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1 o ct o b e r 1 2 , 1 9 98 u637256 preliminary capstore 32k x 8 nvsram p in c on f ig u r a t ion p in d esc r ip t ion t o p v i e w 1 a 1 4 v c c 28 2 a 1 2 w 27 4 a6 a 8 25 5 a5 a 9 24 3 a7 a 1 3 26 6 a4 a 1 1 23 7 a3 g 22 8 a2 a 1 0 21 1 2 d q 1 d q 5 17 9 a1 e 20 1 0 a0 d q 7 19 1 1 d q 0 d q 6 18 1 3 d q 2 d q 4 16 1 4 vss d q 3 15 pdip si g n a l n a m e s ig n a l d e s c ri p ti o n a 0 - a 1 4 a d d r e s s i n p u t s d q 0 - d q 7 da t a i n / o u t e ch i p e na b le g o u t p u t e n a b l e w w r i t e e n a b le v c c p ow e r s u pp l y v o l t age vss g r o u n d f eat u r e s s c m o s n o n - v o l at i le s ta t ic r am 3 2 7 6 8 x 8 b i t s s 7 0 n s a cc e ss t i me s 3 5 n s ou t p u t e n a b l e a c ce s s t i me s i cc = 1 5 ma at 2 0 0 ns c y c l e t i m e s u n li mi t e d r e a d a n d w r i t e c yc l e s to sr a m s a ut o m a t ic st o re t o e epr o m o n p o w e r d o wn u s i n g c h a r g e s t o r e d i n a n i n t e g r a t e d c a p a c i t or s s of t ware i ni t i a ted st o re s a u t om a t i c s t or e t im i n g s 10 5 st o r e c y c l es t o e epr o m s 1 0 y e a r s da t a r e t en t i o n i n e eprom s a u t o m a t i c reca l l o n p o w e r up s s of t ware r e c all i n it i a t i o n s u n l im i t e d r e c a l l cy c l e s f r o m e eprom s s i n g l e 5 v 1 0 % op e r a t i o n s op e r a t i n g t em p e r a t u r e r a ng e : 0 to 70 c - 4 0 t o 85 c s c e c c 9 0 0 0 0 q u a l i t y s t a n da r d s e s d p r o t e c t i o n > 2 0 0 0 v ( m il s t d 8 8 3c m 3 0 1 5 .7) s p a c k a g e : pdi p 28 ( 6 00 m il) desc r i p tion t h e u 6 3 7 2 5 6 h a s t w o s e p a r a te m o d e s o f o p e r a t i o n : s r a m mo d e a n d n o n v o l at i le m o d e . i n s r a m m o d e, t h e m e m o r y o p e r a t es as an o r d i n a r y s t a t i c r a m . i n n o nv o l a t i l e o p e r a t i o n , d a t a i s t r a n s f e rr e d i n p a r a ll e l fr o m sram to ee p ro m o r fr o m eepr o m to sr a m . in t h is m o d e s r a m f u n c t i o n s a r e d i s a b - l e d. t h e u 6 3 7 2 5 6 i s a s t a t i c r a m w i t h a n on v o l a t i l e e l e c t r i c a l l y e r as a b l e prom (ee p ro m ) e l e m e n t i n c or- p o r a t e d i n e a ch s t a t ic m e m o r y ce ll . t h e s r a m c a n be r e ad a n d w r it t e n a n u n l i m i t e d n um b e r o f t i m es , w h i l e i n d e p e n d e n t n o n v o l a ti l e d a ta r e s i- d e s i n eepr o m . d a ta tr a n s f e rs fr o m t h e sram t o t h e e e prom ( t h e s t o r e o p e r a t i o n) t a k e p l a c e a u t o m a t i c a l l y u p o n p o w e r d o w n u s i n g c h a r g e s t o r ed in an i n te g r a- t e d c a p a c it o r . t r a n s f e r s fr o m t he ee p ro m to t h e sr a m ( t h e r e c a l l o p e r a t i o n ) t a k e p l a ce a u t o m a t i c a l l y on p o w e r u p. t he u 6 37 2 5 6 c o mb i n es t h e e as e o f u se o f an s r a m w i th n o n v o l at i le d a ta i n t e gr i t y . s t o r e c yc l e s a l s o m a y b e i n i t i a t e d u n d er u s er c o n t r o l v i a a s o ft w a r e s e q u e n ce. o n c e a s t o r e c y c l e is i n it i at e d, f u r t h e r i n p u t o r o u t pu t a r e d i s a b l e d u n t i l t