c t i v a t e c o m m a n d ( s a m e b a n k ) 1 6 / 1 6 / 1 6 / 1 6 / 3 0 9 t r r d r o w a c t i v a t e t o r o w a c t i v a t e d e l a y ( d i f f e r e n t b a n k s ) 1 1 / 1 2 / 1 4 / 1 6 / 2 0 9 t r a s r o w a c t i v a t e t o p r e c h a r g e t i m e ( s a m e b a n k ) 3 2 / 3 6 / 4 2 / 4 8 / 6 0 1 0 0 , 0 0 0 t w r w r i t e r e c o v e r y t i m e 5 . 5 / 6 / 7 / 8 / 1 0 n s t c k 1 c l * = 1 1 9 / 2 0 / 2 0 / 2 0 / 3 0 t c k 2 c l o c k c y c l e t i m e c l * = 2 7 / 7 . 5 / 8 / 8 / 1 5 1 0 t c k 3 c l * = 3 5 . 5 / 6 / 7 / 8 / 1 0 t c h c l o c k h i g h t i m e 2 / 2 / 2 . 5 / 3 / 3 . 5 1 1 t c l c l o c k l o w t i m e 2 / 2 / 2 . 5 / 3 / 3 . 5 1 1 t a c 1 a c c e s s t i m e f r o m c l k c l * = 1 7 / 8 / 1 3 / 1 8 / 2 7 t a c 2 ( p o s i t i v e e d g e ) c l * = 2 5 . 5 / 6 / 6 . 5 / 7 / 1 2 1 1 t a c 3 c l * = 3 5 / 5 / 5 . 5 / 6 . 5 / 7 . 5 t c c d c a s # t o c a s # d e l a y t i m e 1 c y c l e t o h d a t a o u t p u t h o l d t i m e 2 / 2 / 2 / 2 / 3 1 0 t l z d a t a o u t p u t l o w i m p e d a n c e 1 / 1 / 1 / 2 / 2 t h z d a t a o u t p u t h i g h i m p e d a n c e 3 . 5 / 4 / 5 / 6 / 8 8 t i s d a t a / a d d r e s s / c o n t r o l i n p u t s e t - u p t i m e 2 / 2 / 2 / 2 . 5 / 3 1 1 t i h d a t a / a d d r e s s / c o n t r o l i n p u t h o l d t i m e 1 1 1 t s r x m i n i m u m c k e " h i g h " f o r s e l f r e f r e s h e x i t 5 . 5 / 6 / 7 / 8 / 1 0 n s t p d e p o w e r d o w n e x i t s e t - u p t i m e 3 . 5 / 4 / 5 / 6 / 8 1 1 t r s c ( s p e c i a l ) m o d e r e g i s t e r s e t c y c l e t i m e 5 . 5 / 6 / 7 / 8 / 1 0 9 t b w c b l o c k w r i t e c y c l e t i m e 1 1 / 1 2 / 1 4 / 1 6 / 2 0 t b p l b l o c k w r i t e t o p r e c h a r g e c o m m a n d p e r i o d 1 1 / 1 2 / 1 4 / 1 6 / 2 0 t r e f r e f r e s h t i m e 3 2 m s * c l i s c a s # l a t e n c y . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 2 d e c e m b e r 1 9 9 8 n o t e : 1 . s t r e s s g r e a t e r t h a n t h o s e l i s t e d u n d e r " a b s o l u t e m a x i m u m r a t i n g s " m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i c e . 2 . a l l v o l t a g e s a r e r e f e r e n c e d t o v s s . 3 . t h e s e p a r a m e t e r s d e p e n d o n t h e c y c l e r a t e a n d t h e s e v a l u e s a r e m e a s u r e d b y t h e c y c l e r a t e u n d e r t h e m i n i m u m v a l u e o f t c k a n d t r c . i n p u t s i g n a l s a r e c h a n g e d o n e t i m e d u r i n g t c k . 4 . t h e s e p a r a m e t e r s d e p e n d o n t h e o u t p u t l o a d i n g . s p e c i f i e d v a l u e s a r e o b t a i n e d w i t h t h e o u t p u t o p e n . 5 . p o w e r - u p s e q u e n c e i s d e s c r i b e d i n n o t e 1 0 . 6 . a . c . t e s t c o n d i t i o n s l v t t l i n t e r f a c e r e f e r e n c e l e v e l o f o u t p u t s i g n a l s 1 . 4 v / 1 . 4 v o u t p u t l o a d r e f e r e n c e t o t h e u n d e r o u t p u t l o a d ( b ) i n p u t s i g n a l l e v e l s 2 . 4 v / 0 . 4 v t r a n s i t i o n t i m e ( r i s e a n d f a l l ) o f i n p u t s i g n a l s 1 n s r e f e r e n c e l e v e l o f i n p u t s i g n a l s 1 . 4 v 3 . 3 v 1 . 2 k w 8 7 0 w 3 0 p f o u t p u t 1 . 4 v 5 0 w o u t p u t 3 0 p f 5 0 w z0= l v t t l d . c . t e s t l o a d ( a ) l v t t l a . c . t e s t l o a d ( b ) 7 . t r a n s i t i o n t i m e s a r e m e a s u r e d b e t w e e n v i h a n d v i l . t r a n s i t i o n ( r i s e a n d f a l l ) o f i n p u t s i g n a l s a r e i n a f i x e d s l o p e ( 1 n s ) . 8 . t h z d e f i n e s t h e t i m e i n w h i c h t h e o u t p u t s a c h i e v e t h e o p e n c i r c u i t c o n d i t i o n a n d a r e n o t a t r e f e r e n c e l e v e l s . 9 . t h e s e p a r a m e t e r s a c c o u n t f o r t h e n u m b e r o f c l o c k c y c l e a n d d e p e n d o n t h e o p e r a t i n g f r e q u e n c y o f t h e c l o c k a s f o l l o w s : t h e n u m b e r o f c l o c k c y c l e s = s p e c i f i e d v a l u e o f t i m i n g / c l o c k c y c l e t i m e ( c o u n t f r a c t i o n s a s a w h o l e n u m b e r ) 1 0 . i f c l o c k r i s i n g t i m e i s l o n g e r t h a n 1 n s , ( t r / 2 - 0 . 5 ) n s s h o u l d b e a d d e d t o t h e p a r a m e t e r . 1 1 . a s s u m e d i n p u t r i s e a n d f a l l t i m e t t ( t r & t f ) = 1 n s i f t r o r t f i s l o n g e r t h a n 1 n s , t r a n s i e n t t i m e c o m p e n s a t i o n s h o u l d b e c o n s i d e r e d , i . e . , [ ( t r + t f ) / 2 - 1 ] n s s h o u l d b e a d d e d t o t h e p a r a m e t e r . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 3 d e c e m b e r 1 9 9 8 1 2 . p o w e r u p s e q u e n c e p o w e r u p m u s t b e p e r f o r m e d i n t h e f o l l o w i n g s e q u e n c e . 1 ) p o w e r m u s t b e a p p l i e d t o v d d a n d v d d q ( s i m u l t a n e o u s l y ) w h e n a l l i n p u t s i g n a l s a r e h e l d " n o p " s t a t e a n d b o t h c k e = " h " a n d d q m = " h . " t h e c l k s i g n a l s m u s t b e s t a r t e d a t t h e s a m e t i m e . 2 ) a f t e r p o w e r - u p , a p a u s e o f 2 0 0 m s e c o n d s m i n i m u m i s r e q u i r e d . t h e n , i t i s r e c o m m e n d e d t h a t d q m i s h e l d " h i g h " ( v d d l e v e l s ) t o e n s u r e d q o u t p u t i s i n h i g h i m p e d a n c e . 3 ) b o t h b a n k s m u s t b e p r e c h a r g e d . 