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super sequencer? with voltage readback adc ADM1064 rev. 0 in fo rmation furn ished by an alog d e v i c e s is believed to be accurate and reliable. how e ver, n o resp on sibili ty is assume d b y a n alog de vices fo r its use, nor for an y i n fri n geme nt s of p a t e nt s or ot h e r ri ght s o f th ird parties th at may result fro m its use . s p ecificatio n s subj ec t to ch an g e witho u t n o tice. no licen s e is g r an te d by implicati o n or ot herwi s e u n der a n y p a t e nt or p a t e nt ri ghts of analog de v i ces. trademarks an d registered tra d ema r ks are the prop erty o f their respective ow ners. one technolog y way, p.o . box 9106, norwood, ma 02062-9106, u.s.a. t e l: 781. 329. 4 700 www.analog.com fax: 781. 326. 87 03 ? 2004 analog de vices, i n c. al l r i ght s r e ser v ed . features complete supe rvisory and seq u encing soluti on for up to 10 supplies 10 supply fault detectors enable super v ision of supplies to better than 1% accuracy 5 selectable in put attenuators allow super v i sion: supplies up to 14.4 v on vh supplies up to 6 v on v p 1C4 5 du al-f unction inputs, vx1C 5: high impedance input to supp ly fa ult detector with thresholds bet w een 0.573 v a n d 1.37 5 v general-purpo s e logic input 10 programmable output dri v ers (pdo1C10 ): open collector with external p u ll- up push/pull o u tp ut, dri v en to v ddca p o r vpn o p en co llecto r with weak pul l - u p to vd dcap o r vpn internally char ge-pumped hi gh drive for us e with external n-fet (pdo1C6 only) sequencing en gine (se) imple m ents state m a chine control of pd o ou tpu t s: state changes conditional on input events enables complex control of boards power-up and power-do wn sequ ence control fault e v ent ha ndling interrupt generation on warnings watchdog function can be integrated in se program software control of sequencing thr o ugh smbus 12-bit a d c for readback of al l supervise d vol t ages 2 auxili ary ( sin gle-ende d) a d c inputs reference input, refin, has 2 i n put options: driven directly from 2.048v ( 0.25%) refou t pin more accurate external refer e nce for improved adc performance device po were d by the highest o f vp1C4, vh fo r impro v ed redundancy user eeprom: 256 byte s industry-st a ndard 2-wir e bus i n terface (smbus) guarantee d p d o lo w with vh, vpn = 1.2 v 40-lea d 6 mm 6 mm lfcsp and 48-lea d 7 mm 7 mm tqfp packages func tio n a l block di agram 04633- 001 pdo7 pdo8 pdo9 pdo10 pdognd vddcap vdd arbitrator gnd vx1 vx2 vx3 vx4 vx5 vp1 vp2 vp3 vp4 vh agnd programmable reset generators (sfds) dual- function inputs (logic inputs or sfds) sequencing engine configurable output drivers (hv capable of driving gates of n-channel fet) configurable output drivers (lv capable of driving logic signals) pdo1 pdo2 pdo3 pdo4 pdo5 pdo6 sda scl a1 a0 smbus interface refout refin aux2 aux1 refgnd vref 12-bit sar adc mu x eeprom ADM1064 fi g u r e 1 . applic ati o ns central office s y stems servers/router s multivoltage s y stem lin e cards dsp/fpga s u p p ly seq u encing in-circuit testin g of margined supplies general description the ad m1064 is a co nf igura b l e s u p e r v is o r y/s e q u en c i n g de vice t h a t o f fers a sing le-chi p s o l u t i on fo r su p p ly m o ni to r i n g and s e qu e n c i ng i n m u l t i p l e su p p ly s y ste m s . i n add i t i on to t h e s e f u n c tio n s, t h e ad m1064 in teg r a t es a 12-b i t ad c which can be u s e d to a c c u r a t e ly re a d b a ck up to 1 2 s e p a r a te v o lt age s . ( c ont i nu e d on pag e 3 )
ADM1064 rev. 0 | page 2 of 32 table of contents general description ......................................................................... 3 specifications ..................................................................................... 4 pin configurations and function descriptions ........................... 7 absolute maximum ratings ............................................................ 8 thermal characteristics .............................................................. 8 esd caution .................................................................................. 8 typical performance characteristics ............................................. 9 powering the ADM1064 ................................................................ 12 inputs ................................................................................................ 13 supply supervision ..................................................................... 13 programming the supply fault detectors ............................... 13 input comparator hysteresis .................................................... 14 input glitch filtering ................................................................. 14 supply supervision with vxn inputs ....................................... 14 vxn pins as digital inputs ........................................................ 15 outputs ............................................................................................ 16 supply sequencing through configurable output drivers .. 16 sequencing engine ......................................................................... 17 overview ...................................................................................... 17 war n i ng s ...................................................................................... 17 smbus jump/unconditional jump .......................................... 17 sequencing engine application example ............................... 18 sequence detector ...................................................................... 19 monitoring fault detector ........................................................ 19 timeout detector ....................................................................... 19 fault reporting ........................................................................... 19 volt age re adb ack ............................................................................ 20 supply supervision with the adc ........................................... 20 applications diagram .................................................................... 21 communicating with the ADM1064 ........................................... 22 configuration download at power-up ................................... 22 updating the configuration ..................................................... 22 updating the sequencing engine ............................................. 23 internal registers ........................................................................ 23 eeprom ..................................................................................... 23 serial bus interface ..................................................................... 23 write operations ........................................................................ 25 read operations ......................................................................... 27 outline dimensions ....................................................................... 29 ordering guide .......................................................................... 29 revision history 10/04revision 0: initial version
ADM1064 rev. 0 | page 3 of 3 2 gene ral description ( c ont i nu e d f r om p a g e 1 ) the de v i ce als o p r o v ides u p t o ten p r og ra mma ble in p u ts fo r mon i tor i ng u n d e r , ove r , or out - of - w i n d o w f a u l t s on up to te n s u p p l i e s . i n a d d i t i o n , t e n p r o g r a m m a b l e o u t p u t s c a n b e u s e d a s log i c ena b les. six o f t h em can al s o p r o v ide u p to a 12 v o u t p ut fo r dr i v in g t h e ga te o f a n n-ch a nnel f e t , w h ich can b e plac e d i n th e pa th o f a s u p p l y . the log i cal co r e o f t h e de vi ce is a s e q u e n ci n g eng i n e . this s t a t e- machi n e - b a s e d co n s t r uc t i o n p r o v ides u p t o 63 dif f er en t s t a t es. this desig n enab les v e r y f l e x i b le s e q u en cing o f th e o u t p u t s, b a s e d o n t h e con d i t ion o f t h e i n p u ts. t h e devi ce i s co n t r o ll ed via co nf i g ura t i o n d a ta t h a t ca n be p r og ra mm e d in t o a n eepro m. the w h ole co nf igura t io n can be p r og ra mm e d usin g a n in t u i t iv e gui-bas e d s o f t wa r e p a cka g e p r o v ided b y adi. 04633-002 gpi signal conditioning sfd gpi signal conditioning sfd sfd sfd selectable attenuator selectable attenuator device controller osc eeprom sda scl a1 a0 smbus interface refout refin aux1 aux2 refgnd vref 12-bit sar adc ADM1064 configurable o/p driver (hv) pdo1 pdo2 pdognd pdo3 vccp gnd pdo4 pdo5 pdo8 pdo9 configurable o/p driver (hv) pdo6 configurable o/p driver (lv) pdo7 configurable o/p driver (lv) pdo10 sequencing engine vx2 vx3 vx4 vp2 vp3 vp4 vh vp1 vx1 agnd vx5 vddcap vdd arbitrator reg 5.25v charge pump f i gu r e 2 . de tai l e d bl oc k dia g r a m
ADM1064 rev. 0 | page 4 of 32 specifications vh = 3.0 v to 14.4 v 1 , vpn = 3.0 v to 6.0 v 1 , t a = ?40c to +85c, unless otherwise noted. table 1. parameter min typ max unit test conditions/comments power supply arbitration vh, vpn 3.0 v minimum supply required on one of vpn, vh vp 6.0 v maximum vddcap = 5.1 v, typical vh 14.4 v vddcap = 4.75 v vddcap 2.7 4.75 5.4 v regulated ldo output c vddcap 10 f minimum recommended decoupling capacitance power supply supply current, i vh , i vpn 4.2 6 ma vddcap = 4.75 v, pdo1C10 off, dacs off, adc off additional currents all pdo fet drivers on 1 ma vddcap = 4.75 v, pdo1-6 loaded with 1 a each, pdo7C10 off current available from vddcap 2 ma maximum additional load that can be drawn from all pdo pull-ups to vddcap dacs supply current 2.2 ma 6 dacs on with 100 a maximum load on each adc supply current 1 ma running round-robin loop eeprom erase current 10 ma 1 ms duration only, vddcap = 3 v supply fault detectors vh pin input attenuator error 0.05 % midrange and high range detection ranges high range 6 14.4 v midrange 2.5 6 v vpn pins input attenuator error 0.05 % low range and midrange detection ranges midrange 2.5 6 v low range 1.25 3 v ultralow range 0.573 1.375 v no input attenuation error vx pins input impedance 1 m? detection ranges ultralow range 0.573 1.375 v no input attenuation error absolute accuracy 1 % vref error + dac nonlinearity + comparator offset error + input attenuation error threshold resolution 8 bits digital glitch filter 0 s mi nimum programmable filter length 100 s maximum programmable filter length analog-to-digital converter signal range 0 v refin v the adc can convert signals presented to the vh, vpn, and vx_gpin pins. vpn and vh input signals are attenuated depending on selected range. a signal at the pin corresponding to the selected range is from 0.573 v to 1.375 v at the adc input.
ADM1064 rev. 0 | page 5 of 32 parameter min typ max unit test conditions/comments input reference voltage on refin pin, v refin 2.048 v resolution 12 bits inl 2.5 lsb endpoint corrected, v refin = 2.048 v gain error 0.05 % v refin = 2.048 v conversion time 0.44 ms one conversion on one channel 84 ms all 12 channels selected, 16x averaging enabled offset error 2 lsb v refin = 2.048 v input noise 0.25 lsb rms direct input (no attenuator) reference output reference output voltage 2.043 2.048 2.053 v no load load regulation ?0.25 mv sourcing current, i dacnmax = ?100 a 0.25 mv sinking current, i dacnmax = 100 a minimum load capacitance 1 f capaci tor required for decoupling, stability load regulation 2 mv per 100 a psrr 60 db dc programmable driver outputs high voltage (charge pump) mode (pdo1C6) output impedance 500 k? v oh 11 12.5 14 v i oh = 0 10.5 12 13.5 v i oh = 1a i outavg 20 a 2 v < v oh < 7 v standard (digital output) mode (pdo1C10) v oh 2.4 v v pu (pull-up to vddcap or v pn ) = 2.7 v, i oh = 0.5 ma 4.5 v v pu to v pn = 6.0 v, i oh = 0 ma v pu ? 0.3 v v pu 2.7 v, i oh = 0.5 ma v ol 0 0.50 v i ol = 20 ma i ol 2 20 ma maximum sink current per pdo pin i sink 2 60 ma maximum total sink for all pdos r pull-up 20 k? internal pull-up i source (vpn) 2 2 ma current load on any vpn pull-ups, that is, total source current available through any number of pdo pull-up switches configured onto any one three-state output leakage current 10 a v pdo = 14.4 v oscillator frequency 90 100 110 khz all on-chi p time delays derived from this clock digital inputs (vxn, a0, a1) input high voltage, v ih 2.0 v maximum v in = 5.5 v input low voltage, v il 0.8 v maximum v in = 5.5 v input high current, i ih ?1 a v in = 5.5 v input low current, i il 1 a v in = 0 input capacitance 5 pf programmable pull-down current, i pull-down 20 a vddcap = 4.75, t a = 25c, if known logic state is required serial bus digital inputs (sda, scl) input high voltage, v ih 2.0 v input low voltage, v il 0.8 v output low voltage, v ol 2 0.4 v i out = ?3.0 ma
ADM1064 rev. 0 | page 6 of 32 parameter min typ max unit test conditions/comments serial bus timing clock frequency, f sclk 400 khz bus free time, t buf 4.7 s start setup time, t su;sta 4.7 s start hold time, t hd;sta 4 s scl low time, t low 4.7 s scl high time, t high 4 s scl, sda rise time, t r 1000 s scl, sda fall time, t f 300 s data setup time, t su;dat 250 ns data hold time, t hd;dat 5 ns input low current, i il 1 a v in = 0 sequencing engine timing state change time 10 s 1 at least one of the vh, vp1-4 pins must be 3.0 v to maintain the device supply on vddcap. 2 specification is not production tested, but is supported by characterization data at initial product release.