h e c y c l e i s co m p l e t e d . b e c au s e a s e q u e n c e o f a d d r e s s es i s u s e d f o r s t o r e i n i t i a t i o n , i t i s i mp o r t a n t t h a t n o o t h e r r e a d o r w r i t e a c c e ss e s i n t e r v e n e i n t h e s e q u e n ce o r t h e s e q u e n ce w i l l be a b o r te d . r e c a l l c y c l es m a y a l s o b e i n i t i a- t e d by a s of t ware s e q u e n c e. i n t e rn a l l y , rec a ll is a two s t ep p r o c e d u r e. f i r s t, t h e s r a m d a ta is c l e a r e d a nd s e co n d , t h e n o nv o l a t i l e i n f o r m a t i o n i s t r a n s f e r r e d i n t o t h e s r a m c e l l s. t h e r e c a l l o p e r a t i o n i n n o w a y a lt e rs the d ata in t h e e epr o m c e l l s . t h e n on v o l a t i l e da t a c a n b e r e c a l l e d a n u n l i m i t e d nu m b e r o f t i m e s . t h e u 6 3 7 2 5 6 is p i n c o m p a ti b le w i th s t a nd a r d s r a ms a n d s t a n da r d b a t- t e ry b a c k e d sra m s .
2 o c t o b e r 1 2 , 1 9 98 u637256 preliminary i nput b u f f e r s eep r o m a r r ay 51 2 x ( 6 4 x 8) s t o r e r e c a l l s r am a rr a y 512 r o w s x 6 4 x 8 c o l u m n s d q 0 d q 1 d q 2 d q 3 d q 4 d q 5 d q 6 d q 7 c o l u mn i / o c o l u mn d e c o d e r a0 - a13 st o r e / r e call c ont r ol r o w d e c oder v cc v ss g e w a0 a 1 a 2 a3 a 4 a 1 0 soft w are d e t e c t p o w e r c ont r ol v cc a5 a6 a7 a8 a9 a 1 1 a 1 2 a 1 3 a14 o p e rati n g m o de e w g dq 0 - dq7 s t a n d b y / n o t s e l e c t e d h ** h i g h -z i n t e r n a l r e a d l h h h i g h - z r e a d l h l d a t a o ut p u t s l o w - z wri t e l l * d a ta i n p u ts h i g h -z t ruth t a ble for s ra m o per a ti o ns bl o c k di a gr a m a: s t re s s e s gre a ter t han th o s e l i s t ed under ?ab s o l u te ma x i m u m r a t i ng s ma y c a u s e pe r m a nen t d a m a ge to t he de v i c e . t h i s i s a s tr e ss ra t i ng on l y , and f un c t i o n a l o pera t i on o f t he de v i c e a t c o nd i t i on abo v e th o s e i n d i c a t ed i n t h e o pera t i ona l s e c t i o ns o f t h i s s p e cific a t i o n is no t i m p lied . e x p o s ur e t o ab s olu t e ma x imum ra t i ng c o n di t i o n s f or e x t en d ed period s may a f f e c t relia b ili t y . a b s o lu t e m a x i m u m r a t in gs a s y m b ol m in. m a x. u nit p o w e r s u p p l y v o l t a g e v cc - 0 .5 7 v i n p u t v o l t a g e v i - 0 .3 v cc + 0 .5 v ou t p u t v o l t a g e v o - 0 .3 v cc + 0 .5 v p o w e r d i s s i p a t ion p d 1w op e r a t i n g t e m p e r a t u r e c - t y pe k- t y p e t a 0 - 4 0 70 85 c c s to r a g e t e m p e r a t u r e t s t g - 6 5 1 5 0 c ch a r a c t e ri s ti c s a ll v o l ta g es ar e re f ere n c e d t o v ss = 0 v ( g round ) . a ll c h ara c te r i s t i c s are v a li d i n th e p o w e r s upp l y v o l t a g e r ange and i n t h e o pera t i ng t e m p era t ure rang e s pe c i f i e d. d y nam i c m e a s u remen t s are ba s ed on a r i s e a nd fa ll t i me o f 5 n s , me a s u r e d bet w e e n 1 0 % a n d 9 0 % o f v i , a s w e l l a s i npu t l e v e l s o f v il = 0 v a n d v ih = 3 v . t h e t i m i ng re f e ren c e l e v e l o f a ll i np u t and ou t pu t s i g n a l s i s 1 .5 v, w i th t h e e x c ep t i o n o f t h e t dis -t i me s and t en - t i m e s , i n w h ich c a s e s t r a n s i t i o n is m e a s u r e d 2 0 0 mv f rom s t ead y - s ta t e v o l ta g e. * h o r l