4 ) m o d e r e g i s t e r s e t c o m m a n d m u s t b e a s s e r t e d t o i n i t i a l i z e t h e m o d e r e g i s t e r . 5 ) a m i n i m u m o f 2 a u t o - r e f r e s h d u m m y c y c l e s m u s t b e r e q u i r e d t o s t a b i l i z e t h e i n t e r n a l c i r c u i t r y o f t h e d e v i c e . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 4 d e c e m b e r 1 9 9 8 t i m i n g w a v e f o r m s f i g u r e 1 . a c p a r a m e t e r s f o r w r i t e t i m i n g ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) bs t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 t ch t cl t ck2 t i s t i s t i h be gin a uto pre cha rge bank a be gin a uto pre cha rge ban k b t i s t i h t i s rax rbx rbx cax rbx cbx ray ray cay raz raz rby rby t rcd t dal t rc t i s t i h t wr t rp t rrd ax0 ax1 ax2 ax3 bx0 bx1 bx2 bx3 ay0 ay1 ay2 ay3 activate c om ma nd bank a write with au top rec har ge c om ma nd bank a activate c om ma nd ban k b write with au top rec har ge c om ma nd ban k b activate c om ma nd bank a write c om ma nd bank a pr ec ha rge c om ma nd bank a activate c om ma nd bank a activate c om ma nd ban k b cl k cke c s # r a s # c a s # we # a 9 a 0 - a 8 d q m dq hi-z dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 5 d e c e m b e r 1 9 9 8 f i g u r e 2 . a c p a r a m e t e r s f o r r e a d t i m i n g ( b u r s t l e n g t h = 2 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dq t ch t cl t ck2 t i s t i s t i h be gin a uto pre cha rge ban k b t i h t i h t i s rax rax cax rbx rbx cbx ray ray t rrd t r as t rc t rcd t ac2 t lz t oh t hz ax0 ax1 bx0 bx1 t rp activate c om ma nd bank a r e ad c om ma nd bank a activate c om ma nd ban k b re ad w ith au to p rech arge c om ma nd ban k b pr ec ha rge c om ma nd bank a activate c om ma nd bank a h i -z t ac2 t hz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 6 d e c e m b e r 1 9 9 8 f i g u r e 3 . a u t o r e f r e s h ( c b r ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dsf dq t ck2 rax rax cax t rp t rc ax0 ax1 ax2 ax3 pr ec ha rg ea ll c om ma nd aut oref resh c om ma nd aut oref resh c om ma nd activate c om ma nd bank a r e ad c om ma nd bank a t rc etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 7 d e c e m b e r 1 9 9 8 f i g u r e 4 . p o w e r o n s e q u e n e a n d a u t o r e f r e s h ( c b r ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dq t ck2 high level is reauired minimum of 2 refresh cycles are required h i -z t rp t rc add ress key inp uts m ust be sta ble fo r 200 m s pr ech ar gea ll c om ma nd 1st autoref resh c om ma nd 2n d au to r efre sh c om ma nd mo de r egi ster se t co mma nd any c om ma nd dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 8 d e c e m b e r 1 9 9 8 f i g u r e 5 . s e l f r e f r e s h e n t r y & e x i t c y c l e cl oc k cke c s # r a s # c a s # bs a 0 - a 9 we # dsf d q m t0 t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12 t13 t14 t15 t16 t17 t18 t19 dq * note 1 *not e 2 t i s *not e 3 *not e 4 t rc(m in) *not e 7 *not e 5 *not e 6 *not e 8 *no te 8 h i -z h i -z sel f refr esh en ter self refresh exit aut oref resh t s rx t pde n o t e : t o e n t e r s e l f r e f r e s h m o d e 1 . c s # , r a s # & c a s # w i t h c k e s h o u l d b e l o w a t t h e s a m e c l o c k c y c l e . 2 . a f t e r 1 c l o c k c y c l e , a l l t h e i n p u t s i n c l u d i n g t h e s y s t e m c l o c k c a n b e d o n ' t c a r e e x c e p t f o r c k e . 3 . t h e d e v i c e r e m a i n s i n s e l f r e f r e s h m o d e a s l o n g a s c k e s t a y s " l o w " . o n c e t h e d e v i c e e n t e r s s e l f r e f r e s h m o d e , m i n i m u m t r a s i s r e q u i r e d b e f o r e e x i t f r o m s e l f r e f r e s h . n o t e : t o e x i t s e l f r e f r e s h m o d e 4 . s y s t e m c l o c k r e s t a r t a n d b e s t a b l e b e f o r e r e t u r n i n g c k e h i g h . 5 . e n a b l e c k e a n d c k e s h o u l d b e s e t h i g h f o r m i n i m u m t i m e o f t s r x . 6 . c s # s t a r t s f r o m h i g h . 7 . m i n i m u m t r c i s r e q u i r e d a f t e r c k e g o i n g h i g h t o c o m p l e t e s e l f r e f r e s h e x i t . 8 . 2 0 4 8 c y c l e s o f b u r s t a u t o r e f r e s h i s r e q u i r e d b e f o r e s e l f r e f r e s h e n t r y a n d a f t e r s e l f r e f r e s h e x i t i f t h e s y s t e m u s e s b u r s t r e f r e s h . etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 2 9 d e c e m b e r 1 9 9 8 f i g u r e 6 . 1 . c l o c k s u s p e n s i o n d u r i n g b u r s t r e a d ( u s i n g c k e ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dq t ck1 rax rax cax h i -z ax0 ax1 ax2 ax3 activate c om ma nd bank a r e ad c om ma nd bank a cl oc k su sp en d 1 cyc le cl oc k su sp en d 2 cycl es cl oc k su sp en d 3 cycl es t hz dsf n o t e : c k e t o c l k d i s a b l e / e n a b l e = 1 c l o c k etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 0 d e c e m b e r 1 9 9 8 f i g u r e 6 . 2 . c l o c k s u s p e n s i o n d u r i n g b u r s t r e a d ( u s i n g c k e ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dq t ck2 rax rax cax h i -z ax0 ax1 ax2 ax3 activate c om ma nd bank a r e ad c om ma nd bank a cl oc k su sp en d 1 cyc le cl oc k su sp en d 2 cycl es cl oc k su sp en d 3 cycl es t hz dsf n o t e : c k e t o c l k d i s a b l e / e n a b l e = 1 c l o c k etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 1 d e c e m b e r 1 9 9 8 f i g u r e 6 . 