ADM1064 rev. 0 | page 7 of 3 2 pin conf igurations and f u ncti on descriptions 04633-003 nc = no connect ADM1064 top view (not to scale) gnd 40 v ddcap 39 aux 1 38 aux 2 37 sd a 36 sc l 35 a1 34 a0 33 v ccp 32 pdognd 31 agnd 11 re fgnd 12 re fin 13 re fout 14 nc 15 nc 16 nc 17 nc 18 nc 19 nc 20 v x1 1 v x2 2 v x3 3 v x4 4 v x5 5 v p1 6 v p2 7 v p3 8 v p4 9 vh 10 pdo1 30 pdo2 29 pdo3 28 pdo4 27 pdo5 26 pdo6 25 pdo7 24 pdo8 23 pdo9 22 pdo10 21 pin 1 indicator f i g u re 3. lfcs p pin conf ig ur at i o n 04633-004 nc = no connect nc 48 gnd 47 v d dcap 46 aux 1 45 aux 2 44 sd a 43 sc l 42 a1 41 a0 40 vc c p 39 pdognd 38 nc 37 nc 13 agnd 14 re fgnd 15 re fin 16 re fout 17 nc 18 nc 19 nc 20 nc 21 nc 22 nc 23 nc 24 nc 1 v x1 2 v x2 3 v x3 4 v x4 5 v x5 6 v p1 7 v p2 8 v p3 9 v p4 10 vh 11 nc 12 nc 36 pdo1 35 pdo2 34 pdo3 33 pdo4 32 pdo5 31 pdo6 30 pdo7 29 pdo8 28 pdo9 27 pdo10 26 nc 25 ADM1064 top view (not to scale) pin 1 indicator f i gure 4. t q f p pin c o nfigur ation ta ble 2. pi n f u nct i on d e s c ri pt i o ns pin no. l f c s p t q f p m n e m o n i c d e s c r i p t i o n 15-20 1, 12C13, 18C25, 36C37, 48 nc no connectio n. 1 C 5 2 C 6 v x 1 C 5 high impedance inputs to supply fa ult detectors. fault thresholds ca n be set from 0.573 v to 1 . 375 v. alternatively, these pin s can be used as general- purpose digital i n puts. 6 C 9 7 C 1 0 v p 1 C 4 low voltage inputs to supply fault detectors. t h ree input rang es can be set by altering the input attenuation on a potential divid e r connected to th ese pins, the output of which connects to a su pply fault detector. these pins allow thre sholds from 2.5 v to 6.0 v, 1. 25 v to 3.00 v, a n d 0.573 v to 1.375 v. 1 0 1 1 v h high voltage input to supply f a ult detectors. three input rang es ca n be set by altering the input attenuation on a potential divid e r connected to th is pin, the output of which connects to a supply fault detector. t h is pin allows thresholds from 6.0 v to 14.4 v and 2.5 v to 6.0 v. 11 14 agnd ground return f o r input attenu ators. 12 15 refgnd ground return for on-chi p reference circuits. 13 16 refin reference input for adc. nominally, 2.048 v. 14 17 refout 2.048 v referen c e output. 2 1 C 3 0 2 6 C 3 5 p d o 1 0 C 1 programmable output d r i v e r s . 31 38 pdognd ground return f o r output drivers. 3 2 3 9 v c c p central charge- p ump voltage of 5.25 v. a reservoir capa citor must be connected between this pi n and gnd. 33 40 a0 logic input. this pin sets the se venth bit of the smbus interface address. 34 41 a1 logic input. this pin sets the si x t h bit of the smbus interface address. 35 42 scl smbus clock pin . open-drain ou tput requires external resi stive pull-up. 36 43 sda smbus data i/o pin. open-drain o utput req u ires ex ternal resistive pull-up. 37 44 aux2 auxiliary, single -ended adc inp ut. 38 45 aux1 auxiliary, single -ended adc inp ut. 39 46 vddcap device supply voltage. linearly regulated from t h e highest of the vp1C4, vh pins to a typical of 4.75 v. 4 0 4 7 g n d supply g r o u n d .
ADM1064 rev. 0 | page 8 of 3 2 absolute maximum ratings table 3. p a r a m e t e r r a t i n g voltage on vh pin 16 v voltage on vp pins 7 v voltage on vx p i ns ?0.3 v to +6.5 v voltage on aux1, aux2, ref i n pins ?0.3 v to +5 v input current at any pin 5 ma package input current 20 ma maximum junction temperature (t j max) 150c storage temperature range ?65c to +150c lead temperature, soldering vapor phase, 60 s 215c s t r e s s es a b o v e t h os e lis t e d u n de r a b s o l u t e m a xi m u m r a t i n g s ma y c a us e p e r m a n en t dama ge t o t h e de vice . this is a s t r e s s ra t i n g onl y ; f u n c t i o n al o p era t ion o f t h e de vice a t t h es e o r an y o t h e r con d i t io ns a b o v e t h o s e i ndic a te d i n t h e op er a t io na l s e c t io n o f t h is sp e c if ic a t io n is no t im plie d . e x p o sur e t o a b s o l u te max i m u m ra t i ng co ndi t i on s fo r ex ten d e d p e r i o d s ma y a f fe c t de vice r e l i ab i l i t y . thermal c h aracteristics 40-lead lfcs p p a c k a g e: ja = 25c/w 48-lead t q fp p a c k a g e: ja = 14.8c/w esd caution esd (electrostatic discharge) sensitive device. ele c tros tatic charg e s as high as 4000 v readily accumulate on the human body and test eq uipment and can discharge wi thout detection. although this product features proprietary esd protection circu i try, permanent dama ge may occur on devices subjected to high energy electrostatic discharges. theref ore, prop er esd precautions a r e recommended to avoid perform a nce degradation or l o ss of functiona l ity.
ADM1064 rev. 0 | page 9 of 3 2 typical perf orm ance cha r acte ristics 6 0 1 2 3 4 5 06 5 4 3 2 1 04633-050 v vp1 (v) v vddcap (v ) fi g u r e 5 . v vddca p vs . v vp1 6 0 1 2 3 4 5 01 6 14 12 10 8 6 4 2 04633-051 v vh (v) v v ddcap (v ) fi g u r e 6 . v vddca p vs . v vh 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0123456 04633-052 v vp1 (v) i vp1 (ma) fi g u r e 7 . i vp1 vs . v vp1 ( v p1 as su p p ly ) 180 160 140 120 100 80 60 40 20 0 0123456 04633-053 v vp1 (v) i vp1 ( a) fi g u r e 8 . i vp1 vs . v vp1 ( v p1 not as sup p l y ) 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 01 6 14 12 10 8 6 4 2 04633-054 v vh (v) i vh (ma) fi g u r e 9 . i vh vs . v vh (v h a s s u p p l y ) 350 300 250 200 150 100 50 0 06 5 4 3 2 1 04633-055 v vh (v) i vh ( a) f i g u re 10. i vh vs . v vh (v h n o t a s s u p p l y )
ADM1064 rev. 0 | page 10 of 32 14 12 10 8 6 4 2 0 0 15.0 12.5 10.0 7.5 5.0 2.5 04633-056 i load current ( a) v pdo 1 charge p u mp e d f i g u re 11. v pdo1 (fe t d r i v e mod e ) vs . i lo a d 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 06 5 4 3 2 1 04633-057 i load (ma) v pd o1 (v ) vp1 = 5v vp1 = 3v f i g u re 12. v pdo1 (st r ong p u ll-up vp ) vs . i lo a d 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 06 0 50 40 30 20 10 04633-058 i load ( a) v pdo 1 (v ) vp1 = 5v vp1 = 3v f i g u re 13. v pdo1 ( w eak p u ll-u p t o v p ) v s . i lo a d 1.0 ?1.0 ?0.8 ?0.6 ?0.4 ?0.2 0 0.2 0.4 0.6 0.8 4000 1000 2000 3000 0 04633-066 code dnl (ls b ) f i gure 14. dnl f o r a d c 1.0 ? 1.0 ? 0.8 ? 0.6 ? 0.4 ? 0.2 0 0.2 0.4 0.6 0.8 0 4000 3000 2000 1000 04633-063 code inl (lsb) f i gure 15. inl fo r a d c 12000 10000 8000 6000 4000 2000 0 2049 2048 2047 04633-064 code hits p e r code 81 9894 25 f i g u re 16. a d c n o i s e , m i dcode input , 10, 0 00 r e ads
ADM1064 rev. 0 | page 11 of 32 2.058 2.038 2.043 2.048 2.053 ?40 ? 20 0 2 0 4 0 6 0 100 80 04633-061 temperature ( c) re fout (v ) vp1 = 3.0v vp1 = 4.75v f i g u re 17. r e fou t v s . t e mpe r at u r e
ADM1064 rev. 0 | page 12 of 32 powering the ADM1064 the ad m1064 is p o w e r e d f r o m the hig h est vol t a g e in p u t o n e i th e r th e posi ti v e - o nl y s u p p l y in p u t s (v p n ) o r th e hi gh v o l t a g e su p p ly in pu t (v h). this t e ch ni q u e o f fers im p r o v e d r e d u ndan c y as the de vic e is n o t dep e n d en t o n an y p a r t ic u l a r v o l t a g e ra il t o k e ep i t o p er a t ional . the s a m e pin s a r e us e d fo r s u p p l y fa u l t d e t e ctio n (d iscus s e d la t e r in t h e n e xt s e ct i o n ) . a vdd a r b i tra t o r o n the device ch o o s e s w h ic h su p p l y t o us e . the a r b i tra t o r ca n be con s ider ed an o r i n g o f f i v e ld o s t o g e t h er . a s u p p l y co m p a r a t o r ch o o s e s w h ich o f t h e in p u ts is hig h e s t an d s e le c t s t h is o n e t o p r o v ide t h e o n -chi p s u p p l y . th er e is minimal sw i t ch in g loss wi t h t h is a r ch i t e c t u r e (~0.2 v), r e su l t in g i n t h e a b ili t y t o p o w e r th e ad m1064 f r o m a s u p p l y as lo w as 3.0 v . n o t e tha t t h e s u p p l y o n th e vx n p i n s ca nn ot b e us ed t o p o w e r th e de v i ce . a n e x te r n a l c a p a c i tor to g n d i s re qu i r e d to de c o upl e t h e on- ch i p supply f r om noi s e. th i s c a p a c i tor s h ou l d b e c o n n e c te d to t h e vdd c ap pin, as sh o w n i n f i gur e 18. th e c a p a ci to r h a s anot he r u s e d u r i ng brow nout s ( m o m e n t a r y l o ss of p o we r ) . u n der t h es e con d i t io ns, w h en t h e i n p u t s u p p l y (vp n o r vh) d i ps tra n si en tl y be lo w v dd , t h e s y n c hr on o u s r e c t if ier sw i t ch i m m e d i at e l y t u r n s o f f s o t h at i t d o e s n o t p u l l v dd do wn. t h e v dd ca p ca n t h e n ac t as a r e s e r v o i r t o k e ep t h e de vice ac t i ve un t i l t h e n e xt hi g h est s u p p l y t a k e s o v er t h e p o w e r i n g o f t h e de vice . 10 f is r e co mmen d e d f o r this r e s e r v o i r/deco u p lin g fu n c ti o n . n o t e tha t w h en tw o o r m o r e su p p lies a r e wi thin 100 mv o f eac h o t h e r , th e s u p p ly th a t ta k e s co n t r o l o f v dd fi r s t k e e p s c o n t r o l . f o r exa m p l e , if vp1 is co nn ec t e d t o a 3.3 v su p p l y , th en v dd p o w e rs u p t o a p p r o x ima t e l y 3.1 v thr o ug h vp1. i f vp2 is th en co nnec t e d t o ano t h e r 3.3 v s u p p l y , vp1 s t il l p o w e rs th e de vice , unles s vp2 g o es 100 mv hig h er tha n vp1. supply comparator in en out 4.75v ldo in en out 4.75v ldo in en out 4.75v ldo in en out 4.75v ldo in en out 4.75v ldo vh vp4 vp3 vp2 vp1 vddcap internal device supply 0 4633 -022 f i g u re 18. v dd a r b i t r at or o p er at i o n