3 o ct o b e r 1 2 , 1 9 98 u637256 preliminary b : i c c 1 a n d i c c 3 a r e d epede n t on ou t pu t l o ad i ng and c y c l e ra t e . t he s pe c i f i e d v a l u e s are ob t a i n e d wi t h o u t p ut s un l oa d ed. t he c u rren t i c c 1 i s mea s ured f o r w r i t e / r ea d - r a t i o o f 1/ 2 . c : i c c 2 i s th e a v era g e c u r r ent re q u i re d f o r t h e dur a t i o n o f th e softstore store cycle. d : b r i ng i n g e 3 v ih w i l l n o t prod u c e s ta n db y c u rr e nt l e v e l s u n t i l a s o f t w a re i n i t i a t ed n on v o l a t il e c y c l e i n p rogre s s h a s t i m e d o u t. s e e m o d e s e le c t i o n ta b l e. t he c u rren t i c c( s b)1 i s me a s u r e d f o r w r i t e / r e a d - ra t i o of 1 / 2. dc c h ar a ct e ri s tics s y m bol c o n d itio n s c - t y pe k- t y pe u n it m i n . m a x. m i n. m a x. o p e r a t i n g s u p p l y c u r r e n t b i c c 1 v cc v il v ih t c = 5 . 5 v = 0 . 8 v = 2 . 2 v = 7 0 ns 60 6 5 m a a v e r a g e s u p p l y c u r r e n t d u r i n g c st o re i c c 2 v cc e w v il v ih = 5 . 5 v 0 . 2 v 3 v cc -0 . 2 v 0 . 2 v 3 v cc - 0 . 2 v 6 7 m a o p e r a t i n g s u p p l y c u r r e n t b at t cr = 20 0 ns ( c y c l i n g c m o s i n pu t l e v e l s ) i c c 3 v cc w v il v ih = 5 . 5 v 3 v cc -0 . 2 v 0 . 2 v 3 v cc -0 . 2 v 15 1 5 m a s t a n d b y s u p p l y c u r r e n t d ( c y c l i n g t t l i n p u t l e ve l s) i c c (sb)1 v cc e t c = 5 . 5 v = v ih = 7 0 ns 20 2 2 m a s t a n d b y s u p p l y c u r e n t d (st a b le c m o s i n p u t l e v e l s ) i cc (sb) v cc e v il v ih = 5 . 5 v 3 v cc -0 . 2 v 0 . 2 v 3 v cc -0 . 2 v 3 3 m a r e c o m m e n d e d o p e ra t ing co n diti o ns sy m b o l co n dit i ons m i n. m a x. unit p o w er s u p p ly v o l t a g e v cc 4 . 5 5 .5 v i n p u t l o w v o lt a ge v il - 2 v a t p u l s e w i d t h 1 0 n s p e r m i t t e d - 0 .3 0 .8 v i n p u t h igh v o l ta g e v ih 2 . 2 v cc + 0 .3 v
4 o c t o b e r 1 2 , 1 9 98 u637256 preliminary s ram m e mo r y o p e r a t i ons e : parame t e r guar a n t e ed but no t te s t ed. f: d e v i c e i s c on t i nuo u s l y s e l e c t ed wi th e and g bo t h lo w . g : addr e s s v a li d p r i o r to or c o i n c i den t wi t h e t ran s i t i on lo w . h : m e a s u red 2 0 0 m v f rom s t ead y s t a t e o u tp u t v o l t a ge. d c ch a ra c ter i st i cs s y mb o l c o ndi t io n s c- t y pe k - t y pe un i t m in. m a x . m in. m a x . o u t p u t h i g h v o l t a g e o u t p ut l o w v o l t a g e v oh v ol v cc i oh i ol = 4 . 5 v = - 4 m a = 8 m a 2 . 4 0.4 2 . 4 0 . 4 v v o u t p u t h i g h c u rr e n t o u t p ut l o w c u r r e n t i oh i ol v cc v oh v ol = 4 . 5 v = 2 . 4 v = 0 . 4 v 8 -4 8 -4 m a ma i n p u t l e a ka g e c u r r e nt h i g h l o w i ih i il v cc v ih v il = 5 . 5 v = 5 . 5 v = 0 v - 1 1 -1 1 m a m a o u t p ut l e a k a g e c u r r e n t h igh a t t h r e e - s ta t e- o u t p ut l o w a t t h r e e - s ta t e- o u t p ut i o h z i o l z v cc v oh v ol = 5 . 5 v = 5 . 