3 . c l o c k s u s p e n s i o n d u r i n g b u r s t r e a d ( u s i n g c k e ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dq t ck3 rax rax cax h i -z ax0 ax1 ax2 ax3 activate c om ma nd bank a r e ad c om ma nd bank a cl oc k su sp en d 1 cyc le cl oc k su sp en d 2 cycl es cl oc k su sp en d 3 cycl es t hz dsf t 2 n o t e : c k e t o c l k d i s a b l e / e n a b l e = 1 c l o c k etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 2 d e c e m b e r 1 9 9 8 f i g u r e 7 . 1 . c l o c k s u s p e n s i o n d u r i n g b u r s t w r i t e ( u s i n g c k e ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dq t ck1 rax rax cax h i -z dax0 activate c om ma nd bank a write c om ma nd bank a cl oc k su sp en d 2 cycl es cl oc k su sp en d 3 cycl es dax1 dax2 dax3 cl oc k su sp en d 1 cyc le dsf n o t e : c k e t o c l k d i s a b l e / e n a b l e = 1 c l o c k etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 3 d e c e m b e r 1 9 9 8 f i g u r e 7 . 2 . c l o c k s u s p e n s i o n d u r i n g b u r s t w r i t e ( u s i n g c k e ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dq t ck2 rax rax cax h i -z dax0 activate c om ma nd bank a write c om ma nd bank a cl oc k su sp en d 2 cycl es cl oc k su sp en d 3 cycl es dax1 dax2 dax3 cl oc k su sp en d 1 cyc le dsf n o t e : c k e t o c l k d i s a b l e / e n a b l e = 1 c l o c k etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 4 d e c e m b e r 1 9 9 8 f i g u r e 7 . 3 . c l o c k s u s p e n s i o n d u r i n g b u r s t w r i t e ( u s i n g c k e ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 - a 8 d q m dq dax0 dax1 dax2 dax3 t ck3 rax rax cax h i -z activate c om ma nd bank a write c om ma nd bank a cl oc k su sp en d 2 cycl es cl oc k su sp en d 3 cycl es cl oc k su sp en d 1 cyc le dsf n o t e : c k e t o c l k d i s a b l e / e n a b l e = 1 c l o c k etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 5 d e c e m b e r 1 9 9 8 f i g u r e 8 . p o w e r d o w n m o d e a n d c l o c k m a s k ( b u r s t l e n g h t = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # bs a 9 a 0 ~ a 8 d q m dq t ck2 t i s t pde rax rax cax t hz ax3 ax2 ax1 ax0 activate c om ma nd bank a po we r d own mode entry po we r d own mode exit r e ad c om ma nd bank a cloc k mask start cloc k mask e n d pr ec ha rge c om ma nd bank a po we r d own mode entry pre char ge stan dby any c om ma nd po we r d own mode exit h i -z val id active stan dby etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 6 d e c e m b e r 1 9 9 8 f i g u r e 9 . 1 . r a n d o m c o l u m n r e a d ( p a g e w i t h i n s a m e b a n k ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd bank a r e ad c om ma nd bank a r e ad c om ma nd bank a pr ec ha rge c om ma nd bank a aw0 aw1 aw2 aw3 ax0 ax1 ay0 ay1 ay2 ay3 raw raw caw cax cay r e ad c om ma nd bank a h i -z caz az0 az1 az2 az3 r e ad c om ma nd bank a activate c om ma nd bank a raz raz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 7 d e c e m b e r 1 9 9 8 f i g u r e 9 . 2 . r a n d o m c o l u m n r e a d ( p a g e w i t h i n s a m e b a n k ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd bank a r e ad c om ma nd bank a r e ad c om ma nd bank a pr ec ha rge c om ma nd bank a aw0 aw1 aw2 aw3 ax0 ax1 ay0 ay1 ay2 ay3 raw raw caw cax cay r e ad c om ma nd bank a h i -z caz az0 az1 az2 az3 r e ad c om ma nd bank a activate c om ma nd bank a raz raz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 8 d e c e m b e r 1 9 9 8 f i g u r e 9 . 3 . r a n d o m c o l u m n r e a d ( p a g e w i t h i n s a m e b a n k ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd bank a r e ad c om ma nd bank a r e ad c om ma nd bank a pr ec ha rge c om ma nd bank a aw0 aw1 aw2 aw3 ax0 ax1 ay0 ay1 ay2 ay3 raw raw caw cax cay r e ad c om ma nd bank a h i -z caz r e ad c om ma nd bank a activate c om ma nd bank a raz raz az0 dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 3 9 d e c e m b e r 1 9 9 8 f i g u r e 1 0 . 1 . r a n d o m c o l u m n w r i t e ( p a g e w i t h i n s a m e b a n k ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd bank a write c om ma nd bank a write c om ma nd ban k b pr ec ha rge c om ma nd ban k b db w0 db w1 db w2 db w3 dbx0 dbx1 db y0 db y1 db y2 db y3 rb w rb w cb w cbx cby write c om ma nd ban k b h i -z cbz db z0 db z1 db z2 db z3 write c om ma nd ban k b activate c om ma nd ban k b rbz rbz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 0 d e c e m b e r 1 9 9 8 f i g u r e 1 0 . 2 . r a n d o m c o l u m n w r i t e ( p a g e w i t h i n s a m e b a n k ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd bank a write c om ma nd ban k b write c om ma nd ban k b pr ec ha rge c om ma nd ban k b db w0 db w1 db w2 db w3 dbx0 dbx1 db y0 db y1 db y2 db y3 rb w rb w cb w cbx cby write c om ma nd ban k b h i -z cbz db z0 db z1 db z2 db z3 write c om ma nd ban k b activate c om ma nd ban k b rbz rbz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 1 d e c e m b e r 1 9 9 8 f i g u r e 1 0 . 