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em4 8 8 m1 6 4 4 vt d ____________________________________________ f e a t u r e ? f u l l y syn ch r o n o u s t o p o si t i ve cl o ck e d g e ? s i n g l e 3 . 3 v + / - 0 . 3 v p o w e r su p p l y ? l v t t l co m p a t i b l e w i t h m u l t i p l e xe d a d d r e ss ? p r o g r a m m a b l e b u r st l e n g t h ( b / l ) - 1 , 2 , 4 , 8 o r f u l l p a g e ? p r o g r a m m a b l e c a s l a t e n cy ( c / l ) - 2 o r 3 ? d a t a m a sk ( d q m ) f o r r e a d / w r i t e m a ski n g ? p r o g r a m m a b l e w r a p se q u e n ce C s e q u e n t i a l ( b / l = 1 / 2 / 4 / 8 / f u l l p a g e ) C i n t e r l e a ve ( b / l = 1 / 2 / 4 / 8 ) ? b u r st r e a d w i t h si n g l e - b i t w r i t e o p e r a t i o n ? a l l i n p u t s a r e sa m p l e d a t t h e r i si n g e d g e o f t h e syst e m cl o ck. ? a u t o r e f r e sh a n d se l f r e f r e sh ? 4 , 0 9 6 r e f r e sh cycl e s / 6 4 m s ( 1 5 . 6 2 5 u s) d e s c r i p t i o n t h e e m 4 8 8 m 1 6 4 4 v t d i s s yn ch r o n o u s d y n a m i c r a n d o m a c c e s s m e m o r y ( s d r a m ) o r g a n i ze d a s 2 m e g w o r d s x 4 b a n ks x 1 6 b i t s . a l l i n p u t s a n d o u t p u t s a r e s y n c h r o n i z e d w i t h t h e p o si t i ve e d g e o f t h e cl o ck. t h e 1 2 8 m b s d r a m u se s syn ch r o n i ze d p i p e l i n e d a r ch i t e ct u r e t o a ch i e ve h i g h s p e e d d a t a t r a n s f e r r a t e s a n d i s d e s i g n e d t o o p e r a t e a t 3 . 3 v l o w p o w e r m e m o r y s y s t e m . i t a l so p r o vi d e s a u t o r e f r e sh w i t h p o w e r sa vi n g / d o w n m o d e . a l l i n p u t s a n d o u t p u t s vo l t a g e l e ve l s a r e co m p a t i b l e w i t h l v t t l . p a cka g e s: t s o p i i 5 4 p 4 0 0 m i l o r d e r i n g i n f o r m a t i o n pa rt no orga niza tion ma x . fre q pa c k a ge powe r pb em4 8 8 m1 6 4 4 vtd C 7 5 f 8 m x1 6 1 3 3 mhz @ cl 3 5 4 p in tsop (ii) co mme rcia l fre e em4 8 8 m1 6 4 4 vtd C 7 f 8 m x1 6 1 4 3 mhz @ cl 3 5 4 p in tsop (ii) co mme rcia l fre e * eorex re se rve s th e rig h t to ch a n g e p ro d u cts o r sp e cifica tio n with o u t n o tice . 1 1 2 8 m b ( 2 m x 4 b a nk x 1 6 ) s y nc hronous d r a m
em4 8 8 m1 6 4 4 vt d ____________________________________________ a b s o l u t e m a x i m u m r a t i n g s sy mbol ite m ra ting units v i n , v o u t in p u t, ou tp u t v o lta g e -0 .3 ~ 4 .6 v v d d , v d d q po we r su p p ly v o lta g e -0 .3 ~ 4 .6 v t o p op e ra tin g t e mp e ra tu re 0 ~ 7 0 c t s t g sto ra g e t e mp e ra tu re -5 5 ~ 1 2 5 c p d po we r dissip a tio n 1 w i o s sh o rt circu it cu rre n t 5 0 ma note : ca u tio n exp o sin g th e d e vice to stre ss a b o ve th o se liste d in ab so lu te ma ximu m ra tin g s co u ld ca u se p e rma n e n t d a ma g e . th e d e vice is n o t me a n t to b e o p e ra te d u n d e r co n d itio n s o u tsid e th e limits d e scrib e d in th e o p e ra tio n a l se ctio n o f th is sp e cifica tio n . exp o su re to ab so lu te ma ximu m ra tin g co n d itio n s fo r e xte n d e d p e rio d s ma y a f fe ct d e vice re lia b ility . r e c o m m e n d e d d c o p e r a t i o n c o n d i t i o n s ( t a = 0 ~ 7 0 c ) sy mbol pa ra me te r min. t y pic a l t y pic a l units v d d po we r su p p ly v o lta g e 3 .0 3 .3 3 .6 v v d d q po we r su p p ly v o lta g e (fo r i/o bu f fe r) 3 .0 3 .3 3 .6 v v i h in p u t lo g ic h ig h vo lta g e 2 .0 v d d + 0 .3 v v i l in p u t lo g ic lo w vo lta g e -0 .3 0 .8 v note : 1 . all vo lta g e re fe rre d to v ss . 