5 v = 0 v - 1 1 -1 1 m a m a n o . s w i t ch i ng ch a ra c teri s ti c s r e a d c y c le s y m b ol m in. m a x . unit a l t. i ec 1 r e a d c y c l e t i me f t a vav t cr 70 ns 2 a d dr e s s a c c e s s t i m e to d a ta v a l id g t a v q v t a (a) 70 ns 3 c h ip e n a b le a c c e ss ti m e t o d ata v a l id t e l q v t a (e) 70 ns 4 o u t p u t e n a ble a c c e s s t i m e to d a ta v a l i d t g l qv t a ( g ) 35 ns 5e h i g h to o u tp u t i n hi g h-z h t e h q z t di s (e) 25 ns 6g h i g h to o ut p u t in h i g h -z h t g h qz t d i s ( g ) 25 ns 7e l o w to o ut p ut in l o w -z t e l q x t en (e) 5 n s 8g l o w t o o u t p ut in l o w -z t g l qx t e n ( g ) 0 n s 9 o u t p u t h o ld t i m e a ft e r a d dr e s s c h a n g e t ax q x t v (a) 3 n s 1 0 c h ip e n a b l e to p o w e r a c t i v e e t e l i cch t pu 0 n s 1 1 c h i p d i s a b l e t o p o w e r s t a n d b y d, e t e h i ccl t pd 70 ns
5 o c t o b e r 1 2 , 1 9 9 8 u637256 preliminary r e a d cycle 1 : a i - co n trol l e d (d u ring re a d cycl e : e = g = v il , w = v ih ) f r e a d cycle 2 : g -, e -c o ntr o ll e d ( d uri n g r e a d c y c le: w = v ih ) g no. s w it c h i ng char a c t eri s ti c s write c y c le s y m b ol m i n . m a x . u n i t alt. # 1 alt. #2 i e c 1 2 w rite c y cle t i m e t av a v t av a v t cw 70 ns 1 3 w rite p ulse w i d t h t w l w h t w(w) 55 ns 1 4 w rite p ulse w i d t h s et u p t i m e t w l e h t s u ( w ) 55 ns 1 5 a d d r e ss s et u p t i m e t a v w l t a vel t s u( a ) 0 n s 1 6 a d dr e s s v a li d to e n d o f w ri t e t a v w h t a veh t s u( a -wh) 55 ns 1 7 c h i p e n a b l e s et u p t i me t e l w h t s u (e) 55 ns 1 8 ch i p en a b l e t o end o f w r i te t eleh t w(e) 55 ns 1 9 d at a s et u p t i m e t o e n d o f w r i t e t d v w h t d v e h t su(d) 30 ns 2 0 d at a h o l d t im e a f t e r e n d of w r i t e t w h d x t eh d x t h(d) 0 n s 2 1 a d d r e ss h o l d a f t e r e n d o f w r ite t wh a x t eh a x t h ( a ) 0 n s 2 2 w l o w t o ou t p u t in h i g h -z h , i t w l qz t d i s( w ) 25 n s 2 3 w hig h to o u tp u t i n l o w -z t whqx t en( w ) 5 n s t a ( a) p r e vi o u s d a t a v a l i d o u tp u t d a ta v a l i d t cr addr e ss v alid t v( a ) aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa ai dqi o u tp u t 1 2 9 ai e g t d i s( e ) t cr t a (e) t e n( e ) t e n( g ) t a (g) t d i s( g ) a d dr e ss v a l i d o u t p u t d ata v alid aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa i cc a ct i v e s t a nd b y t pd t pu 1 3 4 5 7 6 8 10 11 t a ( a) 2 high i mp e d a n ce dqi o u tp u t
6 o c t o b e r 1 2 , 1 9 9 8 u637256 preliminary aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa a aaa a aaa a aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa a a a a a aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa a a a a 15 aaaa a aaa a aaa a aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa a a a a a aaaa a aaa a aaa a aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa a aaa a aaa a aaaa l - t o h - l e v e l u n d e f i n e d h- to l - l e v e l i: i f w i s low a n d w h e n e g o e s l o w , t h e o u tp u t s r e m a in i n t h e h igh imp e d a n c e s t a t e . j: e o r w m u st be v ih d u r i n g addr e ss tr a n siti o n . write c y c l e # 1 : w -c o ntr o ll e d j t h( d ) ai e w dqi i n