3 . r a n d o m c o l u m n w r i t e ( p a g e w i t h i n s a m e b a n k ) ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd bank a write c om ma nd ban k b write c om ma nd ban k b pr ec ha rge c om ma nd ban k b db w0 db w1 db w2 db w3 dbx0 dbx1 db y0 db y1 db y2 db y3 rb w rb w cb w cbx cby write c om ma nd ban k b h i -z cbz db z0 db z1 write c om ma nd ban k b activate c om ma nd ban k b rbz rbz dsf db z2 etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 2 d e c e m b e r 1 9 9 8 f i g u r e 1 1 . 1 . r a n d o m r o w r e a d ( i n t e r l e a v i n g b a n k s ) ( b u r s t l e n g t h = 8 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd ban k b activate c om ma nd bank a pr ec ha rge c om ma nd ban k b bx0 bx1 bx2 bx3 bx4 bx5 bx6 bx7 ax0 ax1 rbx rbx rby r e ad c om ma nd ban k b h i -z cby r e ad c om ma nd ban k b pr ec ha rge c om ma nd bank a high rax r e ad c om ma nd bank a activate c om ma nd ban k b by0 by1 by2 ax2 ax3 ax4 ax5 ax6 ax7 cbx cax rax rby dsf t rcd t ac1 t rp etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 3 d e c e m b e r 1 9 9 8 f i g u r e 1 1 . 2 . r a n d o m r o w r e a d ( i n t e r l e a v i n g b a n k s ) ( b u r s t l e n g t h = 8 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd ban k b activate c om ma nd bank a pr ec ha rge c om ma nd ban k b bx0 bx1 bx2 bx3 bx4 bx5 bx6 bx7 ax0 ax1 rbx rbx rby r e ad c om ma nd ban k b h i -z cby r e ad c om ma nd ban k b high rax r e ad c om ma nd bank a activate c om ma nd ban k b by0 by1 ax2 ax3 ax4 ax5 ax6 ax7 cbx cax rax rby t rcd t ac2 t rp dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 4 d e c e m b e r 1 9 9 8 f i g u r e 1 1 . 3 . r a n d o m r o w r e a d ( i n t e r l e a v i n g b a n k s ) ( b u r s t l e n g t h = 8 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd ban k b activate c om ma nd bank a pr ec ha rge c om ma nd ban k b bx0 bx1 bx2 bx3 bx4 bx5 bx6 bx7 ax0 ax1 rbx rbx rby r e ad c om ma nd ban k b h i -z cby r e ad c om ma nd ban k b high rax r e ad c om ma nd bank a activate c om ma nd ban k b ax7 by0 ax2 ax3 ax4 ax5 ax6 cbx cax rax rby t rcd t ac3 t rp pr ec ha rge c om ma nd bank a dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 5 d e c e m b e r 1 9 9 8 f i g u r e 1 2 . 1 . r a n d o m r o w w r i t e ( i n t e r l e a v i n g b a n k s ) ( b u r s t l e n g t h = 8 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd bank a activate c om ma nd ban k b pr ec ha rge c om ma nd bank a dax0 dax1 dax2 dax3 dax4 dax5 dax6 dax7 dbx0 dbx1 rax rax ray write c om ma nd bank a h i -z cay high rbx pr ec ha rge c om ma nd ban k b dbx7 day3 dbx2 dbx3 dbx4 dbx5 dbx6 cax cbx rbx ray t rcd day0 day1 day2 write c om ma nd bank a write c om ma nd ban k b activate c om ma nd bank a t rp t wr dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 6 d e c e m b e r 1 9 9 8 f i g u r e 1 2 . 2 . r a n d o m r o w w r i t e ( i n t e r l e a v i n g b a n k s ) ( b u r s t l e n g t h = 8 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd bank a activate c om ma nd ban k b pr ec ha rge c om ma nd bank a dax0 dax1 dax2 dax3 dax4 dax5 dax6 dax7 dbx0 dbx1 rax rax ray write c om ma nd bank a h i -z cay high rbx pr ec ha rge c om ma nd ban k b dbx7 dbx2 dbx3 dbx4 dbx5 dbx6 cax cbx rbx ray t rcd write c om ma nd bank a write c om ma nd ban k b activate c om ma nd bank a day3 day0 day1 day2 day4 t wr* t rp t wr* dsf * t w r > t w r ( m i n . ) etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 7 d e c e m b e r 1 9 9 8 f i g u r e 1 2 . 3 . r a n d o m r o w w r i t e ( i n t e r l e a v i n g b a n k s ) ( b u r s t l e n g t h = 8 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd bank a activate c om ma nd ban k b pr ec ha rge c om ma nd bank a dax0 dax1 dax2 dax3 dax4 dax5 dax6 dax7 dbx0 dbx1 rax rax ray write c om ma nd bank a h i -z cay high rbx pr ec ha rge c om ma nd ban k b dbx7 dbx2 dbx3 dbx4 dbx5 dbx6 cax cbx rbx ray t rcd write c om ma nd bank a write c om ma nd ban k b activate c om ma nd bank a day3 day0 day1 day2 t wr* t rp t wr* dsf * t w r > t w r ( m i n . ) etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 8 d e c e m b e r 1 9 9 8 f i g u r e 1 3 . 1 . r e a d a n d w r i t e c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd bank a the write data is m asked with a zer o cl ock la ten cy r e ad c om ma nd bank a ax0 ax1 ax2 ax3 day0 day1 h i -z pr ec ha rge c om ma nd ban k b az3 day3 az0 az1 r e ad c om ma nd bank a write c om ma nd bank a the rea d da ta is m asked with a two clock la ten cy rax rax cax cay caz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 4 9 d e c e m b e r 1 9 9 8 f i g u r e 1 3 . 2 . r e a d a n d w r i t e c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd bank a the write data is m asked with a zer o cl ock la ten cy r e ad c om ma nd bank a ax0 ax1 ax2 ax3 day0 day1 h i -z az3 day3 az0 az1 r e ad c om ma nd bank a write c om ma nd bank a the rea d da ta is m asked with a two clock la ten cy rax rax cax cay caz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 0 d e c e m b e r 1 9 9 8 f i g u r e 1 3 . 3 . r e a d a n d w r i t e c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd bank a the write data is m asked with a zer o cl ock la ten cy r e ad c om ma nd bank a ax0 ax1 ax2 ax3 day0 day1 h i -z az3 day3 az0 az1 r e ad c om ma nd bank a write c om ma nd bank a the rea d da ta is m asked with a two clock la ten cy rax rax cax cay caz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 1 d e c e m b e r 1 9 9 8 f i g u r e 1 4 . 