2 . v i h (ma x) = 5 .6 v fo r p u lse wid th 3 n s 3 . v i l (min ) = -2 .0 v fo r p u lse wid th 3 n s c a p a c i t a n c e ( v c c = 3 . 3 v , f = 1 m h z, t a = 2 5 c ) sy mbol pa ra me te r min. ma x . units c c l k clo ck ca p a cita n ce 2 .5 3 .5 p f c i in p u t ca p a cita n ce fo r cl k, cke, ad d re ss, /cs, /ras, /cas, /w e, dqml , dqmu 2 .5 3 .8 p f c o in p u t/ou tp u t ca p a cita n ce 4 .0 6 .5 p f 2
em4 8 8 m1 6 4 4 vt d ____________________________________________ 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 ) pa ra me te r sy mbol t e st co n d itio n max units note s ma op e ra tin g cu rre n t i c c 1 bu rst le n g th = 1 , t r c 3 t r c (min ), i o l = 0 ma, on e b a n k a ctive 7 5 ma 1 pre ch a rg e sta n d b y cu rre n t in p o we r d o wn mo d e i c c 2 p cke v i l (ma x.), t c k = 1 5 n s 2 ma i c c 2 p s cke v i l (ma x.), t c k = 1 .5 ma pre ch a rg e sta n d b y cu rre n t in n o n -p o we r d o wn mo d e i c c 2 n cke 3 v i l (min .), t c k = 1 5 n s, /cs 3 v i h (min .) in p u t sig n a ls a re ch a n g e d o n e time d u rin g 3 0 n s 2 0 ma i c c 2 n s cke 3 v i l (min .), t c k = in p u t sig n a ls a re sta b le 1 0 ma active sta n d b y cu rre n t in p o we r d o wn mo d e i c c 3 p cke v i l (ma x), t c k = 1 5 n s 5 ma i c c 3 p s cke v i l (ma x), t c k = 5 ma active sta n d b y cu rre n t in n o n -p o we r d o wn mo d e i c c 3 n cke 3 v i l (min ), t c k = 1 5 n s, /cs 3 v i h (min ) in p u t sig n a ls a re ch a n g e d o n e time d u rin g 3 0 n s 3 5 ma i c c 3 n s cke 3 v i l (min ), t c k = in p u t sig n a ls a re sta b le 2 5 ma o p e ra tin g cu rre n t (bu rst mo d e ) i c c 4 t c c d 3 2 cl ks , i o l = 0 ma 1 1 0 ma 2 re fre sh cu rre n t i c c 5 t r c 3 t r c (min .) 1 6 0 ma 3 se lf re fre sh cu rre n t i c c 6 cke 0 .2 v 2 ma 4 all vo lta g e s re fe re n ce d to vss. note : 1 . i c c 1 d e p e n d s o n o u tp u t lo a d in g a n d cycle ra te s. sp e cifie d va lu e s a re o b ta in e d with th e o u tp u t o p e n . in p u t sig n a ls a re ch a n g e d o n ly o n e time d u rin g tck (min ) 2 . i c c 4 d e p e n d s o n o u tp u t lo a d in g a n d cycle ra te s. sp e cifie d va lu e s a re o b ta in e d with th e o u tp u t o p e n . in p u t sig n a ls a re ch a n g e d o n ly o n e time d u rin g tck (min ) 3 . in p u t sig n a ls a re ch a n g e d o n ly o n e time d u rin g tck (min ) 4 . sta n d a rd p o we r ve rsio n . 3