p u t dqi o u tp u t t cw t s u (e) t h( a ) t w ( w ) t su( d ) t dis ( w) t en( w ) a ddre s s v a lid i np u t d a ta v a l i d high i m p e d a n ce aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa t s u ( a - w h) 12 16 13 19 20 23 21 t s u( a ) t h ( d ) ai e w dqi i n p u t dqi o u tp u t t cw t w( e ) t h ( a) t su( d ) a ddre s s v a lid i n p u t d a ta v a l i d t su( w ) 12 18 21 2 0 19 17 22 pr e vi o u s d a ta aaaa aaaa aaaa aaaa aaa aaa aaa aaa 14 high i mp e d a n ce 15 t s u ( a ) write c y c l e # 2 : e -c o ntro l l ed j
7 o ct o b e r 1 2 , 1 9 98 u637256 preliminary n o nv o l a t ile m e m o r y o per a ti o n s m o de s elec t i o n k : t h e s i x c on s e c u t i v e ad d re s s e s mu s t b e i n o rder l i s te d . w mu s t be h i gh dur i n g a l l s i x c on s e c u t i v e c y c l e s . s e e s t o r e c y c l e and r e c a ll c y c l e t ab l e s and d i a g rams f o r fur t he r de t a il s . t h e f o ll o wi n g s i x -addr e s s s e q uen c e i s u s e d fo r t e s t i n g p u rpo s e s a n d s ho u l d n o t b e u s ed : 0 e 38 , 3 1 c 7 , 03e0 , 3 c 1 f , 3 0 3 f , 339 c . l : w h i l e the r e a r e 1 5 a ddre s s e s on t he u 6 3 7256 , on l y t he l o w e r 14 are u s ed to c on t ro l s o f t w a r e mo d e s . a c t i v a t i on of no n v o l a t i l e c y c l e s doe s not de p end on th e s t a te o f g . m : i / o s t a t e a s s u me s t ha t g v il . n: t r e s tore s t a r ts f r o m t h e t i m e v cc r i s e s a bo v e v s w i t c h . e w a 1 3 - a 0 (h e x) m o de i/o p o w er not e s h x x n o t s e l e c t ed o u t p u t h i g h z s t a n d by l h x re a d s ram o u t p u t d a ta a c ti v e m l l x write sr a m i n p u t d a ta a c ti v e l h 0 e 3 8 3 1 c 7 0 3 e 0 3 c 1 f 3 0 3f 0 f c 0 r e a d s ram r e a d s ram r e a d s ram r e a d s ram r e a d s ram n o n v o l at i le s t o r e o u t p u t d a ta o u t p u t d a ta o u t p u t d a ta o u t p u t d a ta o u t p u t d a ta o u t p u t h i g h z a c ti v e k , l k, l k, l k, l k, l k, l l h 0 e 3 8 3 1 c 7 0 3 e 0 3 c 1 f 3 0 3f 0 c 6 3 r e a d s ram r e a d s ram r e a d s ram r e a d s ram r e a d s ram n o n v o la t i l e r e c a ll o u t p u t d a ta o u t p u t d a ta o u t p u t d a ta o u t p u t d a ta o u t p u t d a ta o u t p u t h i g h z a c ti v e k , l k, l k, l k, l k, l k, l n o . powerstore p o w e r u p r e call s y m bol con d iti o ns m i n . m a x. u n it alt. iec 2 4 p o w e r up reca l l d u r a t i o n n t r e s to r e 6 5 0 m s 2 5 s t o r e c y c l e d u r a t i o n f, e t p d s t o r e 10 m s 26 t i m e a l l o w e d t o c o m p l e t e s r a m cyc l e f t d e l a y 1 m s l o w v o l t a g e t r i g g e r l e v el v s wi t c h 4 . 0 4 . 5 v
8 o c t o b e r 1 2 , 1 9 98 u637256 preliminary o : t he s o f t w a re s e quen c e i s c l o c k e d wi t h e c on t ro ll e d r e a d s . p : o n c e t he s o f t w a r e c o n tro l l ed s t o r e or r e c a ll c y c l e i s i n i t i a t ed , i t c o mp l e te s aut o m a t i c a l l y , i g n o r i ng a l l i np u t s . q : n o t e t ha t s t o r e c y c l e s ( but no t r e c a ll) are i nh i b i ted b y v cc < v s wi t ch ( s t o r e i n h i b i t ) . r : a n a u toma t i c r e c al l a l s o t a k e s p l a c e at po w er up , s t ar t