1 . i n t e r l e a v i n g c o l u m n r e a d c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd bank a r e ad c om ma nd ban k b pr ec ha rge c om ma nd bank a bw 0 bw 1 bx0 bx1 by1 ay0 h i -z bz0 r e ad c om ma nd bank a r e ad c om ma nd bank a rax rax ax0 ax1 ax2 ax3 by0 ay1 bz1 bz2 bz3 activate c om ma nd ban k b r e ad c om ma nd ban k b r e ad c om ma nd ban k b r e ad c om ma nd ban k b pr ec ha rge c om ma nd ban k b t rcd t ac1 rax rb w rb w cb w cbx cby cay cbz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 2 d e c e m b e r 1 9 9 8 f i g u r e 1 4 . 2 . i n t e r l e a v i n g c o l u m n r e a d c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd bank a r e ad c om ma nd ban k b pr ec ha rge c om ma nd bank a bw 0 bw 1 bx0 bx1 by1 ay0 h i -z bz0 r e ad c om ma nd bank a r e ad c om ma nd bank a rax rax ax0 ax1 ax2 ax3 by0 ay1 bz1 bz2 bz3 activate c om ma nd ban k b r e ad c om ma nd ban k b r e ad c om ma nd ban k b r e ad c om ma nd ban k b pr ec ha rge c om ma nd ban k b t rcd t ac2 cay rax rax cb w cbx cby cay cbz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 3 d e c e m b e r 1 9 9 8 f i g u r e 1 4 . 3 . i n t e r l e a v e d c o l u m n r e a d c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd bank a pr ec ha er ge c om ma nd ban k b bx0 bx1 by0 by1 bz1 ay0 h i -z ay2 r e ad c om ma nd bank a r e ad c om ma nd bank a rax rax ax0 ax1 ax2 ax3 bz0 ay1 ay3 activate c om ma nd ban k b r e ad c om ma nd ban k b r e ad c om ma nd ban k b r e ad c om ma nd ban k b pr ec ha rge c om ma nd bank a t rcd t ac3 cax rbx rbx cbx cby cbz cay dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 4 d e c e m b e r 1 9 9 8 f i g u r e 1 5 . 1 . i n t e r l e a v e d c o l u m n w r i t e c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd bank a write c om ma nd ban k b db w0 db w1 dbx0 dbx1 db y1 day0 h i -z write c om ma nd bank a pr ec ha rge c om ma nd bank a rax rax dax0 dax1 dax2 dax3 db y0 day1 db z0 activate c om ma nd ban k b write c om ma nd ban k b write c om ma nd ban k b write c om ma nd bank a pr ec ha rge c om ma nd ban k b t rcd cax rb w rb w cb w cbx cby cay db z1 db z2 db z3 write c om ma nd ban k b t rrd t rp t wr t rp cbz t6 dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 5 d e c e m b e r 1 9 9 8 f i g u r e 1 5 . 2 . i n t e r l e a v e d c o l u m n w r i t e c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # dsf a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd bank a write c om ma nd ban k b db w0 db w1 dbx0 dbx1 db y1 day0 h i -z write c om ma nd bank a pr ec ha rge c om ma nd bank a rax rax dax0 dax1 dax2 dax3 db y0 day1 db z0 activate c om ma nd ban k b write c om ma nd ban k b write c om ma nd ban k b write c om ma nd bank a pr ec ha rge c om ma nd ban k b t rcd cax rb w rb w cb w cbx cby cay db z1 db z2 db z3 write c om ma nd ban k b t rrd t rp t wr t rp cbz we # etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 6 d e c e m b e r 1 9 9 8 f i g u r e 1 5 . 3 . i n t e r l e a v e d c o l u m n w r i t e c y c l e ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # dsf a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd bank a write c om ma nd ban k b db w0 db w1 dbx0 dbx1 db y1 day0 h i -z write c om ma nd bank a pr ec ha rge c om ma nd bank a rax rax dax0 dax1 dax2 dax3 db y0 day1 db z0 activate c om ma nd ban k b write c om ma nd ban k b write c om ma nd ban k b write c om ma nd bank a pr ec ha rge c om ma nd ban k b t rcd cax rb w rb w cb w cbx cby cay db z1 db z2 db z3 write c om ma nd ban k b t rrd > t rrd(min) t rp t wr t wr(min) cbz we # etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 7 d e c e m b e r 1 9 9 8 f i g u r e 1 6 . 1 . a u t o p r e c h a r g e a f t e r r e a d b u r s t ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd bank a activate c om ma nd ban k b bx0 bx1 bx2 bx3 ay1 ay2 h i -z r e ad c om ma nd bank a rax rax rbx ax0 ax1 ax2 ax3 ay0 ay3 by0 activate c om ma nd ban k b activate c om ma nd ban k b rbx cbx cay rby cby by1 by2 by3 rbz high bz0 bz1 bz2 bz3 re ad w ith au to p rech arge c om ma nd ban k b re ad w ith au to p rech arge c om ma nd bank a re ad w ith au to p rech arge c om ma nd ban k b re ad w ith au to p rech arge c om ma nd ban k b cax rby rbz cbz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 8 d e c e m b e r 1 9 9 8 f i g u r e 1 6 . 2 . a u t o p r e c h a r g e a f t e r r e a d b u r s t ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd bank a activate c om ma nd bank a bx0 bx1 bx2 bx3 ay1 ay2 h i -z r e ad c om ma nd bank a rax rax rbx ax0 ax1 ax2 ax3 ay0 ay3 by0 activate c om ma nd ban k b activate c om ma nd ban k b rbx cbx rby ray cby by1 by2 by3 high az0 az1 az2 re ad w ith au to p rech arge c om ma nd ban k b re ad w ith au to p rech arge c om ma nd bank a re ad w ith au to p rech arge c om ma nd ban k b re ad w ith au to p rech arge c om ma nd bank a cax rby raz caz raz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 5 9 d e c e m b e r 1 9 9 8 f i g u r e 1 6 . 3 . a u t o p r e c h a r g e a f t e r r e a d b u r s t ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # dsf a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd bank a bx0 bx1 bx2 bx3 ay1 ay2 h i -z r e ad c om ma nd bank a rax rax rbx ax0 ax1 ax2 ax3 ay0 ay3 by0 activate c om ma nd ban k b activate c om ma nd ban k b rbx cbx by1 by2 by3 high re ad w ith au to p rech arge c om ma nd ban k b re ad w ith au to p rech arge c om ma nd bank a re ad w ith au to p rech arge c om ma nd ban k b cax rby cby rby cay we # etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 0 d e c e m b e r 1 9 9 8 f i g u r e 1 7 . 