em4 8 8 m1 6 4 4 vt d ____________________________________________ 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 ( c o n t i n u e d ) pa ra me te r sy mbol t e s t c ondition min. ma x . unit input le a ka ge c urre nt i i l 0 v i v d d q , v d d q = v d d all o th e r p in s n o t u n d e r te st= 0 v -0 .5 + 0 .5 u a ou tp u t le a ka g e cu rre n t i o l 0 v o v d d q , d o u t is d isa b le d -0 .5 + 0 .5 u a hig h le ve l o u tp u t vo lta g e v o h io = -2 ma 2 .4 v l o w le ve l o u tp u t vo lta g e v o l io = + 2 ma 0 .4 v a c o p e r a t i n g t e s t 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 ) ou tp u t re fe re n ce l e ve l 1 .4 v / 1 .4 v ou tp u t l o a d se e d ia g ra m a s b e lo w in p u t sig n a l l e ve l 2 .4 v / 0 .4 v t ra n sitio n t ime o f in p u t sig n a ls 2 n s in p u t re fe re n ce l e ve l 1 .4 v 4
em4 8 8 m1 6 4 4 vt d ____________________________________________ o p e r a t i n g a c c h a r a c t e r i s t i c s ( v d d = 3 . 3 v + / - 0 . 3 v , t a = 0 ~ 7 0 c ) pa ra me te r sy mbol -7 -7 .5 min. ma x . m i n . m a x . units note s clo ck cycle time cl = 3 cl = 2 t c k 7 7 .5 n s 7 .5 1 0 n s acce ss time fro m cl k cl = 3 cl = 2 t a c 5 .4 5 .4 n s 5 .4 6 n s cl k h ig h le ve l wid th t c h 2 .5 2 .5 n s cl k lo w le ve l wid th t c l 2 .5 2 .5 n s da ta -o u t h o ld time cl = 3 cl = 2 t o h 3 3 n s ns da ta -o u t h ig h imp e d a n ce time cl = 3 cl = 2 t h z 3 7 3 7 n s ns da ta -o u t lo w imp e d a n ce time t l z 0 0 n s in p u t h o ld time t i h 1 1 n s in p u t se tu p time t i s 1 .5 1 .5 n s active to active co mma n d p e rio d t r c 6 2 6 7 n s 2 active to precharge co mma n d p e rio d t r a s 4 2 1 0 0 k 4 5 1 0 0 k n s 2 precharge to active co mma n d p e rio d t r p 3 3 cl k 2 active to read/w rite d e la y time t r c d 3 3 cl k 2 a c t i v e ( o n e ) t o a c t i v e ( a n o t h e r ) c o m m a n d t r r d 2 2 cl k 2 read/w rite co mma n d to read/w rite co mma n d t c c d 1 1 cl k da ta -in to precharge co mma n d t d p l 2 2 cl k da ta -in to burst sto p co mma n d t b d l 1 1 clk da ta -o u t to h ig h imp e d a n ce fro m precharge co mma n d cl = 3 cl = 2 t r o h 3 3 cl k 2 2 cl k re fre sh time (4 ,0 9 6 cycle ) t e f 6 4 6 4 ms all vo lta g e s re fe re n ce d to vss. note : 1 . t hz d e fin e s th e time a t wh ich th e o u tp u t a ch ie ve th e o p e n circu it co n d itio n a n d is n o t re fe re n ce d to o u tp u t vo lta g e le ve ls. 2 . th e se p a ra me te rs a cco u n t fo r th e n u mb e r o f clo ck cycle s a n d d e p e n d o n th e o p e ra tin g fre q u e n cy o f th e clo ck, a s fo llo ws : th e n u mb e r o f clo ck cycle s = sp e cifie d va lu e o f timin g /clo ck p e rio d (co u n t fra ctio n s a s a wh o le n u mb e r) 5
em4 8 8 m1 6 4 4 vt d ____________________________________________ b l o c k d i a g r a m 6 d o i
em4 8 8 m1 6 4 4 vt d ____________________________________________ p i n a s s i g n m e n t : t s o p 5 4 p 5 4 p in tsop-ii (4 0 0 mil x 8 7 5 mil) 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 v dd dq0 v ddq dq1 dq2 v ssq dq3 dq4 v ddq dq5 dq6 v ssq dq7 v dd ldqm /we /cas /ras /cs ba0 ba1 a10/ap a0 a1 a2 a3 v dd v ss dq15 v ssq dq14 dq13 v ddq dq12 dq11 v ssq dq10 dq9 v ddq dq8 vss nc udqm clk cke nc a11 a9 a8 a7 a6 a5 a4 v ss x1 6