ADM1064 rev. 0 | page 13 of 32 inputs supply su pervision the ad m1064 has t e n p r og ra mma b l e in p u ts. f i v e o f th es e a r e de di ca te d su p p ly fa u l t dete c t o r s (s f d s). th es e de di ca te d in pu t s a r e cal l e d v h and vp1C4 b y de fa u l t. the o t h e r f i v e in p u ts a r e la b e led vx 1Cvx 5 a n d ha v e d u al fun c ti o n ali t y . t h ey ca n be us e d as e i ther su p p l y fa u l t de t e c t o r s, wi t h simi l a r f u n c tio n al i t y t o vh an d vp1 C 4, o r cmos/t tl - c o m p a t i b l e l o g i c in p u ts t o th e de vices. th er ef o r e , th e ad m1064 ca n ha ve u p t o t e n a n al og in p u ts, a mi ni m u m o f f i ve a n a l o g in p u ts and f i ve dig i t a l i n p u ts , o r a co m b ina t ion. i f a n in p u t is us ed as an a n al og in p u t, i t ca n n o t b e us e d as a d i g i t a l in put. t h er efo r e, a co nf igura t io n r e q u ir in g t e n a n a l og in p u ts h a s n o dig i t a l i n p u t s a v a i la b l e . t a b l e 5 show s t h e d e t a i l s of e a ch of t h e i n put s . 04633- 023 + ? + ? uv comparator vref fault type select ov comparator fault output glitch filter vpn mid low rang e select ultra low f i g u re 19. sup p l y f a ult d e tec t or bl ock programm ing t h e su pply fault detect ors the ad m1064 has u p t o t e n s u p p l y fa u l t detec t o r s (s fd s) o n i t s t e n i n p u t cha n ne ls. th es e hig h l y p r og ra mma b l e r e s e t g e n e ra t o rs e n abl e t h e sup e r v is ion of u p to te n sup p ly vol t age s . the su p p l i e s ca n be as lo w as 0.573 v a nd as hig h as 14 .4 v . the in p u ts can be co nf igur ed t o det e c t an u n der v ol ta g e f a u l t (the in p u t v o l t a g e d r o o p s b e l o w a pre p ro g r am me d v a lu e ) , an ove r volt age f a u l t ( t he in p u t v o l t a g e r i s e s a b o v e a p r ep rog r a m m e d val u e) o r a n o u t-o f - w i nd ow f a u l t ( u nd e r vo lt ag e or o v er v o l t a g e). th e t h r e sholds can be p r og ra mm e d t o a n 8-b i t r e s o l u tio n in r e g i s t ers p r o v i d ed i n th e ad m1064. t h i s tra n s l a t es t o a v o l t a g e r e sol u tio n t h a t i s d e p e nd e n t o n t h e r a ng e s e l e c t e d . the r e s o l u t i o n i s g i ven b y ste p si z e = th r e s h o l d ra nge /255 ther efo r e , if t h e hig h ra n g e is s e le c t e d on vh, t h e st ep size ca n be c a l c ul a t ed a s f o ll o w s : (14.4 v ? 4.8 v)/255 = 37.6 mv t a b l e 4 lis t s t h e u p p e r an d lo w e r limi t o f e a c h a v a i lab l e ra n g e , t h e b o t t om o f e a ch ra n g e ( v b ), a nd t h e ra n g e i t s e lf (v r ). table 4. voltage range limits voltage range (v) v b (v) v r (v) 0.573 to 1.375 0.573 0.802 1.25 to 3.00 1.25 1.75 2.5 to 6.0 2.5 3.5 4.8 to 14.4 4.8 9.6 the t h r e sh old v a l u e r e q u ir e d is g i v e n b y v t = ( v r n )/2 55 + v b w h er e: v t is t h e desir e d t h r e sh old vol t a g e (uv o r o v ) . v r i s t h e vol t age r a nge. n is t h e de ci mal val u e o f t h e 8- b i t co de . v b is th e bot t om o f th e ran g e . r e v e r s i n g th e eq u a ti o n , th e c o d e f o r a d e s i r e d th r e s h o l d i s gi v e n b y n = 255 ( v t ? v b )/ v r f o r exa m ple , if th e us er wan t s t o s e t a 5 v o v t h r e s h old on vp1, t h e co de t o b e pr og ra mm e d in t h e ps1 o v t h r e g i s t er (dis c u s s ed in t h e an-698 a p p l ica t ion n o t e ) is g i v e n b y n = 255 (5 ? 2.5)/3.5 ther efo r e , n = 182 (1011 0110 o r 0xb6). ta ble 5. i nput f u nct i ons , thr e s h olds , a n d r a nges input function voltage range (v) maximum hyst ere sis voltage resolution (mv) glitch filter (s) vh high v analog input 2.5C6.0 425 mv 13.7 0C100 4 . 8 C 1 4 . 4 1 . 1 6 v 3 7 . 6 0 C 1 0 0 vpn positive analog input 0.573C1.375 97.5 mv 3.14 0C100 1 . 2 5 C 3 . 0 0 2 1 2 m v 6 . 8 0 C 1 0 0 2.5C6.0 425 mv 13.7 0C100 vxn high z analog input 0.573C1.375 97.5 mv 3.14 0C100 digital i n p u t 0 C 5 n / a n / a 0 C 1 0 0
ADM1064 rev. 0 | page 14 of 32 inpu t com p arator h y steresis the uv an d o v co m p a r a t o r s sh own i n f i gur e 19 a r e a l wa y s l o o k i n g at v p n . t o av o i d c h at t e r i n g ( m u l t i p l e t r a n s i t i o n s w h e n t h e i n p u t is v e r y clos e t o t h e s e t t h r e s h old l e v e l ), t h es e com p a r a - t o rs ha v e dig i t a l l y p r og ra mma b l e h y s t er esis. th e h y s t er esis can b e p r og ra mm e d u p t o t h e va l u es s h own i n t a b l e 5. the h y s t er esis is adde d a f t e r a su p p l y v o l t a g e go es o u t o f t o lera n c e . ther efo r e , t h e us er can p r og ra m h o w m u ch ab o v e t h e u v t h re s h ol d t h e i n put m u st r i s e ag ai n b e fore a u v f a u l t i s de as s e r t e d . simi la rl y , t h e us er can p r og ra m h o w m u ch b e lo w t h e o v thr e sh old an in p u t m u s t fal l a g a i n bef o r e an o v fa u l t is de ass e r t e d . the h y s t er esis f i gur e is g i v e n b y v hy s t = v r n thres h /255 w h er e: v hy s t is t h e desi r e d h y st er esis v o l t a g e . n thres h is t h e de cimal val u e o f t h e 5- b i t h y s t er e s is co de . no t e t h a t n thresh has a max i m u m va l u e o f 31. t h e m a x i m u m h y s t er esis fo r t h e ra n g es is lis t e d in t a b l e 5. inpu t glitch filteri n g the f i nal s t a g e o f t h e s f d s is a g l i t ch f i l t er . thi s b l o c k p r o v ides t i m e - d o m ai n f i lte r i n g on t h e output of t h e sf d c o m p ar ator s . this al lo ws th e us er t o r e m o v e a n y s p ur io us tra n si tio n s s u c h as su p p ly b o u n c e a t t u r n -on. t h e g l i t ch f i lte r f u nc t i on is ad di t i on a l t o t h e dig i t a l l y p r og ra mma b l e h y s t er esis o f t h e s f d co m p a r a - t o rs. th e g l i t ch f i l t er tim e o u t is p r og ra mma b l e u p t o 100 s. f o r exa m ple , w h e n t h e g l i t ch f i l t er t i m e o u t is 1 00 s, a n y p u ls es a p p e a r in g o n t h e in p u t o f t h e g l i t ch f i l t er b l o c k t h a t a r e les s t h an 100 s in d u ra tio n a r e p r ev en te d f r o m a p p e a r in g o n t h e o u t p u t o f t h e g l i t ch f i l t er b l o c k. a n y in p u t p u ls e t h a t is lo n g er t h a n 100 s do es a p p e a r o n the o u t p u t o f th e g l i t c h f i l t er b l o c k. th e o u t p ut is dela ye d w i t h r e sp e c t to t h e i n p u t b y 1 00 s. th e f i l t er in g p r o c ess is sh o w n i n f i g u r e 20. 04633 -024 t 0 t gf t 0 t gf t 0 t gf t 0 t gf input input pulse shorter than glitch filter timeout input pulse longer than glitch filter timeout output programmed timeout programmed timeout input output f i gur e 2 0 . input gl it c h f i lt e r f u nct i on supply su pervisio n with vxn inputs the vx n in p u ts ha v e tw o f u n c tio n s. th ey c a n b e us ed as ei t h er su p p ly fa u l t dete c t o r s o r dig i t a l log i c in p u ts. w h e n s e le c t e d as a n a n alog (s fd) in p u t, t h e vx n p i n s ha v e ver y simila r f u n c - t i o n ali t y t o t h e vh an d vpn p i n s . th e ma jo r dif f er en ce is t h a t th e vx n p i n s ha v e o n l y o n e in p u t ra n g e: 0.573 v t o 1.375 v . ther efo r e , t h es e in p u t s can dir e c t l y s u p e r v is e onl y t h e v e r y lo w s u p p l i es. h o we ver , t h e i n pu t i m p e danc e o f t h e v x n pins i s hi g h , a l l o w i ng a n e x te r n a l re s i stor div i de ne t w ork to b e c o n n e c te d to t h e pin. t h us, a n y su p p ly c a n b e p o te n t ia l l y div i de d down in to t h e in p u t ra n g e o f t h e vx n p i n a nd s u p e r v is e d . this enab les t h e ad m1064 t o mo ni t o r o t h e r s u p p l ies s u c h as +2 4 v , +48 v , a nd ?5 v . a n add i t i ona l s u p p ly su p e r v is i o n f u nc t i on is a v ai l a bl e w h e n t h e v x n p i n s a r e s e lect ed a s d i g i tal i n p u t s . i n th i s ca se , th e a n alog f u n c tion is a v a i l a b l e as a s e con d det e c t o r o n e a ch o f th e dedi- ca ted analog in p u ts, vp1C4 and vh. th e a n al og f u n c tio n o f vx1 is ma p p e d t o vp1, vx2 is ma p p e d t o vp2, a nd s o o n . v x 5 is ma p p e d t o vh. i n t h is c a s e , t h es e s f ds c a n b e vi e w e d as a sec o n d a r y o r w a rn i n g s f d . the s e conda r y s f d s a r e f i xe d to t h e s a m e in put ra n g e as t h e p r ima r y s f d . t h e y a r e us e d t o indic a te wa r n ing le v e l s ra t h er tha n fa il ur e l e v e ls. this al lo ws fa u l ts and wa r n in gs t o be g e n e r - a t e d on a s i ng l e su p p ly u s ing on ly one p i n. f o r e x am pl e, if v p 1 is s e t t o o u t p u t a fa u l t if a 3.3 v s u p p l y dr o o ps to 3.0 v , vx1 can b e s e t t o ou t p u t a wa r n in g a t 3. 1 v . w a r n ing ou t p u t s a r e a v ai lab l e fo r r e ad b a ck f r o m t h e s t a t us r e g i s t ers. th e y a r e als o o r e d t o g e t h er an d fe d in t o t h e s e q u e n ci n g en g i n e (se), al l o win g w a r n i n g s to ge ne r a te i n te r r upt s on t h e pd os . t h e r e f ore, i n t h e exa m ple ab o v e , if t h e s u p p l y dr o o ps t o 3.1 v , a wa r n in g is gen e r a te d , an d rem e d i a l ac t i on ca n b e t a k e n b e fo r e t h e su p p ly d r op s out of to l e r a nc e.