1 . a u t o p r e c h a r g e a f t e r w r i t e b u r s t ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 activate c om ma nd bank a dbx0 dbx1 dbx2 dbx3 day1 day2 h i -z write c om ma nd bank a rax rax rbx dax0 dax1 dax2 dax3 day0 day3 db y0 activate c om ma nd ban k b activate c om ma nd ban k b cbx cay db y1 db y2 db y3 high write with au to p rech arge c om ma nd ban k b write with au to p rech arge c om ma nd bank a write with au to p rech arge c om ma nd ban k b rby caz cby rby daz0 daz0 activate c om ma nd bank a write with au to p rech arge c om ma nd bank a daz0 daz0 cax rbx raz raz t 1 1 we # etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 1 d e c e m b e r 1 9 9 8 f i g u r e 1 7 . 2 . a u t o p r e c h a r g e a f t e r w r i t e b u r s t ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 activate c om ma nd bank a dbx0 dbx1 dbx2 dbx3 day1 day2 h i -z write c om ma nd bank a rax rax rbx dax0 dax1 dax2 dax3 day0 day3 db y0 activate c om ma nd ban k b activate c om ma nd ban k b cbx cay db y1 db y2 db y3 high write with au to p rech arge c om ma nd ban k b write with au to p rech arge c om ma nd bank a write with au to p rech arge c om ma nd ban k b rby cby rby daz0 daz1 activate c om ma nd bank a write with au to p rech arge c om ma nd bank a daz2 daz3 cax rbx caz raz raz we # etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 2 d e c e m b e r 1 9 9 8 f i g u r e 1 7 . 3 . a u t o p r e c h a r g e a f t e r w r i t e b u r s t ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck3 activate c om ma nd bank a dbx0 dbx1 dbx2 dbx3 day1 day2 h i -z write c om ma nd bank a rax rax rbx dax0 dax1 dax2 dax3 day0 day3 db y0 activate c om ma nd ban k b activate c om ma nd ban k b cbx db y1 db y2 db y3 high write with au to p rech arge c om ma nd ban k b write with au to p rech arge c om ma nd bank a write with au to p rech arge c om ma nd ban k b cay cax rbx cby rby rby ` dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 3 d e c e m b e r 1 9 9 8 f i g u r e 1 8 . 1 . f u l l p a g e r e a d c y c l e ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs activate c om ma nd bank a a x ax +1 bx bx +1 bx +3 bx +4 h i -z r e ad c om ma nd bank a rax rax rbx ax +1 ax +2 ax-2 ax-1 bx +2 bx +5 activate c om ma nd ban k b burst stop c om ma nd cbx high r e ad c om ma nd ban k b pr ec ha rge c om ma nd ban k b cax rbx rby rby a x bx +6 bx +7 the bur st co unte r wr aps fro m th e hi ghes t or der pa ge a ddre ss back to zero du ring th is t ime in terv al fu ll pag e bu rst op era tio n d oes not ter mina te w hen the burst len gth is s atis fied; th e bu rst co unte r i ncre men ts a nd con tinu es bu rst in g b egi nni ng wi th the s tar tin g a dd res s. activate c om ma nd ban k b t ck1 t rrd t rp dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 4 d e c e m b e r 1 9 9 8 f i g u r e 1 8 . 2 . f u l l p a g e r e a d c y c l e ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs activate c om ma nd bank a a x ax +1 bx bx +1 bx +3 bx +4 h i -z r e ad c om ma nd bank a rax rax ax +1 ax +2 ax-2 ax-1 bx +2 bx +5 activate c om ma nd ban k b burst stop c om ma nd cbx high r e ad c om ma nd ban k b pr ec ha rge c om ma nd ban k b rbx cax rby rby a x bx +6 the bur st co unte r wr aps fro m th e hi ghes t or der pa ge a ddre ss back to zero du ring th is t ime in terv al fu ll pag e bu rst op era tio n d oes not ter mina te w hen the burst len gth is s atis fied; th e bu rst co unte r i ncre men ts a nd con tinu es bu rst in g b egi nni ng wi th the s tar tin g a dd res s. activate c om ma nd ban k b t ck2 t rp rbx dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 5 d e c e m b e r 1 9 9 8 f i g u r e 1 8 . 3 . f u l l p a g e r e a d c y c l e ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs activate c om ma nd bank a a x ax +1 bx bx +1 bx +3 bx +4 h i -z r e ad c om ma nd bank a rax rax ax +1 ax +2 ax-2 ax-1 bx +2 bx +5 activate c om ma nd ban k b burst stop c om ma nd cbx high r e ad c om ma nd ban k b pr ec ha rge c om ma nd ban k b rbx cax rby rby a x the bur st co unte r wr aps fro m th e hi ghes t or der pa ge a ddre ss back to zero du ring th is t ime in terv al fu ll pag e bu rst op era tio n d oes not te rmin ate whe n t he b urs t le ngt h is sat isfied ; the burs t coun ter in cre me nts an d con tin ues bu rs ti ng b eg in ni ng w it h the sta rtin g ad dres s. activate c om ma nd ban k b t ck3 t rp rbx dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 6 d e c e m b e r 1 9 9 8 f i g u r e 1 9 . 1 . f u l l p a g e w r i t e c y c l e ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs d a x + 1 dax activate c om ma nd bank a h i -z activate c om ma nd ban k b rax rax burst stop c om ma nd cbx high write c om ma nd ban k b pr ec ha rge c om ma nd ban k b rbx cax rby rby the bur st co unte r wr aps fro m th e hi ghes t or der pa ge a ddre ss back to zero du ring th is t ime in terv al fu ll pag e b urs t ope rat ion do es not ter mina te w hen the burst len gth is s atisf ied; the burs t co unter in cre me nts an d con tin ue s b urs ti ng be gin nin g wit h t he sta rt ing ad dre ss. activate c om ma nd ban k b t ck1 d a x + 2 d a x + 3 d a x - 1 dax d a x + 1 dbx d b x + 1 d b x + 2 d b x + 3 d b x + 4 d b x + 5 d b x + 6 d b x + 7 write c om ma nd bank a da ta is ig nor ed rbx dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 7 d e c e m b e r 1 9 9 8 f i g u r e 1 9 . 