em4 8 8 m1 6 4 4 vt d ____________________________________________ p i n d e s c r i p t i o n s ( s i m p l i f i e d ) pin na me pin fu n ctio n cl k syste m clo ck ma ste r clo ck in p u t(active o n th e po sitive risin g e d g e ) /cs ch ip se le ct se le cts ch ip wh e n a ctive cke clo ck en a b le activa te s th e cl k wh e n h a n d d e a ctiva te s wh e n l . cke sh o u ld b e e n a b le d a t le a st o n e cycle p rio r to n e w co mma n d . disa b le in p u t b u f fe rs fo r p o we r d o wn in sta n d b y . a0 ~ a1 1 ad d re ss ro w a d d re ss (a0 to a1 1 ) is d e te rmin e d b y a0 to a1 1 le ve l a t th e b a n k a ctive co mma n d cycle cl k risin g e d g e . ca (ca0 to ca8 ) is d e te rmin e d b y a0 to a8 le ve l a t th e re a d o r write co mma n d cycle cl k risin g e d g e . an d th is co lu mn a d d re ss b e co me s b u rst a cce ss sta rt a d d re ss. a1 0 d e fin e s th e p re -ch a rg e mo d e . w h e n a1 0 = hig h a t th e p re - ch a rg e co mma n d cycle , a ll b a n ks a re p re -ch a rg e d . bu t wh e n a1 0 = l o w a t th e p re -ch a rg e co mma n d cycle , o n ly th e b a n k th a t is se le cte d b y ba0 /ba1 is p re -ch a rg e d . ba0 , ba1 ba n k ad d re ss se le cts wh ich b a n k is to b e a ctive . /ras ro w a d d re ss stro b e l a tch e s ro w ad d re sse s o n th e p o sitive risin g e d g e o f th e cl k with /ras l . en a b le s ro w a cce ss & p re -ch a rg e . /cas co lu mn a d d re ss stro b e l a tch e s co lu mn ad d re sse s o n th e p o sitive risin g e d g e o f th e cl k with /cas lo w . en a b le s co lu mn a cce ss. /w e w rite en a b le l a tch e s co lu mn ad d re sse s o n th e p o sitive risin g e d g e o f th e cl k with /cas lo w . en a b le s co lu mn a cce ss. udqm / l dqm da ta in p u t/o u tp u t ma sk dqm co n tro ls i/o b u f fe rs. dq0 ~ 1 5 da ta in p u t/o u tp u t dq p in s h a ve th e sa me fu n ctio n a s i/o p in s o n a co n ve n tio n a l dram. v d d / v s s po we r su p p ly / gro u n d v d d a n d v s s a re p o we r su p p ly p in s fo r in te rn a l circu its. v d d q / v s s q po we r su p p ly / gro u n d v d d q a n d v s s q a re p o we r su p p ly p in s fo r th e o u tp u t b u f fe rs. nc no co n n e ctio n th is p in is re co mme n d e d to b e le ft no co n n e ctio n o n th e d e vice . 8
em4 8 8 m1 6 4 4 vt d ____________________________________________ s i m p l i f i e d s t a t e d i a g r a m 9
em4 8 8 m1 6 4 4 vt d ____________________________________________ a d d r e s s i n p u t f o r m o d e r e g i s t e r s e t 10 bu rst l e n g th se q u e n tia l in te rle a ve a2 a1 a0 1 1 0 0 0 2 2 0 0 1 4 4 0 1 0 8 8 0 1 1 re se rve d re se rve d 1 0 0 re se rve d re se rve d 1 0 1 re se rve d re se rve d 1 1 0 fu ll pa g e re se rve d 1 1 1 cas l a te n cy a6 a5 a4 re se rve d 0 0 0 re se rve d 0 0 1 2 0 1 0 3 0 1 1 re se rve d 1 0 0 re se rve d 1 0 1 re se rve d 1 1 0 re se rve d 1 1 1 bu rst t yp e a3 in te rle a ve 1 se q u e n tia l 0 ba1 ba0 a 1 1 a1 0 a9 a8 a7 op e ra tio n mo d e 0 0 0 0 0 0 0 no rma l 0 0 0 0 1 0 0 bu rst re a d with sin g le -b it w rite ba1 ba0 a 1 1 a1 0 a9 a8 a7 a6 a5 a4 a3 a2 a1 a0 ope ra tion mode ca s la te nc y bt burs t le ngth