ADM1064 rev. 0 | page 15 of 32 vxn pi ns as digi tal in puts a s m e n t ion e d p r evio us l y , t h e vx n in p u t p i n s on the ad m1064 h a v e d u al fun c tio n ali t y . th e seco n d fun c ti o n i s a s a di gi tal i n p u t t o th e de vice . th er ef o r e , th e ad m1064 ca n be co nf igur ed f o r u p t o f i v e dig i t a l i n p u ts. th es e in pu ts a r e t t l/c m os-co m p a t i b l e . s t a nda rd lo g i c sig n a l s ca n b e a pplie d to t h e p i n s : res e t f r o m r e se t g e n e ra t o r s , p w r g o o d s i gn al s , fa ul t f l a g s, m a n u al r e se ts , a nd s o o n . th e s e sig n als a r e a v ai la b l e as in p u ts to t h e s e , an d ca n b e us e d t o c o n t r o l t h e s t a t us o f t h e p d o s . th e i n p u ts can b e co nf igur ed t o det e c t ei th er a c h a n g e in leve l o r a n edge . w h en conf igur e d fo r le vel de te c t io n, t h e ou tp ut o f t h e d i g i t a l b l o c k is a b u f f er e d v e rsio n o f t h e in p u t. w h e n c o nf igur e d fo r e d ge de te c t ion, o n ce t h e lo g i c t r a n si t i on is dete c t e d , a p u ls e o f p r og ra mma b l e wi d t h is o u t p ut f r o m t h e dig i t a l b l o c k. th e wi d t h is p r og ra mma b l e f r o m 0 s t o 100 s. the dig i t a l b l o c ks fe a t ur e t h e s a m e g l i t ch f i l t er f u n c t i on t h a t is a v a i la b l e on t h e s f d s . this enables t h e us er t o ig n o r e s p ur io us tra n si ti o n s o n t h e in p u t s . f o r e x a m p l e , th e f i l t er ca n be use d t o d e bo un c e a m a n u al r e se t sw i t c h . w h en conf igur e d as dig i t a l i n pu ts, e a ch o f t h e vx n p i n s has a w e ak (10 a) pu l l -do w n c u r r en t s o ur ce a v a i lab l e fo r placin g t h e in p u t in a k n o w n con d i t io n, e v e n if lef t f l o a t i n g . the c u r r en t so u r c e , i f se l e ct e d , w e akl y p u ll s th e in p u t t o g n d . 04633-027 detector vxn (digital input) glitch filter vref = 1.4v to sequencing engine + ? f i gure 2 1 . vxn d i gita l input f u nct i o n
ADM1064 rev. 0 | page 16 of 32 outputs supply se quencing through configurable outpu t drivers s u p p l y s e q u en c i n g is ac hiev ed wi t h t h e ad m1 064 usin g th e p r og ra mma b l e dr i v er o u t p uts (p d o s) o n t h e de v i ce as con t r o l sig n als fo r s u p p lies. th e ou t p u t dr i v ers ca n be u s e d as log i c ena b les o r as fet dr i v ers. the s e q u e n c e i n w h ich t h e pd o s a r e as s e r t e d (a nd , t h er efo r e , t h e su p p lies a r e t u r n e d o n ) is con t r o l l e d b y t h e s e q u en c i n g en g i n e (s e). the s e det e r m in es wha t ac tio n is to be ta k e n wi t h the pd os bas e d on t h e condi t ion o f t h e in p u ts of t h e ad m106 4. ther efo r e , t h e pd o s can b e s e t u p t o as s e r t w h e n t h e s f d s a r e i n t o l e ra n c e , t h e co rr ect i n p u t s i gn al s a r e r e ce i v ed o n t h e v x n d i g i t a l pi ns , no w a r n i n g s are re c e ive d f r om an y of t h e i n put s of t h e de vice , and s o o n . th e pd os ca n b e us e d for a va r i ety o f f u nc t i ons . t h e pr i m ar y f u nc t i on i s to prov i d e e n abl e s i g n a l s f o r ld o s o r dc/dc co n v er t e rs, whic h g e n e ra te s u p p l ies lo cal l y o n a bo a r d . th e p d os ca n also be us e d t o p r o v id e a po w e r_go od sig n al w h en al l t h e s f d s a r e i n t o lera n c e , o r a r e s e t o u t p u t if one of t h e sf ds go e s out of sp e c i f i c a t i o n ( t h i s c a n b e u s e d a s a st a t us sig n a l fo r a ds p , f p ga, or o t her micr o c on t r ol ler ) . the p d o s can be p r og ra mm e d t o p u l l u p t o a n u m b er o f dif f er en t o p t i o n s. th e ou t p u t s c a n b e p r og ra mm e d as fol l o w s: ? o p en- d ra i n (al l o w in g t h e us er to co nn e c t a n ex t e r n al p u l l -u p re s i stor ) ? ope n -d ra in w i t h w e ak p u ll - u p t o v dd ? pus h /p u l l t o v dd ? ope n -d ra in w i t h w e ak p u ll - u p t o v p n ? pus h /p u l l t o vpn ? st rong pu l l - d ow n to g n d ? i n ter n a l ly cha r ge-p um p e d hig h dr i v e (12 v , pd o1C6 o n ly ) t h e l a st opt i o n ( a v a i l a b l e on ly on pd o 1 C 6 ) a l l o w s t h e u s e r to dir e c t l y dr i v e a v o l t a g e hi g h e n o u g h t o f u l l y enha n c e a n exter n al n-fet , w h ich is us e d t o is ol a t e , fo r exa m ple , a ca r d -side v o lt a g e f r om a b a ck p l ane su p p ly ( a pd o c a n su st ai n g r e a te r t h an 1 0 . 5 v in t o a 1 a lo ad). th e p u l l -do w n s w i t ch es can a l s o be us ed t o dr i v e st a t us le ds dir e c t ly . t h e d a t a d r i v i n g e a ch of t h e p d os c a n c o me f r om on e of t h re e so u r c e s . t h e so u r c e c a n be en a b l e d in t h e p n p d o c fg co nf igura t io n r e g i s t er (s ee t h e an-698 a p p l ic a t io n n o t e f o r det a i l s). the da t a s o ur ce s a r e ? o u tput f r om t h e se . ? dir e c t l y f r o m th e s m b u s. a pd o can be co nf igur ed s o tha t t h e s m bus has dir e c t co n t r o l o v er i t . this ena b les s o f t wa r e co n t r o l o f t h e pd o s . th er efo r e , a micr o c o n t r ol l e r ca n b e us e d t o in i t ia t e a s o f t wa r e p o w e r - u p /p o w er -do w n s e q u e n c e . ? on-chi p clo c k. a 100 kh z c l o c k is g e n e ra ted on the device . this clo c k ca n b e ma de a v a i la ble o n an y o f t h e pd os. i t c a n b e us e d , fo r exa m ple, t o clo c k an ext e r n a l de vic e such as a n led . by defa u l t, t h e p d o s a r e p u l l e d t o gnd b y a w e ak (20 k?) on- c h i p p u l l -down r e sis t o r . this is als o th e con d i t io n o f th e p d o s o n p o w e r - u p , u n t i l t h e co nf igu r a t io n is down l o ade d f r o m eepro m an d t h e p r o g r a m m e d s e t u p is l a tche d. th e o u t p u t s are a c t i vely pu l l e d l o w onc e a s u pply of 1 v or g r e a te r i s on v p n or v h . t h e output s re m a i n h i g h i m p e d a nc e pr i o r to 1 v a p p e ar i n g on v p n or v h . t h i s prov i d e s a k n ow n c o nd it i o n f o r t h e pd os d u r i ng p o w e r - u p . t h e in ter n a l p u l l -d o w n c a n b e o v er dr i v en w i t h a n ext e r n al p u l l - u p o f s u i t ab le v a l u e t i e d f r o m t h e pd o p i n t o t h e r e q u ir e d p u l l -u p v o l t a g e . the 20 k? r e sis t o r m u s t be acco u n t e d f o r in calc u l a t in g a s u i t a b le val u e . f o r exa m p l e , if p d on m u st b e p u l l ed u p t o 3.3 v , a nd 5 v is a v a i l - abl e as an e x te r n a l su p p ly , t h e pu l l -u p re s i stor v a l u e is g i ve n b y 3.3 v = 5 v 20 k?/( r up + 20 k?) ther efo r e , r up = (100 k? ? 66 k?)/3.3 = 10 k? 04633-028 pdo se data cfg4 cfg5 cfg6 s mbus dat a clk data 10 ? 20k ? 10 ? 20k ? vp1 sel vp4 10 ? 20k ? v dd v fet (pdo1-6 only) 20k ? f i g u re 22. p r og r a m m ab le d r ive r o u t p ut
ADM1064 rev. 0 | page 17 of 32 sequenci ng e ngi ne overview the ad m1064 s s e q u en cin g eng i n e (s e) p r o v ides th e us er wi t h p o w e r f u l a n d f l exi b le con t r o l o f s e q u en ci n g . th e s e im ple m e n ts a s t a t e machi n e co n t r o l o f t h e pd o o u t p u t s, wi t h s t a t e cha n g e s co n d i ti o n al o n in p u t ev en t s . s e p r ogra m s ca n en a b l e co m p l e x co n t r o l o f b o a r ds such as p o w e r - u p an d p o w e r - do w n s e q u e n c e co n t r o l, fa u l t e v en t handling, in t e r r u p t gen e ra t i o n o n w a r n in gs, a n d so o n . a w a t c h d og fun c ti o n th a t v e ri f i e s th e co n t in ued o p era t ion o f a pr o c es s o r clo c k c a n b e i n teg r a t e d in t o t h e s e p r ogra m . t h e s e ca n al so be co n t r o ll ed via th e s m b u s , gi v i n g s o f t w a re or f i r m w a re c o n t ro l of t h e b o ard s e qu e n c i ng . the s e s t a t e machine com p r i s e s 63 s t a t e ce l l s. e a ch s t a t e has t h e fol l o w in g a t t r ib u t es: ? m o n i t o r s si gn als i n d i ca tin g th e s t a t us o f th e 10 i n p u t p i n s , vp1 t o vp4, v h , a nd vx1 t o vx5. ? c a n b e en ter e d f r o m a n y o t h e r st a t e. ? thr e e exi t r o ut e s m o v e t h e s t a t e machi n e on t o a n e xt s t a t e: s e q u e n ce de te c t io n, fa u l t m o ni to r i n g , a nd t i me o u t. ? de la y tim e r s f o r th e se q u en ce a n d tim e o u t b l ock s ca n be p r o g r a mm e d i ndep e n d e n t l y , and cha n ge w i t h e a ch st a t e c h a n g e . th e rang e o f tim e ou ts is f r o m 0 m s t o 400 m s . ? o u t p u t co ndi t i on o f t h e 10 pd o p i n s is def i ne d an d f i xe d wi t h in a st a t e . ? t r ans i t i on f r om one s t ate to t h e ne x t i s m a d e i n l e ss t h an 20 s , wh i c h i s t h e tim e n eeded t o d o w n l o a d a s t a t e d e f i ni ti o n f r o m eep r o m t o th e s e . 04633-029 sequence timeout monitor fault state f i g u re 23. st at e ce l l the ad m1064 o f f e rs u p t o 63 s t a t e def i ni tio n s. the sig n als m o n i to r e d to i ndic a te t h e st a t us o f t h e in p u t pins a r e t h e output s of t h e sf ds . warnings the s e a l s o m o ni to rs wa r n i n gs. th e s e wa r n i n gs ca n b e g e n e r a t e d w h e n t h e ad c r e adi n gs viol a t e t h e i r limi t r e g i st er val u e o r w h en t h e s e conda r y v o l t a g e m o ni t o rs o n vp1C4 and v h . t h e w a r n i n g s are a l l or e d to ge t h e r an d are a v ai l a bl e a s a si n g le w a rn i n g in p u t t o ea c h o f th e th r e e b l oc k s th a t e n a b le exi t in g f r o m a st a t e . smbus jump/unconditional jum p the s e c a n b e fo r c e d t o ad v a n c e t o t h e n e xt s t a t e uncon d i t io n- al l y . this ena b le s t h e us er t o fo r c e t h e s e t o ad v a n c e . e x a m ples o f w h er e t h is mig h t b e us e d i n cl ude m o vin g t o a ma rg inin g s t a t e o r deb u g g i n g a s e q u ence . the s m bus j u m p o r g o -t o co mman d can b e s e en as an o t h e r in p u t t o s e q u e n ce an d t i m e out bl o c k s , w h i c h prov i d e a n e x it f r om e a c h st a t e. table 6. sampl e sequence state entries s t a t e s e q u e n c e t i m e o u t m o n i t o r idle1 if vx1 is low , go to state idle2. idle2 if vp1 is okay, g o to state en3v 3. en3v3 if vp2 is okay, g o to state en2v5. if vp2 is not okay after 10 ms, go to state dis3v3. if vp1 is not okay, go to state id le1. dis3v3 if vx1 is high, g o to state idle1. en2v5 if vp3 is okay, g o to state pwrg d. if vp3 is not okay after 20 ms, go to state dis2v5. if vp1 or v p 2 is not okay, go to state fsel2. dis2v5 if vx1 is high, g o to state idle1. fsel1 if vp3 is not okay, go to state di s2v5. if vp1 or v p 2 is not okay, go to state fsel2. fsel2 if vp2 is not okay, go to state di s3v3. if vp1 is not okay, go to state id le1. pwrgd if vx1 is high, g o to state dis2v5. if vp1, vp2, or v p 3 is not okay, go to state fsel1.