2 . f u l l p a g e w r i t e c y c l e ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs d a x + 1 dax activate c om ma nd bank a h i -z activate c om ma nd ban k b rax rax burst stop c om ma nd cbx high write c om ma nd ban k b pr ec ha rge c om ma nd ban k b rbx cax rby rby the bur st co unte r wr aps fro m th e hi ghes t or der pa ge a ddre ss back to zero du ring th is t ime in terv al fu ll pag e b urs t ope rat ion do es not ter mina te w hen the burst len gth is s atisf ied; the burs t co unter in cre me nts an d con tin ue s b urs ti ng be gin nin g wit h t he sta rt ing ad dre ss. activate c om ma nd ban k b t ck2 d a x + 2 d a x + 3 d a x - 1 dax d a x + 1 dbx d b x + 1 d b x + 2 d b x + 3 d b x + 4 d b x + 5 d b x + 6 write c om ma nd bank a da ta is ig nor ed rbx dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 8 d e c e m b e r 1 9 9 8 f i g u r e 1 9 . 3 . f u l l p a g e w r i t e c y c l e ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs d a x + 1 dax activate c om ma nd bank a h i -z activate c om ma nd ban k b rax rax burst stop c om ma nd cbx high rbx cax write c om ma nd ban k b pr ec ha rge c om ma nd ban k b rby rby the bur st co unte r wr aps fro m th e hi ghes t or der pa ge a ddre ss back to zero du ring th is t ime in terv al fu ll pag e b urs t ope rat ion do es not ter mina te w hen the burst len gth is s atisf ied; the burs t co unter in cre me nts an d con tin ue s b urs ti ng be gin nin g wit h t he sta rt ing ad dre ss. activate c om ma nd ban k b t ck3 rbx d a x + 2 d a x + 3 d a x - 1 dax d a x + 1 dbx d b x + 1 d b x + 2 d b x + 3 d b x + 4 d b x + 5 write c om ma nd bank a da ta is ig nor ed dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 6 9 d e c e m b e r 1 9 9 8 f i g u r e 2 0 . b y t e w r i t e o p e r a t i o n ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m 0 dqm1~3 bs rax rax cay high cax t ck2 caz activate c om ma nd bank a r e ad c om ma nd bank a upp er 3 bytes ar e ma sked write c om ma nd bank a upp er 3 bytes ar e ma sked r e ad c om ma nd bank a lowe r byte is mask ed lowe r byte is mask ed lowe r byte is mask ed ax0 ax1 ax2 ax1 ax2 ax3 day1 day2 day0 day1 day3 az1 az2 az1 az2 az0 az3 dq0 - dq7 dq8 - dq31 dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 0 d e c e m b e r 1 9 9 8 f i g u r e 2 1 . b u r s t r e a d a n d s i n g l e w r i t e o p e r a t i o n ( b u r s t l e n g t h = 4 , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m 0 dqm1~3 bs rax rax caw high cax t ck2 cay activate c om ma nd bank a r e ad c om ma nd bank a si ngl e w rite c om ma nd bank a si ngl e w rite c om ma nd bank a r e ad c om ma nd bank a lowe r byte is mask ed si ngl e w rite c om ma nd bank a ax0 ax1 ax2 ax1 ax2 ax3 dq w0 ay0 ay1 ay3 ay2 ay0 ay3 ax3 ax0 dq w0 dqx0 az0 az0 lowe r byte is mask ed lowe r byte is mask ed cax caz dq0 - dq7 dq8 - dq31 h i - z h i - z dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 1 d e c e m b e r 1 9 9 8 f i g u r e 2 2 . f u l l p a g e b u r s t r e a d a n d s i n g l e w r i t e o p e r a t i o n ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m 0 dqm1~3 bs rav rav high cav t ck3 cax activate c om ma nd bank a r e ad c om ma nd bank a burst stop c om ma nd si ngl e w rite c om ma nd bank a si ngl e w rite c om ma nd bank a r e ad c om ma nd bank a burst stop c om ma nd av0 av1 av2 av3 ay1 ay3 ay0 ay3 ay1 ay0 av1 av0 av2 ay2 ay2 caw dqx0 dqx0 dq w0 dq w0 av3 cay dq0 - dq7 dq8 - dq31 dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 2 d e c e m b e r 1 9 9 8 f i g u r e 2 3 . r a n d o m r o w r e a d ( i n t e r l e a v i n g b a n k s ) ( b u r s t l e n g t h = 2 , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs high t ck1 b u0 b u1 au 0 au 1 bv0 bv1 av0 av1 bw 0 bw 1 aw0 aw1 bx0 bx1 ax0 ax1 by0 by1 ay0 ay1 bz0 activate c om ma nd ban k b r e ad ban k b wit h auto pr ec ha rge activate c om ma nd bank a r e ad bank a wit h auto pr ec ha rge activate c om ma nd ban k b r e ad ban k b wit h auto pr ec ha rge activate c om ma nd bank a r e ad bank a wit h auto pr ec ha rge activate c om ma nd ban k b r e ad ban k b wit h auto pr ec ha rge activate c om ma nd bank a r e ad bank a wit h auto pr ec ha rge activate c om ma nd ban k b r e ad ban k b wit h auto pr ec ha rge activate c om ma nd bank a r e ad bank a wit h auto pr ec ha rge activate c om ma nd ban k b r e ad ban k b wit h auto pr ec ha rge activate c om ma nd bank a r e ad bank a wit h auto pr ec ha rge activate c om ma nd ban k b r e ad ban k b wit h auto pr ec ha rge activate c om ma nd bank a r bu r bu c bu ra u ra u ca u rbv rbv cbv rav rav cav rb w rb w cb w raw raw caw rbx rbx cbx rax rax cax rby rby cby ray ray cay rbz rbz cbz raz raz t rp t rp t rp t rp t rp t rp t rp t rp t rp t rp be gin au to pr ec ha rge ban k b be gin au to pr ec ha rge bank a be gin au to pr ec ha rge ban k b be gin au to pr ec ha rge bank a be gin au to pr ec ha rge ban k b be gin au to pr ec ha rge bank a be gin au to pr ec ha rge ban k b be gin au to pr ec ha rge bank a be gin au to pr ec ha rge ban k b be gin au to pr ec ha rge bank a dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 3 d e c e m b e r 1 9 9 8 f i g u r e 2 4 . f u l