em4 8 8 m1 6 4 4 vt d ____________________________________________ b u r s t t y p e ( a 3 ) bu rst l e n g th a2 a1 a0 se q u e n tia l ad d re ssin g in te rle a ve ad d re ssin g 2 x x 0 0 1 0 1 x x 0 1 0 1 0 4 x 0 0 0 1 2 3 0 1 2 3 x 0 1 1 2 3 0 1 0 3 2 x 1 0 2 3 0 1 2 3 0 1 x 1 1 3 0 1 2 3 2 1 0 8 0 0 0 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 0 1 1 2 3 4 5 6 7 0 1 0 3 2 5 4 7 6 0 1 0 2 3 4 5 6 7 0 1 2 3 0 1 6 7 4 5 0 1 1 3 4 5 6 7 0 1 2 3 2 1 0 7 6 5 4 1 0 0 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 1 0 1 5 6 7 0 1 2 3 4 5 4 7 6 1 0 3 2 1 1 0 6 7 0 1 2 3 4 5 6 7 4 5 2 3 0 1 1 1 1 7 0 1 2 3 4 5 6 7 6 5 4 3 2 1 0 fu ll pa g e * n n n cn cn + 1 cn + 2 ... - * pa g e le n g th is a fu n ctio n o f i/o o rg a n iza tio n a n d co lu mn a d d re ssin g x1 6 (ca0 ~ ca8 ) : fu ll p a g e = 5 1 2 b its 1 1
em4 8 8 m1 6 4 4 vt d ____________________________________________ t r u t h t a b l e 1 . c o m m a n d t r u t h t a b l e comma nd sy mbol cke n-1 n /cs /ras /cas /w e ba0 , ba1 a1 0 a1 1 , a9 ~ a0 ig n o re co mma n d desl h x h x x x x x x no o p e ra tio n nop h x l h h h x x x bu rst sto p bsth h x l h h l x x x re a d read h x l h l h v l v re a d with a u to p re -ch a rg e reada h x l h l h v h v w rite w rit h x l h l l v l v w rite with a u to p re -ch a rg e w rit a h x l l h h v h v ba n k a ctiva te act h x l l h h v v v pre -ch a rg e se le ct b a n k pre h x l l h l v l x pre -ch a rg e a ll b a n ks p al l h x l l h l x h x mo d e re g iste r se t mrs h x l l l l l l v 2 . d q m t r u t h t a b l e comma nd sy mbol cke n-1 n /cs da ta write / o u tp u t e n a b le enb h x h da ta ma sk / o u tp u t d isa b le mask h x l h up p e r b yte write e n a b le / o u tp u t e n a b le bsth h x l re a d read h x l re a d with a u to p re -ch a rg e reada h x l w rite w rit h x l w rite with a u to p re -ch a rg e w rit a h x l ba n k a ctiva te act h x l pre -ch a rg e se le ct b a n k pre h x l pre -ch a rg e a ll b a n ks p al l h x l mo d e re g iste r se t mrs h x l 3 . c k e t r u t h t a b l e comma nd comma nd sy mbol cke n-1 n /cs /ras /cas /w e addr . activa tin g clo ck su sp e n d mo d e e n try h l x x x x x an y clo ck su sp e n d mo d e l l x x x x x clo ck su sp e n d clo ck su sp e n d mo d e e xit l h x x x x x id le cbr re fre sh co mma n d ref h h l l l h x id le se lf re fre sh e n try sel f h l l l l h x se lf re fre sh se lf re fre sh e xit l h l h h h x l h h x x x x id le po we r d o wn e n try h l x x x x x po we r d o wn po we r d o wn e xit l h x x x x x note : h = hig h le ve l, l = l o w le ve l, x = hig h o r l o w le ve l (do n ' t ca re ), v = v a lid d a ta in p u t 12
em4 8 8 m1 6 4 4 vt d ____________________________________________ 4 . o p e r a t i v e c o m m a n d t a b l e curre nt s ta te /cs /r /c /w addr . comma nd ac tion note s idle h x x x x desl no p o r p o we r d o wn 2 l h h x x nop o r bst no p o r p o we r d o wn 2 l h l h ba/ca/a1 0 read/reada il l egal 3 l h l l ba/ca/a1 0 w rit/w rit a il l egal 3 l l h h ba/ra act ro w a ctiva tin g l l h l ba, a1 0 pre/p al l no p l l l h x ref/sel f re fre sh o r se lf re fre sh 4 l l l l op -co d e mrs mo d e re g iste r a cce ssin g row a c tiv e h x x x x desl no p l h h x x nop o r bst no p l h l h ba/ca/a1 0 read/reada be g in re a d : de te rmin e ap 5 l h l l ba/ca/a1 0 w rit/w rit a be g in write : de te rmin e ap 5 l l h h ba/ra act il l egal 3 l l h l ba, a1 0 pre/p al