ADM1064 rev. 0 | page 18 of 32 sequencing engine application example the a p plic a t io n in t h is s e c t io n d e m o n s t r a t es t h e o p era t ion o f th e s e . f i gur e 24 s h o w s h o w th e si m p le b u ild i n g b l oc k o f a sin g le s e s t a t e c a n be us ed t o b u ild a p o w e r - u p s e q u en ce f o r a 3 - su p p ly s y ste m . t a b l e 7 lis t s t h e p d o o u t p u t s fo r e a ch s t a t e i n t h e s a me s e i m p l em en ta ti o n . i n th i s sys t em , th e p r e s en ce o f a g ood 5 v su p p ly o n vp1 a nd t h e v x 1 p i n held lo w a r e t h e t r ig gers re qu i r e d f o r a p o we r - up s e qu e n c e to st ar t . t h e s e qu e n c e i n te nd s t o t u r n o n t h e 3 . 3 v su p p l y next, then t h e 2. 5 v su p p l y ( a ss u m ing su c c e s s f u l t u r n - o n of t h e 3 . 3 v su p p ly ) . o n c e a l l t h re e su p p l i e s a r e g o o d , t h e p w r g d s t a t e is en t e r e d , w h er e t h e s e r e ma in s un t i l a f a u l t o c c u rs on one o f t h e t h r e e s u p p l i e s , o r i t is i n st r u c t e d t o g o thr o ug h a p o w e r - do wn s e q u en c e b y vx1 g o in g hig h . f a u l ts a r e deal t wi t h thr o ug h o u t th e p o w e r - u p s e q u en ce on a c a se- b y- ca se bas i s . t h e f o ll o w in g secti o n s , wh ic h d e sc ri be t h e indivi d u a l b l o c ks, us e t h is s a m p le a p plic a t ion to dem o nst r a t e th e sta t e mac h in e s ac tio n s. 04633-030 idle1 idle2 en3v3 dis3v3 dis2v5 pwrgd fsel1 fsel2 sequence states monitor fault states timeout states vx1 = 0 vp1 = 1 vp1 = 0 (vp1 + vp2) = 0 (vp1 + vp2 + vp3) = 0 (vp1 + vp2) = 0 vp2 = 1 vp3 = 1 vp2 = 0 vx1 = 1 vp3 = 0 vp2 = 0 vp1 = 0 vx1 = 1 vx1 = 1 10ms 20ms en2v5 f i g u re 24. s a mp le a p plic at i o n flow d i ag r a m table 7. pdo outputs for ea ch state pdo o u t p u t s i d l e 1 i d l e 2 e n 3 v 3 e n 2 v 5 d i s 3 v 3 d i s 2 v 5 p w r g d f s e l 1 f s e l 2 pdo1 = 3v3on 0 0 1 1 0 1 1 1 1 pdo2 = 2v5on 0 0 0 1 1 0 1 1 1 pdo3 = fault 0 0 0 0 1 1 0 1 1
ADM1064 rev. 0 | page 19 of 32 sequence detector the s e q u en c e det e c t o r b l o c k is us ed t o detec t w h en a st ep in a s e q u e n ce has b e en co m p le t e d . i t lo oks fo r o n e of t h e in p u ts t o t h e se to ch ang e st a t e, a nd i s mo st of te n u s e d a s t h e g a te on su c c e s s f u l p r o g r e ss t h rou g h a p o we r - u p or p o we r - dow n s e q u e n ce . a t i mer b l o c k is i n cl u d e d i n t h is de t e c t o r , w h ich c a n in s e r t dela ys in to a p o w e r - u p o r p o w e r - do wn s e q u en c e , if r e q u ir ed . t i m e r de l a ys can b e s e t f r o m 10 s t o 400 m s . f i gur e 25 is a b l o c k d i a g ram o f t h e s e q u e n ce de t e c t o r . 04633-032 supply fault detection logic input change or fault detection warnings force flow (unconditional jump) vp1 vx5 invert sequence detector select timer f i gure 25. s e q u ence d e te c t o r b l o c k d i agr a m the s e q u en c e det e c t o r can als o h e l p t o iden tif y m o ni t o r i n g fa u l ts. i n t h e s a m p le a p plic a t ion sh o w n in f i gu r e 24, t h e fs el1 a nd fs el2 s t a t es f i rs t iden t i f y whic h o f the vp1, vp2, o r vp3 p i n s h a s fa ul t e d , a n d th e n th e y ta k e th e a p p r o p ri a t e a c t i o n . moni tori n g fault de tector th e mon i tor i ng f a u l t de te c t or b l o c k i s u s e d to d e te c t a f a i l u r e o n a n in pu t. t h e log i ca l f u n c t i on im ple m en t i n g t h is is a w i de or ga te, w h ich ca n dete c t w h e n a n in pu t d e vi a t es f r o m i t s exp e c t e d condi t i o n . th e cle a r e st de m o n s t r a t ion o f t h e us e o f t h is b l o c k is i n t h e p w r g d s t a t e , w h er e t h e m o ni t o r b l o c k indic a t e s t h a t a fa i l ur e o n on e or m o r e o f t h e v p 1,vp2, o r vp3 in p u ts has o c c u r r e d . n o p r og ra mma b l e dela y is a v a i l a b l e in t h i s b l o c k, b e ca us e t h e t r ig ger i n g o f a fa u l t con d i t ion is li k e ly t o b e ca u s e d w h en a s u p p l y fal l s o u t o f t o lera n c e . i n this si t u a t ion, the us er w o u l d wa n t t o r e ac t as q u ick l y as p o ssib le. s o m e l a t e n c y o c c u rs w h e n mov i ng out of t h i s st ate, howe v e r , b e c a u s e it t a ke s a f i n i t e amou n t of t i me ( ~ 2 0 s ) f o r t h e st ate c o n f i g u r a t i o n to do wn lo ad f r o m eepro m in t o t h e s e . f i gur e 26 is a b l o c k di a g r a m o f t h e m o n i to r i n g f a u l t dete c t o r . 04633-033 supply fault detection logic input change or fault detection v p1 v x5 monitoring fault detector mask sense 1-bit fault detector fault warnings mask 1-bit fault detector fault mask sense 1-bit fault detector fault f i g u re 26. m o n i t o r i ng f a ul t detecto r bl ock dia g r a m timeou t d e tector t h e tim e o u t d e t e ct o r allo w s th e use r t o tra p a fa il ur e t o m a k e p r o p er p r og r e s s thr o ug h a p o wer - u p o r p o w e r - do wn s e q u en ce . i n t h e s a m p le a p plica t io n sh ow n in f i gur e 24, t h e t i me o u t n e xt - s t a t e tra n si ti o n is f r o m th e en 3v 3 a n d en 2v 5 s t a t e s . f o r th e en3v3 s t a t e , the sig n al 3v3o n is a s se r t ed u p o n e n tr y t o th i s st a t e ( o n t h e p d o 1 ou tp u t pin ) to t u r n on a 3 . 3 v su p p ly . this su p p ly r a i l is conn e c te d to t h e vp2 p i n, and t h e s e q u e n ce d e te c - t o r lo o k s f o r th e vp2 p i n t o g o a b o v e i t s uv thr e s h o l d , whic h is s e t in t h e su p p ly fa u l t dete c t o r (s fd) a t t a ch e d t o t h a t p i n. the p o w e r - u p s e q u ence p r og r e s s es w h e n t h is cha n g e is det e c t e d . i f , h o w e v e r , t h e s u p p ly fa i l s (p erha ps d u e t o a sh o r t ci r c ui t o v e r loa d i n g th i s s u p p l y), th en th e tim e o u t b l oc k tra p s th e p r o b lem . i n th i s e x a m p l e , i f th e 3. 3 v s u p p l y fa ils wi th in 10 m s , th en th e s e m o v e s t o th e d i s3v 3 s t a t e a n d t u rn s o f f th i s s u p p l y b y b r in g i n g p d o1 lo w . i t als o in dica t e s t h a t a f a u l t has o c c u r r ed b y takin g p d o3 hig h . t i m e o u t de l a ys o f f r o m 100 s t o 400 m s can b e p r og ra mm e d . fault reporting the ad m1064 has a f a u l t l a t c h f o r r e co r d in g fa u l ts. t w o r e g i s t ers a r e s e t aside fo r t h is p u r p os e . a sin g le b i t is as sig n e d to e a ch i n p u t o f t h e de vic e , a nd a f a u l t on t h a t in pu t s e ts t h e r e le van t b i t. th e co n t e n ts o f t h e fa u l t r e g i st er can b e r e ad o u t ove r t h e sm bu s to de te r m i n e w h i c h i n put ( s ) f a u l te d. t h e f a u l t r e gi s t e r ca n be en a b l e d/ d i sa b l ed i n ea ch s t a t e . th i s e n s u r e s th a t o n l y r e al fa u l ts a r e ca p t ur e d and n o t, f o r exa m p l e , un der v ol ta ge t r i p s w h e n t h e se is exe c u t in g a p o w e r - do w n s e q u en c e .
ADM1064 rev. 0 | page 20 of 32 voltage readback the ad m1064 has a n on-bo a rd 12-b i t acc u ra te ad c f o r v o l t a g e r e ad b a ck o v er t h e s m bus. th e ad c has a 12-cha n ne l a n a l og m u x o n t h e f r o n t e n d . th e tw e l ve cha n ne ls co n s ist o f t h e t e n s f d in p u ts (vh, vp1-4, vx1-5) an d tw o a u xilia r y (sin g l e- e n ded ) a d c in p u t s (a xu 1, a u x 2 ). an y o r all o f th e s e in p u t s ca n be se lect e d t o be r e ad , i n t u rn , b y th e a d c . t h e ci r c ui t co n t r o l l in g t h is o p er a t ion is ca l l e d r o und-r o b i n. the r o und- r o b i n cir c ui t can b e s e le c t e d to r u n t h r o ug h i t s lo o p o f co n v er- sio n s j u st on c e o r co n t in uo usly . a v era g in g is a l s o p r o v ide d fo r e a ch ch an n e l. i n t h i s c a s e , t h e ro u n d - ro bi n c i rc u i t r u ns t h rou g h it s l o op of c o n v e r s i ons 1 6 t i me s b e f o re re tu r n i n g a re su lt f o r e a ch cha n nel. a t t h e e nd o f t h is c y cle, t h e r e su l t s a r e a l l wr i t te n t o t h e o u t p ut r e g i s t ers. the a d c s a m p les sin g le-side d in p u ts wi t h r e s p e c t t o the a g nd pin. a 0 v in p u t g i v e s ou t c o de 0, an d a n i n p u t e q ua l to th e v o l t a g e on refin g i v e s o u t f u l l co de (4095 decimal). the i n p u ts to t h e ad c com e d i r e c t ly f r o m t h e vx n p i n s and f r o m th e ba ck o f th e i n p u t a t t e n u a t o r s o n th e vp n a n d vh p i n s , as sh o w n in f i g u r e 27 a nd f i gu r e 28. 04633 -025 v xn 2.048v vref no attenuation 12-bit adc digitized voltage reading f i gure 2 7 . adc readi n g on vxn p i ns 04633-026 2.048v vref attenuation networ k (depends on range selected) 12-bit adc digitized voltage reading v pn/vh f i gure 2 8 . adc readi n g on vp n / vh p i ns the vol t a g e a t t h e i n p u t p i n can b e der i ve d f r o m t h e fol l o w in g eq ua ti o n : v = 4095 code adc at t e n u a t i o n fa c t o r 2.04 8 v the a d c i n p u t v o l t a g e ra n g es fo r t h e s f d i n p u t ra n g es a r e lis t e d in t a b l e 8. table 8. adc i nput voltage r a nges sfd input range v attenuation fa ctor adc input vo lt age range v 0 . 5 7 3 C 1 . 3 7 5 1 0 C 2 . 0 4 8 1 . 2 5 C 3 2 . 1 8 1 0 C 4 . 4 6 2 . 5 C 6 4 . 3 6 3 0C6.0 1 4 . 8 C 1 4 . 4 1 0 . 4 7 2 0C14.4 1 ________ ______ ______ __ ________ ______ ______ __ ___ 1 t h e up per l imit is the abs o l u t e maximum al l o w e d v o l t age on thes e pins. the n o r m al wa y t o s u p p l y t h e refer e n c e t o t h e ad c on t h e refin p i n is t o sim p l y co nn e c t t h e ref o ut pin t o t h e refi n p i n. refo ut p r o v ides a 2.048 v r e f e r e n c e . a s s u c h , th e su p e r v ising ra nge co v e rs less t h a n ha lf o f t h e no r m a l ad c ra n g e . i t is p o ssib le , h o w e ver , t o p r o v ide t h e a d c w i t h a m o r e a c c u r a te e x te r n a l re f e re nc e f o r i m prove d re a d b a ck a c c u r a c y . s u p plies can a l s o b e co n n e c te d to t h e i n p u t p i ns p u r e ly fo r ad c r e a d ba ck , ev en t h o u gh t h ey m i g h t g o a b o v e t h e e x pect ed s u pe r - vis o r y ra n g e li mi ts ( b u t n o t ab o v e 6 v , b e c a us e t h is viol a t es t h e a b s o l u t e maxim u m ra t i n g s o n t h es e p i n s ). f o r in s t an c e , a 1.5 v su p p ly co n n e c te d to t h e vx1 p i n can b e co r r e c t l y r e ad o u t as an a d c c o d e o f ap p r ox i m at e l y 3 / 4 f u l l s c a l e , b u t i t a l w a y s s i t s ab ove a n y sup e r v i s or y l i m i t s t h at c a n b e s e t o n t h a t pi n . t h e maxim u m s e t t in g f o r th e refi n p i n is 2.048 v . suppl su pervision with the adc i n ad di t i on t o t h e r e a d b a ck c a p a b i li ty , a f u r t h e r le vel o f su p e r v i - sio n is p r o v ide d b y th e o n -c hi p 12-b i t ad c. the ad m1064 has limi t r e g i sters on w h ich t h e us e r ca n p r o g ra m to a max i m u m or mi n i m u m a l lo w a b l e t h r e sh ol d . e x ce e d ing t h e t h resh ol d ge ner a te s a wa r n in g t h a t c a n ei t h er b e r e ad b a ck f r o m t h e s t a t us r e g i s t ers o r in p u t in t o t h e s e t o det e r m in e wha t s e q u encin g ac tion the ad m1064 sh o u ld ta k e . onl y one r e g i s t er is p r o v ide d f o r eac h in p u t cha n nel, s o a uv o r o v t h r e sh old ( b u t no t b o t h ) can b e s e t fo r a g i ven cha n n e l. t h e r o und-r o b i n cir c ui t ca n b e en a b le d via an s m b u s wr i t e , o r i t can be p r og ra mm e d t o t u r n o n in an y s t a t e in the s e p r og ra m. f o r e x a m p l e , i t can b e s e t t o s t a r t on c e a p o w e r - u p s e quen ce is com p le t e an d al l s u p p lies a r e kn own t o b e w i t h i n exp e c t e d t o leran c e l i mi ts. n o t e t h a t a l a t e n c y is b u i l t in t o t h is su p e r v ision , dic t a t e d b y t h e co n v ersio n t i m e o f th e ad c. w i th al l 12 c h a n n e ls s e le c t e d , t h e t o tal tim e f o r th e r o un d- r o b i n o p e r a t i o n (a v e ra gi n g o f f ) i s a p p r o x ima t e l y 6 m s (500 s p e r c h a n n e l s e lec t e d ). s u p er visio n usin g t h e ad c, t h er efo r e , do es n o t p r o v i d e t h e s a me r e al t i m e re sp ons e a s t h e sf ds .