l p a g e r a n d o m c o l u m n r e a d ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 ax0 bx0 ay0 ay1 by0 by1 az0 az1 az2 bz0 bz1 bz2 activate c om ma nd bank a r e ad c om ma nd bank a activate c om ma nd ban k b r e ad c om ma nd ban k b r e ad c om ma nd ban k b r e ad c om ma nd bank a r e ad c om ma nd ban k b pr ec ha rge co mma nd b ank b (p rech arg e te min atio n) t rp r e ad c om ma nd bank a activate c om ma nd ban k b t rrd t rcd rax rax rbx rbx cax cbx cay cby caz cbz rb w rb w dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 4 d e c e m b e r 1 9 9 8 f i g u r e 2 5 . f u l l p a g e r a n d o m c o l u m n w r i t e ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 dax0 dbx0 day0 day1 db y0 db y1 daz0 daz1 daz2 db z0 db z1 db z2 activate c om ma nd bank a write c om ma nd bank a activate c om ma nd ban k b write c om ma nd ban k b write c om ma nd ban k b write c om ma nd bank a write c om ma nd ban k b pr ec ha rge co mma nd b ank b (p rech arg e te min atio n) t rp write c om ma nd bank a activate c om ma nd ban k b t rrd t rcd rax rax rbx rbx cax cbx cay cby caz cbz rb w rb w t wr write data is mask ed dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 5 d e c e m b e r 1 9 9 8 f i g u r e 2 6 . 1 . p r e c h a r g e t e r m i n a t i o n o f a b u r s t ( b u r s t l e n g t h = f u l l p a g e , c a s # l a t e n c y = 1 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck1 dax0 dax1 dax2 dax3 dax4 ay0 ay1 ay2 daz3 daz2 daz0 activate c om ma nd bank a write c om ma nd bank a pr ec ha rge c om ma nd bank a r e ad c om ma nd bank a pr ec ha rge c om ma nd bank a write c om ma nd bank a rax rax ray cax ray cay raz daz1 daz4 daz5 daz6 daz7 pr echa rge te rmin ati on of a write burst. write data is ma sked. activate c om ma nd bank a activate c om ma nd bank a t wr t rp t rp pr ec ha rge ter minat ion of a re ad bur st. raz caz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 6 d e c e m b e r 1 9 9 8 f i g u r e 2 6 . 2 . p r e c h a r g e t e r m i n a t i o n o f a b u r s t ( b u r s t l e n g t h = 8 o r f u l l p a g e , c a s # l a t e n c y = 2 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck2 dax0 dax1 dax2 dax3 ay2 ay0 ay1 activate c om ma nd bank a write c om ma nd bank a pr ec ha rge c om ma nd bank a r e ad c om ma nd bank a pr ec ha rge c om ma nd bank a activate c om ma nd bank a rax rax ray cax ray cay az0 az1 az2 pr echa rge te rmin ati on of a write burst. write data is ma sked. activate c om ma nd bank a t wr t rp t rp raz caz high r e ad c om ma nd bank a pr ec ha rge c om ma nd bank a pr echa rge te rmin ati on of a read b urst t rp raz dsf etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 7 d e c e m b e r 1 9 9 8 f i g u r e 2 6 . 3 . p r e c h a r g e t e r m i n a t i o n o f a b u r s t ( b u r s t l e n g t h = 4 , 8 o r f u l l p a g e , c a s # l a t e n c y = 3 ) t0 t 1 t2 t3 t4 t 5 t6 t 7 t8 t9 t 1 0 t 1 1 t 1 2 t 1 3 t 1 4 t 1 5 t 1 6 t 1 7 t 1 8 t 1 9 t20 t 2 1 t22 cl k cke c s # r a s # c a s # we # a 9 a 0 ~ a 8 d q m dq bs t ck3 dax0 ay0 ay1 ay2 activate c om ma nd bank a write c om ma nd bank a pr echa rge te rmin ati on of a write burst r e ad c om ma nd bank a pr ec ha rge c om ma nd bank a rax rax ray cax ray cay write data is mask ed activate c om ma nd bank a t wr t rp t rp raz raz high activate c om ma nd bank a pr ec ha rge c om ma nd bank a pr echa rge te rmin ati on of a read b urst dsf dax1 etrontech e m 6 3 6 3 2 7 p r e l i m i n a r y 7 8 d e c e m b e r 1 9 9 8 1 0 0 p i n 1 4 x 2 0 m m p a c k a g e o u t l i n e d r a w i n g i n f o r m a t i o n l (l 1) pin #1 se ct ion a - a a a 2 a 1 c b se ati ng pla ne a a e e 1 (e3) d d1 (d3) e q y p a c k a g i n g d i m e n s i o n s u n i t = m m e m 6 3 6 3 2 7 q - x x e m 6 3 6 3 2 7 t q - x x e m 6 3 6 3 2 7 j t - x x s y m b o l d e f i n i t i o n m i n n o r m a l m a x m i n n o r m a l m a x m i n n o r m a l m a x a o v e r a l l h e i g h t 3 . 4 0 1 . 6 0 1 . 2 7 a 1 s t a n d o f f 0 . 2 5 0 . 0 5 0 . 1 0 0 . 1 5 0 . 0 5 0 . 1 0 0 . 1 5 a 2 b o d y t h i c k n e s s 2 . 6 0 2 . 8 0 3 . 0 0 1 . 3 5 1 . 4 0 1 . 4 5 0 . 9 5 1 . 0 0 1 . 1 2 b l e a d w i d t h 0 . 2 2 0 . 3 0 0 . 3 8 0 . 2 2 0 . 3 2 0 . 3 8 0 . 2 5 0 . 3 2 0 . 4 0 c l e a d t h i c k n e s s 0 . 1 3 0 . 1 5 0 . 2 3 0 . 0 9 0 . 2 0 0 . 1 2 0 . 1 4 5 0 . 2 3 d t e r m i n a l d i m e n s i o n 2 2 . 9 5 2 3 . 2 0 2 3 . 4 5 2 1 . 9 0 2 2 . 0 0 2 2 . 1 0 2 3 . 0 0 2 3 . 2 0 2 3 . 4 0 d 1 p a c k a g e b o d y 1 9 . 9 0 2 0 . 0 0 2 0 . 1 0 1 9 . 9 0 2 0 . 0 0 2 0 . 1 0 1 9 . 9 0 2 0 . 0 0 2 0 . 1 0 d 3 r e f e r e n c e 1 8 . 8 5 r e f . 1 8 . 8 5 r e f . 1 8 . 8 5 r e f . e t e r m i n a l d i m e n s i o n 1 6 . 9 5 1 7 . 2 0 1 7 . 4 5 1 5 . 9 0 1 6 . 0 0 1 6 . 1 0 1 7 . 0 0 1 7 . 2 0 1 7 . 4 0 e 1 p a c k a g e b o d y 1 3 . 9 0 1 4 . 0 0 1 4 . 1 0 1 3 . 9 0 1 4 . 0 0 1 4 . 1 0 1 3 . 9 0 1 4 . 0 0 1 4 . 1 0 e 3 r e f e r e n c e 1 2 . 3 5 r e f . 1 2 . 3 5 r e f . 1 2 . 3 5 r e f . e l e a d p i t c h 0 . 6 5 r e f . 0 . 6 5 r e f . 0 . 6 5 r e f . l f o o t l e n g t h 0 . 6 5 0 . 8 0 0 . 9 5 0 . 4 5 0 . 6 0 0 . 7 5 0 . 7 3 0 . 8 8 1 . 0 3 l 1 l e a d l e n g t h 1 . 6 0 r e f . 1 . 0 0 r e f . 1 . 6 0 r e f . y c o p l a n a r i t y 0 . 1 0 0 . 1 0 0 . 1 0 q l e a d a n g l e 0 . 0 0 7 . 0 0 0 . 0 0 7 . 0 0 0 . 0 0 7 . 0 0 |
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