l pre -ch a rg e 6 l l l h x ref/sel f il l egal 4 l l l l op -co d e mrs il l egal re a d h x x x x desl co n tin u e b u rst to e n d ? ro w a ctive l h h h x nop co n tin u e b u rst to e n d ? ro w a ctive l h h l x bst bu rst sto p ? ro w a ctive l h l h ba/ca/a1 0 read/reada t e r m i n a t e b u r s t , n e w r e a d : d e t e r m i n e a p 7 l l l l ba/ca/a1 0 w rit/w rit a t e r m i n a t e b u r s t , s t a r t w r i t e : d e t e r m i n e a p 7 .8 l l h h ba/ra act il l egal 3 l l h l ba/a1 0 pre/p al l t e rmin a te b u rst, p re -ch a rg in g 4 l l l h x ref/sel f il l egal l l l l op -co d e mrs il l egal w r i te h x x x x desl co n tin u e b u rst to e n d ? w rite re co ve rin g l h h h x nop co n tin u e b u rst to e n d ? w rite re co ve rin g l h h l x bst bu rst sto p ? ro w a ctive l h l h ba/ca/a1 0 read/reada t e r m i n a t e b u r s t , s t a r t r e a d : d e t e r m i n e a p 7 , 8 7 .8 l l l l ba/ca/a1 0 w rit/w rit a t e r m i n a t e b u r s t , n e w w r i t e : d e t e r m i n e a p 7 7 l l h h ba/ra act il l egal 3 l l h l ba/a1 0 pre/p al l t e rmin a te b u rst, p re -ch a rg in g 9 l l l h x ref/sel f il l egal l l l l op -co d e mrs il l egal re ma rk h = hig h le ve l, l = l o w le ve l, x = hig h o r l o w le ve l (do n ' t ca re ) 13
em4 8 8 m1 6 4 4 vt d ____________________________________________ re ma rk h = hig h le ve l, l = l o w le ve l, x = hig h o r l o w le ve l (do n ' t ca re ), ap = au to pre -ch a rg e 14 curre nt s ta te /cs /r /c /w addr . comma nd ac tion note s re a d with ap h x x x x desl co n tin u e b u rst to e n d ? pre -ch a rg in g l h h h x nop co n tin u e b u rst to e n d ? pre -ch a rg in g l h h l x bst il l egal l h l h ba/ca/a1 0 read/reada il l egal 3 l h l l ba/ca/a1 0 w rit/w rit a il l egal 3 l l h h ba/ra act il l egal 3 l l h l ba, a1 0 pre/p al l il l egal 3 l l l h x ref/sel f il l egal l l l l op -co d e mrs il l egal w rite with ap h x x x x desl b u rst to e n d ? w rite re co ve rin g with a u to p re -ch a rg e l h h h x nop co n tin u e b u rst to e n d ? w rite re co ve rin g with a u to p re -ch a rg e l h h l x bst il l egal l h l h ba/ca/a1 0 read/reada il l egal 3 l h l l ba/ca/a1 0 w rit/w rit a il l egal 3 l l h h ba/ra act il l egal 3 l l h l ba, a1 0 pre/p al l il l egal 3 l l l h x ref/sel f il l egal l l l l op -co d e mrs il l egal pre -c ha rging h x x x x desl no p ? en te r id le a fte r t r p l h h h x nop no p ? en te r id le a fte r t r p l h h l x bst il l egal l h l h ba/ca/a1 0 read/reada il l egal 3 l h l l ba/ca/a1 0 w rit/w rit a il l egal 3 l l h h ba/ra act il l egal 3 l l h l ba, a1 0 pre/p al l no p ? en te r id le a fte r t r p l l l h x ref/sel f il l egal l l l l op -co d e mrs il l egal row a c tiv a ting h x x x x desl no p ? en te r id le a fte r t r c d l h h h x nop no p ? en te r id le a fte r t r c d l h h l x bst il l egal l h l h ba/ca/a1 0 read/reada il l egal 3 l h l l ba/ca/a1 0 w rit/w rit a il l egal 3 l l h h ba/ra act il l egal 3 .1 l l h l ba, a1 0 pre/p al l il l egal 3 l l l h x ref/sel f il l egal l l l l op -co d e mrs il l egal