ADM1064 rev. 0 | page 21 of 32 appli c ations dia gram 04633-068 3.3v out 3.3v out vh pdo8 pdo9 system reset pdo7 signal_valid pdo6 power_good pdo2 pdo1 pdo5 pdo4 pdo3 en out dc-dc1 in 3.3v out 3v out 5v out 12v out en out dc-dc2 in 2.5v out en out dc-dc3 in en out ldo in 1.8v out 0.9v out 1.2v out 5v out 12v in 5v in 3v in vp1 3v out vp2 3.3v out vp3 2.5v out vp4 1.8v out vx1 1.2v out vx2 0.9v out vx3 power_on vx4 reset_l vx5 10 f refin 10 f vccp 10 f vddcap gnd pdo10 en out dc-dc4 in ADM1064 f i g u re 29. a p pl ic at i o ns d i ag r a m
ADM1064 rev. 0 | page 22 of 32 communicating with the ADM1064 configuration downlo ad at power-up the configuration of the ADM1064 (uv/ov thresholds, glitch filter timeouts, pdo configurations, and so on) is dictated by the contents of ram. the ram is comprised of digital latches that are local to each of the functions on the device. the latches are double-buffered and have two identical latches, latch a and latch b. therefore, when an update to a function occurs, the contents of latch a are updated first, and then the contents of latch b are updated with identical data. the advantages of this architecture are explained in detail in this section. the latches are volatile memory and lose their contents at power-down. therefore, the configuration in the ram must be restored at power-up by downloading the contents of the eeprom (nonvolatile memory) to the local latches. this download occurs in steps, as follows: 1. with no power applied to the device, the pdos are all high impedance. 2. when 1 v appears on any of the inputs connected to the vdd arbitrator (vh or vpn), the pdos are all weakly pulled to gnd with a 20 k? impedance. 3. when the supply rises above the undervoltage lockout of the device (uvlo is 2.5 v), the eeprom starts to download to the ram. 4. the eeprom downloads its contents to all latch as. 5. once the contents of the eeprom are completely downloaded to the latch as, the device controller signals all latch as to download to all latch bs simultaneously, completing the configuration download. 6. at 0.5 ms after the configuration download completes, the first state definition is downloaded from eeprom into the se. note that any attempt to communicate with the device prior to the completion of the download causes the ADM1064 to issue a no acknowledge (nack). updating the configuration after power-up, with all the configuration settings loaded from eeprom into the ram registers, the user might need to alter the configuration of functions on the ADM1064, such as chang- ing the uv or ov limit of an sfd, changing the fault output of an sfd, or adjusting the rise time delay of one of the pdos. the ADM1064 provides several options that allow the user to update the configuration over the smbus interface. the following options are controlled in the updcfg register: 1. update the configuration in real time. the user writes to ram across the smbus and the configuration is updated immediately. 2. update the latch as without updating the latch bs. with this method, the configuration of the ADM1064 remains unchanged and continues to operate in the original setup until the instruction is given to update the latch bs. 3. change eeprom register contents without changing the ram contents, and then download the revised eeprom contents to the ram registers. again, with this method, the configuration of the ADM1064 remains unchanged and continues to operate in the original setup until the instruction is given to update the ram. the instruction to download from the eeprom in option 3 is also a useful way to restore the original eeprom contents, if revisions to the configuration are unsatisfactory. for example, if the user needs to alter an ov threshold, this can be done by updating the ram register as described in option 1. however, if the user is not satisfied with the change and wants to revert to the original programmed value, then the device controller can issue a command to download the eeprom contents to the ram again, as described in option 3, restoring the ADM1064 to its original configuration. the topology of the ADM1064 makes this type of operation possible. the local, volatile registers (ram) are all double- buffered latches. setting bit 0 of the updcfg register to 1 leaves the double-buffered latches open at all times. if bit 0 is set to 0, then, when a ram write occurs across the smbus, only the first side of the double-buffered latch is written to. the user must then write a 1 to bit 1 of the updcfg register. this generates a pulse to update all the second latches at once. eeprom writes occur in a similar way. the final bit in this register can enable or disable eeprom page erasure. if this bit is set high, the contents of an eeprom page can all be set to 1. if low, then the contents of a page cannot be erased, even if the command code for page erasure is programmed across the smbus. the bitmap for the updcfg register is shown in the an-698 application note. a flow chart for download at power-up and subsequent configuration updates is shown in figure 30.
ADM1064 rev. 0 | page 23 of 32 04633 -035 power-up (v cc > 2.5v) eeprom e e p r o m l d d a t a r a m l d u p d smbus device controller latch a latch b function (ov threshold on vp1) f i g u re 30. conf ig ur at io n u p da te flow d i ag r a m updating the sequencing engine s e qu e n c i ng e n g i n e ( s e ) f u nc t i o n s are no t up d a t e d i n t h e s a me wa y as r e gu la r c o nf igura t io n la tc h e s. th e s e has i t s o w n de di ca te d 512 -b y t e eepro m fo r sto r in g st a t e d e f i ni t i o n s, p r o v idin g 63 individ u al s t a t es wi t h a 64 -b i t w o r d eac h (on e sta t e is r e s e r v e d ). a t p o w e r - u p , t h e f i rs t s t a t e is lo ade d f r o m t h e s e eep r o m in t o t h e e n g i n e i t s e lf. w h en t h e condi t i o n s o f t h is s t a t e a r e m e t, t h e n e xt st a t e is lo ade d f r o m eepr o m in t o t h e e n g i n e , a n d s o o n . t h e l o a d i n g o f e a c h n e w s t a t e t a k e s a p p r o x i - ma te l y 10 s. t o a l te r a st a t e, t h e re qu ire d change s m u st b e m a de dire c t ly to eep r o m. ram f o r ea c h s t a t e d o e s n o t e x i s t . t h e r e l eva n t al t e ra tion s m u st be made t o t h e 64-b i t w o r d , whic h is then u p lo aded dir e c t l y t o eep r o m. internal registers the ad m1064 co n t a i n s a la rg e n u m b er o f da ta r e g i s t ers. th e p r in ci p a l r e g i st e r s a r e t h e addr es s p o i n t e r r e g i s t er a nd t h e co nf igura t io n r e g i st ers. ad dress pointer r e gister this r e g i s t er con t a i n s t h e addr es s t h a t s e le c t s on e o f t h e o t h e r in t e r n al r e g i st ers. w h e n wr i t in g t o t h e ad m106 4, t h e f i rs t b y t e o f da t a is al wa ys a r e g i s t er addr es s, which is wr i t t e n t o t h e addr es s p o in ter r e g i s t er . c o nfigur ation r e gis t ers th e s e r e g i sters p r o v ide co n t r o l a nd co nf igur a t i o n fo r va r i o u s o p era t in g p a ram e t e rs o f th e ad m1064. eeprom the ad m1064 has tw o 512-b y te ce l l s o f n o n v ol a t ile , e l ec tr ical l y eras a b le , p r og ra mma b l e r e ad-onl y m e m o r y (eep r o m), f r o m reg i st er a d dr ess e s 0xf800 t o 0xfb ff . th e eepr o m is us ed f o r p e r m a n en t s t o r a g e o f da t a tha t is n o t los t w h en th e ad m1064 is p o w e r e d do w n . on e ee pro m cel l co n t a i n s t h e co nf igur a t io n da t a o f t h e de vi ce; t h e o t h e r con t a i n s t h e s t a t e def i ni t i on s fo r t h e se . a l t h ou g h re f e r r e d to a s re a d - o n l y me m o r y , t h e eepro m can b e wr i t t e n t o as w e l l as r e ad f r om v i a t h e s e r i a l b u s i n e x a c tl y th e sa m e wa y a s th e o t h e r r e gi s t er s. the ma jo r dif f e r en ces b e tw e e n t h e eep ro m and o t h e r r e g i s t ers a r e ? a n eep r o m lo ca ti o n m u s t b e b l a n k be f o r e i t ca n be w r it te n to . i f i t c o n t ai ns da t a , it m u st f i rst b e e r a s e d . ? w r it i n g t o e e p r o m i s s l ow e r t h a n w r it i n g t o r a m . ? w r i t i n g t o t h e e e p r o m sh o u ld b e r e s t r i c t e d , b e ca us e i t has a limi ted wr i t e/c y c l e lif e o f typ i cal l y 10,000 wr i t e o p era t io ns d u e to t h e us ual eepr o m w e a r -o ut me ch an i s ms . the f i rs t eep ro m is s p li t in t o 16 (0 t o 15) p a g e s o f 32 b y t e s eac h . p a g e s 0 t o 6, s t a r tin g a t a d dr es s 0xf800, h o ld th e co nf igura t io n da ta f o r the a p p l ica t ion s o n t h e ad m1064 (th e s f d s , p d o s , and s o o n ). th es e eep r o m addr e s s e s a r e t h e s a me as t h e r a m r e g i s t er addres s e s, p r ef ixe d b y f8. p a g e 7 is r e s e r v ed . p a g e s 8 t o 15 a r e f o r cus t o m er us e . d a t a can b e down lo ade d f r o m eepro m to r a m in on e o f t h e fol l o w ing w a y s : ? a t p o w e r - u p , w h en p a g e s 0 t o 6 a r e do wnlo ade d . ? by s e t t in g bi t 0 o f t h e u d o w nld r e g i st er (0xd8), w h ich p e r f o r m s a us er do wn lo ad o f p a ges 0 t o 6. serial bus interface the ad m1064 is co n t r o l l ed via th e s e r i al sys t em ma na g e m e n t b u s (s mb us). th e ad m1064 is co nnec t e d t o this b u s as a sla v e de vice , u n der t h e co n t r o l o f a mas t er de vice . i t t a k e s a p p r o x i- ma te l y 1 m s a f t e r p o w e r - u p f o r th e ad m1064 t o do wnlo ad f r o m i t s eep r o m. th er ef o r e , acces s t o the ad m1064 is r e - s t r i c t e d un t i l t h e do wnlo ad is c o m p let e d . identifying the ADM1064 on the smbus the ad m1060 has a 7-b i t s e r i a l b u s s l a v e addres s. the device is p o w e r e d u p wi t h a def a u l t s e r i a l b u s addr ess. t h e f i ve m s bs o f th e addr es s a r e s e t t o 01101; th e tw o ls bs a r e det e r m in ed b y t h e lo g i ca l st a t e s o f pin s a1 an d a0. this a l lo ws t h e co nne c t io n o f f o ur ad m1064s t o o n e s m b u s.