em4 8 8 m1 6 4 4 vt d ____________________________________________ curre nt s ta te /cs /r /c /w addr . comma nd ac tion note s w rite re c ov e ring h x x x x desl no p en te r ro w a ctive a fte r t d p l l h h h x nop no p en te r ro w a ctive a fte r t d p l l h h l x bst no p en te r ro w a ctive a fte r t d p l l h l h ba/ca/a1 0 read/reada sta rt re a d , de te rmin e ap l h l l ba/ca/a1 0 w rit/w rit a ne w write , de te rmin e ap 8 l l h h ba/ra act il l egal 3 l l h l ba, a1 0 pre/p al l il l egal 3 l l l h x ref/sel f il l egal l l l l op -co d e mrs il l egal w rite re c ov e ring with ap h x x x x desl no p en te r p re -ch a rg e a fte r t d p l l h h h x nop no p en te r p re -ch a rg e a fte r t d p l l h h l x bst no p en te r p re -ch a rg e a fte r t d p l l h l h ba/ca/a1 0 read/reada il l egal 3 .8 l h l l ba/ca/a1 0 w rit/w rit a il l egal 3 l l h h ba/ra act il l egal 3 l l h l ba, a1 0 pre/p al l il l egal l l l h x ref/sel f il l egal l l l l op -co d e mrs il l egal re fre s hing h x x x x desl no p en te r id le a fte r t r c l h h x x nop/ bst no p en te r id le a fte r t r c l h l x x read/w rit il l egal l l h x x act/pre/p al l il l egal l l l x x ref/sel f/mrs il l egal mode re gis te r ac c e s s ing h x x x x desl no p l h h h x nop no p l h h l x bst il l egal l h l x x read/w rit il l egal l l x x x act/pre/p al l / ref/sel f/mrs il l egal re ma rk h = hig h le ve l, l = l o w le ve l, x = hig h o r l o w le ve l (do n ' t ca re ), ap = au to pre -ch a rg e note s 1 . all e n trie s a ssu me th a t cke wa s a ctive (hig h le ve l) d u rin g th e p re ce d in g clo ck cycle . 2 . if a ll b a n ks a re id le , a n d cke is in a ctive (l o w le ve l), sdram will e n te r po we r d o wn mo d e . all in p u t b u f fe rs e xce p t cke will b e d isa b le d . 3 . ille g a l to b a n k in sp e cifie d sta te s; f u n c t i o n m a y b e l e g a l i n t h e b a n k i n d i c a t e d b y b a n k a d d r e s s ( b a ) , d e p e n d i n g o n t h e s t a t e o f t h a t b a n k . 4 . if a ll b a n ks a re id le , a n d cke is in a ctive (l o w le ve l), sdram will e n te r se lf re fre sh mo d e . all in p u t b u f fe rs e xce p t cke will b e d isa b le d . 5 . ille g a l if t r c d is n o t sa tisfie d . 6 . ille g a l if t r a s is n o t sa tisfie d . 7 . mu st sa tisfy b u rst in te rru p t co n d itio n . 8 . mu st sa tisfy b u s co n te n tio n , b u s tu rn a ro u n d , a n d /o r write re co ve ry re q u ire me n ts. 9 . mu st ma sk p re ce d in g d a ta wh ich d o n ' t sa tisfy t d p l . 1 0 . ille g a l if t r r d is n o t sa tisfie d . 15
em4 8 8 m1 6 4 4 vt d ____________________________________________ 5 . c o m m a n d t r u t h t a b l e f o r c k e curre nt s ta te cke n -1 n /cs /r /c /w addr . ac tion note s se lf re fre s h h x x x x x x inv al id, cl k (n C 1 ) wo u ld e xit se lf re fre sh l h h x x x x se lf re fre sh re co ve ry l h l h h x x se lf re fre sh re co ve ry l h l h l x x il l egal l h l l x x x il l egal l l x x x x x ma in ta in se lf re fre sh se lf re fre s h re c ov e ry h h h x x x x id le a fte r t r c h h l h h x x id le a fte r t r c h h l h l x x il l egal h h l l x x x il l egal h l h x x x x il l egal h l l h h x x il l egal h l l h l x x il l egal h l l l x x x il l egal