ADM1064 rev. 0 | page 24 of 32 t h e devi ce al so h a s sev e ral i d en ti f i ca ti o n r e gi s t er s (r ea d - o n l y ), whic h can b e r e ad acr o s s the s m b u s. t a b l e 9 lis t s th e s e r e g i st e r s w i th th e i r v a l u e s a n d fun c t i o n s . table 9. i d entification regi s t er va lues a n d f u nct i ons name addres s value functio n manid 0xf4 0x41 manufacturer id for analog devices revid 0xf5 0x00 silicon rev i sion mark1 0xf6 0x00 s/w brand mark2 0xf7 0x00 s/w brand general smb u s timing f i gur e 31, f i gur e 32, a nd f i gur e 33 a r e timin g dia g ram s f o r g e n e ral r e ad and wr i t e o p er a t ion s usin g t h e s m bus. th e s m bu s sp e c if ic a t ion de f i n e s sp e c if ic con d i t io ns fo r dif f er en t ty p e s o f r e ad an d wr i t e o p era t io ns, w h i c h a r e dis c us s e d in t h e w r i t e o p era t io n s an d re a d o p era t io ns s e c t io n s . the g e n e ral s m bus p r o t o c ol o p era t es as fol l o w s: 1. the mas t er ini t i a t e s da t a t r an sfer b y es t a b l is hing a s t a r t co ndi t i on, def i ne d as a hig h -to - lo w t r a n si t i o n on t h e s e r i a l da t a -li n e sd a, w h i l e t h e s e r i al clo c k-li n e s c l r e ma in s h i gh . t h is in d i ca t e s tha t a da t a s t r e a m f o llo w s. all s l a v e p e r i pherals co nn e c te d t o t h e s e r i al b u s r e s p on d t o t h e st a r t co n d i ti o n a n d sh i f t in th e n e xt 8 b i ts, co n s i s ti n g o f a 7- b i t sla v e ad dr ess (ms b f i rst) pl us a r/ w bi t . t h i s bi t d e t e r - mi n e s t h e dir e c t io n o f t h e da t a t r a n sfer , t h a t is, w h et her da ta is wr i t t e n to o r r e ad f r o m th e sla v e de vice ( 0 = wr i t e , 1 = r e ad). the p e r i ph eral w h os e addr es s c o r r es p o n d s t o t h e t r an smi t - te d a ddr ess r e sp o n ds b y p u l l in g t h e d a t a li ne lo w d u r i n g th e lo w pe ri od be f o r e th e n i n t h c l oc k p u lse , kn o w n a s t h e ac kn o w le dg e b i t, a nd h o ldin g i t lo w d u r i n g th e hig h p e r i o d o f this c l o c k p u ls e . a l l o t h e r de vi ce s o n t h e b u s r e ma in i d le w h i l e t h e s e le c t e d de vice wa i t s f o r da ta t o be r e ad f r o m o r wr i t t e n to i t . i f th e r/ w b i t is a 0, t h e mas t er wr i t es t o t h e sla v e de vi ce. i f t h e r/ w b i t is a 1, t h e mas t er r e ads f r o m t h e s l a v e de vi ce . 2. da t a i s sen t o v e r th e se ri al b u s in seq u en c e s o f n i n e c l oc k pu l s e s , e i g h t bit s of d a t a f o l l owe d by an a c k n ow l e d g e bit f r o m th e sla v e devi ce . d a ta tra n si ti o n s o n th e da ta li n e m u s t oc cu r d u rin g th e l o w pe riod o f th e c l oc k s i gn al a n d re m a i n s t abl e du r i ng t h e h i g h p e r i o d , b e c a u s e a l o w - to - h i gh tra n si ti o n wh e n th e c l oc k i s h i gh mi gh t be i n t e r p r e t e d as a s t o p sig n al . i f t h e o p er a t ion is a wr i t e o p er a t io n, t h e f i rs t da t a b y t e a f t e r t h e s l a v e addr es s is a co mmand b y t e . this te l l s t h e sla v e de vic e w h a t to exp e c t n e xt. i t mig h t b e a n inst r u c t io n te l l in g t h e sla v e de vice t o exp e c t a b l o c k wr i t e , o r i t mig h t sim p l y b e a r e g i s t er addr es s t h a t te l l s th e s l a v e w h er e sub s e q uen t da t a is to b e wr i t t e n. b e ca us e da t a ca n f l o w in o n ly o n e dir e c t io n, a s def i ne d b y t h e r/ w bit , s e ndin g a co m m a nd to a sl a v e de vice d u r i n g a r e ad o p era t ion is n o t p o ssi b le . b e fo r e a r e ad o p er a t ion, i t m i g h t b e ne c e ss ar y to p e r f or m a w r i t e op e r a t i o n to tel l t h e s l a v e w h a t s o r t o f r e ad o p era t io n t o exp e c t an d/o r t h e addr es s f r o m whic h da t a is t o b e r e ad . 3. w h en al l da ta b y t e s ha v e been read o r wr i t t e n, st o p co ndi - t i o n s a r e es t a b l i s h e d . i n wr i t e mo de , t h e mast er p u l l s t h e d a t a li ne hig h d u r i n g t h e 10t h clo c k p u ls e t o ass e r t a st o p co n d i ti o n . i n r e a d m o de , th e ma s t e r de v i ce r e le a s e s th e s d a li ne d u r i ng t h e lo w p e r i o d b e fo r e t h e n i n t h clo c k p u ls e , b u t t h e sl a v e de vice do es n o t p u l l i t lo w . this is kn o w n as n o ackn o w le dge . th e mas t er t h en t a k e s t h e da t a lin e lo w d u r i n g th e lo w p e r i o d bef o r e the t e n t h c l o c k p u ls e , t h e n hig h d u r i ng t h e ten t h clo c k p u ls e t o ass e r t a st o p co ndi t i on. 04633 -036 19 9 1 19 1 9 start by master ack. by slave ack. by slave ack. by slave ack. by slave frame 2 command code frame 1 slave address frame n data byte frame 3 data byte scl sda r/w stop by master scl (continued) sda (continued) d7 a0 a1 1 1 1 0 0 d6 d5 d4 d3 d2 d1 d0 d7 d6 d5 d4 d3 d2 d1 d0 d7 d6 d5 d4 d3 d2 d1 d0 f i g u re 31. gen e r a l sm bus w r ite tim i n g d i ag r a m
ADM1064 rev. 0 | page 25 of 32 9 04633-037 19 9 1 19 1 start by master ack. by slave ack. by master ack. by master no ack. frame 2 data byte frame 1 slave address frame n data byte frame 3 data byte scl sda r/w stop by master scl (continued) sda (continued) d7 a0 a1 1 1 1 0 0 d6 d5 d4 d3 d2 d1 d0 d7 d6 d5 d4 d3 d2 d1 d0 d7 d6 d5 d4 d3 d2 d1 d0 f i g u re 32. gen e r a l sm bus r e ad ti m i n g d i ag r a m 04633-038 scl sda ps s p t su ; s t o t hd; s t a t su; s t a t su ; d a t t hd; dat t hd ; s t a t hi g h t buf t lo w t r t f f i gure 33. s e ri al bu s t i ming d i agr a m smbus protocols for ram and eeprom the ad m1064 co n t a i n s v o l a til e r e g i s t ers (ram) a nd n o n v ola - t i le r e g i s t ers (eep r o m). u s er r a m o c c u p i es addr es s lo c a t i o n s f r o m 0x00 t o 0xd f ; eep r o m o c c u p i es addr ess e s f r o m 0xf800 t o 0xfb ff . d a t a can b e wr i t te n to and r e ad f r o m b o t h r a m a nd eeprom as sin g le da t a b y tes. d a t a can b e wr i t te n o n ly to un p r o g r a mm e d eepr o m lo ca t i o n s. t o wr i t e ne w d a t a t o a p r og ra mme d lo c a - t i o n , i t m u s t f i rst b e er as e d . eep r o m eras ur e cann ot b e don e a t th e b y te lev e l . th e eepr o m is a r ra n g ed as 32 p a g e s o f 32 b y t e s e a ch, an d an e n t i r e p a ge m u st b e eras e d . p a g e eras ur e is ena b le d b y s e t t i n g bi t 2 i n t h e up d c fg r e g i s t er (a ddr es s 0x90) t o 1. i f this b i t is n o t s e t, p a g e er as ur e ca nn ot o c c u r , ev en if the co mmand b y te (0xfe) is p r ogra mmed acr o s s th e s m b u s. write oper ations the s m bus sp e c if ica t ion def i n e s s e v e ra l p r o t o c ols fo r dif f e r en t t y p e s of re a d a n d w r ite op e r a t i o ns . t h e f o l l ow i n g abbr e v i a t i o n s a r e us e d i n t h e di a g ra m s : s s t a r t p s t o p r r e a d w w r i t e a a c kno w l e d g e a no acknowledge the ad m1064 us es th e f o l l o w in g s m b u s wr i t e p r o t o c ols. send byte i n a s e n d b y te op era t ion, t h e mas t er de vice s e nds a sin g le c o mma nd b y te to a sl a v e d e v i c e , a s fol l ow s : 1. the mas t er de v i ce as s e r t s a s t a r t co n d i t ion o n sd a. 2. the mas t er s e nds t h e 7 - b i t sla v e addr es s fol l o w e d b y t h e wr i t e b i t (lo w ). 3. the addr es s e d sla v e de vic e as s e r t s a c k o n s d a. 4. the ma ster s e nds a co mm a nd co de. 5. the s l a v e as s e r t s a c k on s d a. 6. the ma st er ass e r t s a st o p con d i t io n o n s d a an d t h e tra n sa cti o n en ds. i n t h e ad m106 4, th e s e nd b y t e p r o t o c ol is us ed f o r tw o pu r p o s e s : ? t o wr i t e a r e g i s t er addr es s t o r a m fo r a s u bs e q uen t sin g le b y t e r e ad f r o m t h e s a me ad dr ess , o r a b l o c k r e ad o r wr i t e st a r t i n g a t t h a t addr ess, as sh ow n in f i gur e 34. 04633 -039 24 13 slave address register address (0x00 to 0xdf) sw a a 5 6 p f i gure 34. s e tting a r a m a ddr ess for s u bsequent read
ADM1064 rev. 0 | page 26 of 32 5 6 p ? t o e r a s e a p a ge of e e p rom me mor y . e e p rom me mor y ca n be wr i t t e n to o n l y if i t is un p r og ra mm e d . b e f o r e w r i t i n g to o n e o r more e e p rom me mor y l o c a t i ons t h a t a r e alr e ad y p r og ra mme d , t h e p a g e o r p a g e s co n t a i nin g th ose loca ti o n s m u s t f i r s t be e r ased . eep r o m m e m o r y i s eras e d b y wr i t ing a co mmand b y t e . the ma ster s e nds a co mm a nd co de t h a t tel l s t h e sla v e de vice t o eras e t h e p a ge . th e ad m1064 co mma nd co de f o r a p a g e eras ur e is 0xfe (1111 11 10). n o t e tha t , f o r a p a g e eras ur e t o t a k e place , t h e p a g e addr es s has t o b e g i v e n i n t h e p r e v i o u s wr i t e w o rd t r a n s a c t io n (s e e t h e w r i t e by te/w o r d s e c t i o n). a l s o , bi t 2 i n t h e upd c f g r e g i ster (a ddr es s 0x90) m u s t be s e t t o 1. 04633 -040 24 13 slave address command byte (0xfe) sw a a f i gur e 3 5 . eep r o m p a g e er a s ur e a s s o on as t h e ad m1064 r e ceiv es th e command b y t e , p a g e eras ur e b e g i n s . the mas t er de v i ce can s e n d a sto p co mman d as s o o n as i t s e n d s t h e co mmand b y te. p a ge eras ur e ta k e s a p p r o x ima t e l y 20 m s . i f th e ad m 1064 is acces s e d bef o r e eras ur e is co m p let e , i t r e s p on ds wi t h a n o ack n o w le dge (n a c k). write byte/word i n a wr i t e b y t e / w o r d o p era t io n, t h e mas t er de vi ce s e n d s a c o mma nd b y te and one or t w o d a t a b y te s to t h e sl a v e d e v i c e , a s fol l o w s: 1. the mas t er de v i ce as s e r t s a s t a r t co n d i t ion o n sd a. 2. the mas t er s e nds t h e 7 - b i t sla v e addr es s fol l o w e d b y t h e wr i t e b i t (lo w ). 3. the ad dr ess e d sla v e de vic e ass e r t s a c k o n s d a. 4. the ma ster s e nds a co mm a nd co de. 5. the sl a v e ass e r t s a c k on s d a. 6. the ma ster s e nds a da t a b y te. 7. the sl a v e ass e r t s a c k on s d a. 8. the ma ster s e nds a da t a b y te (or ass e r t s a sto p co ndi t i on a t t h is p o in t). 9. the sl a v e ass e r t s a c k on s d a. 10. the mas t er ass e r t s a s t o p con d i t io n o n s d a t o e nd t h e tra n sa cti o n . i n t h e ad m106 4, t h e wr i t e b y te /w o r d p r o t o c ol is us e d fo r t h r e e pu r p o s e s : ? t o wr i t e a sin g l e b y t e o f da t a t o ram. i n this c a s e , the co mman d b y t e is th e r a m addr es s f r o m 0x00 t o 0xd f a n d th e o n l y da ta b y t e i s th e a c t u al da ta , as sh o w n i n f i gur e 36. 04633 -041 slave address ram address (0x00 to 0xdf) s w a data ap a 24 13 5 7 6 8 f i g u re 36. sing le b y te writ e t o r a m ? t o s e t u p a 2-b y t e eepro m a d dr ess fo r a subs e q uen t r e a d , wr i t e, b l o c k r e a d , b l o c k wr i t e, o r p a ge eras e. i n t h is cas e , t h e c o m m a n d by t e i s t h e h i g h by t e of t h e e e p r o m a d d r e s s f r om 0 x f 8 to 0 x f b . the on ly d a t a b y te i s t h e l o w b y te of t h e eepro m a ddr ess, as sh o w n in f i gur e 37. 04633-042 slave address eeprom address high byte (0xf8 to 0xfb) sw a eeprom address low byte (0x00 to 0xff) ap a 24 13 5 7 6 8 f i g u re 37. s e t t i ng a n e e p r o m addr es s n o t e , f o r p a g e eras ur e , tha t bec a us e a p a ge co nsis ts o f 32 b y t e s, o n l y t h e t h r e e ms bs o f t h e addr es s lo w b y t e a r e im p o r t an t. the lo w e r f i v e b i ts of t h e eep r o m addr es s lo w b y te sp e c if y t h e addr ess e s w i t h i n a p a ge an d a r e ig n o r e d d u r i n g a n eras e o p era t ion. ? t o wr i t e a sin g l e b y t e o f da t a t o eep r o m. i n t h is cas e , th e c o m m a n d by t e i s t h e h i g h by t e of t h e e e p r o m a d d r e s s f r om 0 x f 8 to 0 x f b . the f i rst d a t a b y te i s t h e l o w b y te of t h e eepro m addr e s s, a nd t h e s e cond d a t a b y te is t h e ac t u a l da ta , as sh o w n in f i gur e 38. 04633-043 slave address eeprom address high byte (0xf8 to 0xfb) sw a eeprom address low byte (0x00 to 0xff) ap a 24 13 5 7 a 9 data 8 6 1 0 f i g u re 38. sing le b y te writ e t o e e p r o m block w r ite i n a b l o c k wr i t e o p era t ion, t h e mas t er de vice w r i t es a b l o c k o f d a t a t o a sl a v e d e v i ce. t h e st a r t addr ess fo r a b l o c k wr i t e m u st ha v e been s e t p r evio u s l y . i n t h e ad m1064, a s e nd b y t e o p er a - t i o n s e ts a r a m addr ess, an d a wr i t e b y t e /w o r d o p era t ion s e ts a n eep r o m addr es s, as f o llo w s : 1. the mas t er de v i ce as s e r t s a s t a r t co n d i t ion o n sd a. 2. the mas t er s e nds t h e 7 - b i t sla v e addr es s fol l o w e d b y t h e wr i t e b i t (lo w ). 3. the addr es s e d sla v e de vic e as s e r t s a c k o n s d a. 4. the ma ster s e nds a co mm a nd co de t h a t tel l s t h e sla v e de vice t o exp e c t a b l o c k wr i t e . th e ad m1064 c o mman d co de f o r a b l o c k wr i t e is 0xfc ( 1111 1100).
ADM1064 rev. 0 | page 27 of 32 5. the sl a v e ass e r t s a c k on s d a. 6. the mas t er s e nds a da t a b y t e t h a t te l l s t h e s l a v e de vice h o w ma n y d a t a b y t e s a r e b e i n g s e n t . the s m bus sp e c if ica t ion a l lo ws a maxim u m o f 32 d a t a b y t e s in a b l o c k wr i t e. 7. the sl a v e ass e r t s a c k on s d a. 8. the ma ster s e nds n da t a b y tes. 9. th e sl a v e a s s e r t s a c k on sd a af te r e a ch d a t a b y te. 10. the mas t er ass e r t s a s t o p con d i t io n o n s d a t o e nd t h e tra n sa cti o n . 04633 - 0 44 slave address sw a 2 command 0xfc (block write) 4 13 a 5 byte count 6 a 7 a 9 1 0 a p a data 1 8 data n data 2 f i g u re 39. bl ock w r ite to e e p r o m or r a m u n li k e s o m e ee p r o m devices tha t limi t b l o c k wr i t es t o wi thin a p a g e b o u nda r y , t h er e is n o li mi t a t i on o n t h e s t a r t addr es s w h en p e r f o r min g a b l o c k wr i t e t o eepro m, excep t ? ther e m u s t b e a t le as t n lo c a t i on s f r o m t h e s t a r t addr es s t o t h e h i g h est eepro m addr ess ( 0 x f bf f ) , to a v o i d wr i t in g to in v a lid a ddr ess e s. ? i f th e addr es s e s cr os s a p a g e bounda r y , bo th p a g e s m u s t be eras e d b e fo r e p r o g ra mmin g . n o t e tha t t h e ad m1064 f e a t ures a c l o c k ext e nd f u n c tion f o r wr i t es t o eep ro m. p r og ra mmin g a n ee p r o m b y t e ta k e s a p p r o x ima t e l y 250 s, whic h w o u l d limi t t h e s m b u s c l o c k f o r r e p e a t e d o r b l o c k wr i t e o p er a t ion s . th e a d m10 64 p u l l s scl lo w a n d ext e n d s t h e clo c k p u ls e w h en i t c a nn o t accep t an y more d a t a . read oper ations the ad m1064 us es th e f o l l o w in g s m b u s r e ad p r o t o c ols. recei v e byte i n a r e ce i v e b y te o p era t ion, t h e mas t er de vice re cei v es a si n g le b y t e f r o m a sl a v e de vic e , as fol l o w s: 1. the mas t er de v i ce as s e r t s a s t a r t co n d i t ion o n sd a. 2. the mas t er s e nds t h e 7 - b i t sla v e addr es s fol l o w e d b y t h e re a d bit ( h i g h ) . 3. the addr es s e d sla v e de vic e as s e r t s a c k o n s d a. 4. the mas t er r e ce i v es a da t a b y te . 5. the mas t er ass e r t s n o ack n o w le dg e o n s d a . 6. the mas t er ass e r t s a s t o p con d i t io n o n s d a, and t h e tra n sa cti o n en ds. i n t h e ad m106 4, th e r e cei v e b y t e p r o t o c ol is us ed t o r e ad a s i ng l e by te of d a t a f r om a r a m or e e p rom l o c a t i on w h o s e addr ess has p r e v io usly b e en s e t b y a s e nd b y te o r wr i t e b y te/w o r d op er a t io n, a s sh o w n in f i gur e 40. 04633 -045 23 14 5 slave address s r data p a 6 a f i g u re 40. sing le b y te r e ad f r om e e p r o m or r a m block r e ad i n a b l o c k r e a d o p era t ion, t h e mast er d e vice re ads a b l o c k o f d a t a f r o m a sl a v e de vic e . t h e st a r t addr ess fo r a b l o c k r e ad m u st ha v e been s e t p r evio u s l y . i n t h e ad m1064, this is do ne b y a s e nd b y te op er a t io n to s e t a r a m addr ess, o r a wr i t e b y te/w o r d o p era t ion t o s e t a n eep r o m addr es s. th e b l o c k r e ad o p era t io n i t s e l f c o ns i s t s of a s e nd b y t e op e r a t i o n t h a t s e nd s a bl o c k re a d c o mmand to t h e sl a ve, i m me d i a t ely fol l owe d b y a re p e a t e d s t ar t a nd a r e a d o p er a t io n t h a t r e ads o u t m u l t i p le da t a b y tes, as fol l o w s: 1. the mas t er de v i ce as s e r t s a s t a r t co n d i t ion o n sd a. 2. the mas t er s e nds t h e 7 - b i t sla v e addr es s fol l o w e d b y t h e wr i t e b i t (lo w ). 3. the addr es s e d sla v e de vic e as s e r t s a c k o n s d a. 4. the ma ster s e nds a co mm a nd co de t h a t tel l s t h e sla v e de vice t o exp e c t a b l o c k r e ad . th e ad m1064 c o mman d co de f o r a b l o c k r e ad is 0xfd (1111 1101). 5. the s l a v e as s e r t s a c k on s d a. 6. the mas t er ass e r t s a r e p e a t s t a r t co n d i t ion o n sd a. 7. the mas t er s e nds t h e 7 - b i t sla v e addr es s fol l o w e d b y t h e re a d bit ( h i g h ) . 8. the s l a v e as s e r t s a c k on s d a. 9. the ad m1064 s e n d s a b y t e -coun t da ta b y t e tha t te l l s th e mas t er h o w man y da t a b y t e s t o exp e c t . th e ad m1064 al wa ys r e t u r n s 3 2 da ta b y t e s (0x 20), whic h is t h e maxim u m a l lo w e d b y t h e smbus 1.1 sp e c if ica t ion. 10. the mas t er ass e r t s a c k o n s d a. 11. the mas t er r e ce i v es 32 da t a b y tes. 12. the mas t er ass e r t s a c k o n s d a a f t e r e a ch da t a b y t e . 13. the mas t er ass e r t s a s t o p con d i t io n o n s d a t o e nd t h e tra n sa cti o n .
ADM1064 rev. 0 | page 28 of 32 04633 -046 slave address sw a 2 command 0xfd (block read) 4 13 a 5 s 6 slave address 7 byte count 91 0 1 2 11 a ra 8 data 1 data 32 13 a 14 p a f i g u re 41. bl ock r e ad f r om e e p r o m o r r a m error corr ecti on the ad m1064 p r o v ides the o p t i o n o f is s u in g a p e c (p ac k e t e r ror c o r r e c t i on) b y te af te r a w r i t e to r a m , a w r i t e to eepro m, a b l o c k wr i t e t o r a m/eepro m, o r a b l o c k r e a d f r o m r a m/eepr o m. this enab les t h e us er t o v e r i f y t h a t t h e da ta r e cei v e d b y o r s e n t f r o m t h e ad m1064 is c o r r ec t. th e p e c b y t e is a n o p tional b y t e s e n t a f t e r th a t las t da ta b y t e h a s been wr i t t e n t o o r r e ad f r o m the ad m1064. th e p r o t o c ol is as fol l o w s: 1. the ad m1064 is s u es a p e c b y t e t o the mas t er . the mast er ch e c ks t h e pec b y t e an d issues a n o t h e r b l o c k r e ad , if t h e pe c b y te is i n c o r r e c t. 2. a no a c k n ow l e dge ( n a c k ) i s ge ne r a te d af te r t h e pe c b y te t o si gn al th e en d o f th e r e ad . n o t e tha t t h e pec b y t e is calc u l a t ed usin g c r c-8. th e f r am e ch e c k s e q u e n c e (fcs) co nfo r m s t o cr c-8 b y t h e p o l y n o mial c ( x ) = x 8 + x 2 + x 1 + 1 s e e t h e s m bus 1.1 sp e c if ic a t ion fo r det a i l s. an exa m ple o f a b l o c k r e ad wi t h t h e o p t i o n al pec b y t e is s h own in f i gur e 42. 04633 -047 slave address sw a 2 command 0xfd (block read) 4 13 a 5 s 6 slave address 7 byte count 91 0 1 2 11 a ra 8 data 1 data 32 a 13 pec 14 a 15 p a f i g u re 42. bl ock r e ad f r om e e p r o m o r r a m wit h pe c
ADM1064 rev. 0 | page 29 of 32 outline dimensions 1 40 10 11 31 30 21 20 4.25 4.10 sq 3.95 top view 6.00 bsc sq pin 1 indicator 5.75 bcs sq 12 max 0.30 0.23 0.18 0.20 ref seating plane 1.00 0.85 0.80 0.05 max 0.02 nom coplanarity 0.08 0.80 max 0.65 typ 4.50 re f 0.50 0.40 0.30 0.50 bsc pin 1 indicator 0.60 max 0.60 max 0.25 min exposed pad (b o t t o m view) compliant to jedec standards mo-220-vjjd-2 f i gure 43. 4 0 -l ead l e ad f r a m e ch ip s c a l e p a ck ag e [lfcs p ] (c p - 4 0 ) di me nsio ns sho w n i n mi ll im e t e r s 0.50 bsc 0.27 0.22 0.17 9.00 bsc sq 1.05 1.00 0.95 7.00 bsc sq 1.20 max 0.20 0.09 top view (pins down) 1 12 13 25 24 36 37 48 seating plane 0.75 0.60 0.45 pin 1 view a 0.08 max coplanarity view a rotated 90 ccw seating plane 0 min 7 3. 5 0 0.15 0.05 compliant to jedec standards ms-026abc f i g u re 44. 4 8 -l ead thin plas t i c q u ad flat p a ck ag e [ t qfp ] (su - 48) di me nsio ns sho w n i n mi ll im e t e r s ordering guide model temperature r a nge package descri ption package option ADM1064acp ?40c to +85c 40-lead lfcsp cp-40 ADM1064acp- r eel ?40c to +85c 40-lead lfcsp cp-40 ADM1064acp- r eel7 ?40c to +85c 40-lead lfcsp cp-40 ADM1064asu ?40c to +85c 48-lead tqfp su-48 ADM1064asu-r eel ?40c to +85c 48-lead tqfp su-48 ADM1064asu-r eel7 ?40c to +85c 48-lead tqfp su-48 eval-ad m1064 lfeb ADM1064 evaluation kit (lfscp version) eval-ad m1064 t q e b ADM1064 evalua tion kit (tqfp version)
ADM1064 rev. 0 | page 30 of 32 notes
ADM1064 rev. 0 | page 31 of 32 notes
ADM1064 rev. 0 | page 32 of 32 notes ? 2004 analo g de vices, inc. all rights reserve d . tra d em arks and registered tra d ema r ks are the prop erty of their respective owners . d04633C0C 10/04(0)

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