powe r down h x x x x x x inv al id, cl k(n -1 ) wo u ld e xit p o we r d o wn l h x x x x x exit p o we r d o wn id le l l x x x x x ma in ta in p o we r d o wn mo d e both ba nk s idle h h h x x x re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le h h l h x x re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le h h l l h x re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le h h l l l h x re fre sh h h l l l l op -co d e re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le h l h x x x re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le h l l h x x re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le h l l l h x re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le h l l l l h x se lf re fre sh 1 h l l l l l op -co d e re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le l x x x x x x po we r d o wn 1 row a c tiv e h x x x x x x re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le l x x x x x x po we r d o wn 1 any s ta te othe r tha n lis te d a bov e h h x x x x re fe r to o p e ra tio n s in op e ra tive co mma n d t a b le h l x x x x x be g in clo ck su sp e n d n e xt cycle 2 l h x x x x x exit clo ck su sp e n d n e xt cycle l l x x x x x ma in ta in clo ck su sp e n d r e m a r k : h = h i g h l e ve l , l = l o w l e ve l , x = h i g h o r l o w l e ve l ( d o n ' t ca r e ) note s : 1 . se lf re fre sh ca n b e e n te re d o n ly fro m th e b o th b a n ks id le sta te . po we r d o wn ca n b e e n te re d o n ly fro m b o th b a n ks id le o r ro w a ctive sta te . 2. m us t be l e ga l c om m a nd a s de fi ne d i n o pe ra t i ve com m a nd t a bl 16
em4 8 8 m1 6 4 4 vt d ____________________________________________ r e c o m m e n d e d p o w e r o n a n d i n i t i a l i za t i o n : t he fol l ow i ng pow e r on a nd i ni t i a l i z a t i on s e que nc e gua ra nt e e s t he de vi c e i s pre c ondi t i one d t o e a c h us e rs s pe c i fi c ne e ds .(l i ke a c onve nt i ona l d ra m ) d uri ng pow e r on, a l l v d d a nd v d d q pi ns m us t be bui l t up s i m ul t a ne ous l y t o t he s pe c i fi e d vol t a ge w he n t he i nput s i gna l s a re he l d i n t he n o p s t a t e . t he pow e r on vol t a ge m us t not e xc e e d v d d + 0.3v on a ny of t he i nput pi ns or v d d s uppl i e s . (cl k s i gna l s t a rt e d a t s a m e t i m e ) a ft e r pow e r on, a n i ni t i a l pa us e of 200 s i s re qui re d fol l ow e d by a pre c ha r ge of a l l ba nks us i ng t he pre c ha r ge c om m a nd. t o pre ve nt da t a c ont e nt i on on t he d q bus duri ng pow e r on, i t i s re qui re d t ha t t he d q m a nd ck e pi ns be he l d hi gh duri ng t he i ni t i a l pa us e pe ri od. o nc e a l l ba nks ha ve be e n pre c ha r ge d, t he m ode re gi s t e r s e t com m a nd m us t be i s s ue d t o i ni t i a l i z e t he m ode re gi s t e r . a m i ni m um of e i ght a ut o re fre s h c yc l e s (cbr) a re a l s o re qui re d, a nd t he s e m a y be done be fore or a ft e r progra m m i ng t he m ode re gi s t e r . 17
em4 8 8 m1 6 4 4 vt d ____________________________________________ p a c k a g e d r a w i n g : t s o p i i 54p 18

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