i ng w h en v c c e x c e e d s v s w it c h and ta k e s t r e st o re . v cc m u s t n o t dro p b e l o w v s w it c h on c e i t ha s b e e n e x c ee d e d for t h e r e c a l l to f u n c t i o n pr o per l y . s : n o i s e o n th e e p i n ma y t r i gg e r mu l t i p l e r ea d c y c l e s f rom t h e s a me a ddre s s a n d a bor t t h e addr e s s s e q uen c e. t : i f t h e c h i p e nab l e pu l s e w i d t h i s l e s s t h an t a( e ) ( s e e r ea d c y c l e ) b u t gre a ter t han or equa l t w (e ) sr , th a n t h e da t a m a y no t b e v a li d at t he end o f t he l o w p u l s e , ho w e v er th e s t o r e or r e c a l l will s t ill b e i n i t i a t e d . no . so f tw a re co n trol l e d store/reca l l c y c le k , o s y m b ol m in . m a x . un i t alt. iec 2 7 st o r e/ r e c all i n i t i a ti o n ti m e t av a v t cr 70 ns 2 8 ch i p en a b l e to o ut p ut i n a c t i ve p t e l q z t d i s (e) sr 6 0 0 n s 2 9 store c y c le t i m e q t e l q xs t d (e)s 10 ms 3 0 reca l l c y c l e t i m e r t e l q xr t d (e)r 20 m s 3 1 a d d r e s s s e t u p t o c h i p e n a b le s t a ve l n t s u (a) sr 0 n s 3 2 c h i p e n a b l e p u l s e w i d t h s, t t e l e h n t w (e) sr 60 ns 3 3 c h i p d i s a b l e t o a d d r es s c h a n ge s t e h axn t h (a)sr 0 n s powerstore and automatic power up recall v cc 5 . 0 v t powerstore p o w e r u p v s w i t c h w dqi po w er up r e c a l l bro w n out t r e s to r e t r es t o r e bro w n out powerstore (no s ram wr i tes) reca l l 24 24 no store t p d s t o r e t d e l a y 25
9 o c t o b e r 1 2 , 1 9 9 8 u637256 preliminary aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aa aa aa aa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa t cr t s u ( a ) s r t w ( e) s r high i m ped a n c e a d dr e s s 1 v a l i d v a l i d s o f t w are c o ntro l l e d s t o re/rec a ll c y cle t, u , v (e = h igh a fter s t o r e i n iti a tio n ) a ddr e s s 6 t cr t d( e )s / t d ( e)r u: w m u s t b e h i g h w h e n e is l o w d u ri n g t h e addr e ss s e q u e n c e in o r d e r t o i n iti a t e a n o n v o l a t i l e c y c le. g m a y b e e i t h e r h i g h o r low t h r o u g hou t . a d d r e s s e s 1 t h ro u g h 6 a r e f o u n d in t h e m o d e s e l e c t i o n t a b l e . a ddr e s s 6 d e t e rmi n e s w h e t e r t h e u 6 3 7 2 5 6 p e r f o rms a s t o re o r r e c a ll. v: e m u s t b e u s e d t o c l o c k i n t h e a d d r e s s s e q u e n c e f o r t h e s o f t w a r e c o n t r o l l e d s t o r e a n d r e c a l l c y c l e s . t di s (e) s r 28 27 27 33 32 31 29 3 0 / t h ( a) s r aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aa aa aa aa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aa aa aa aa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaa aaa aaa aaa t cr t w ( e )sr h i gh i mp e d a n c e a ddr e s s 1 v a l i d v a l i d a d d r e s s 6 t d ( e)s / t d (e)r 31 3 2 / 29 t h ( a ) sr 35 34 t su ( a) s r 33 t di s (e) s r 30 t h ( a ) sr 35 t su( a ) s r 33 s o f t w are c o ntr o ll e d s t ore/r e c a ll c y cle t , u , v (e = l o w aft e r s t o re ini t iat i on) aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aa aa aa aa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa a a a a ai e dqi o u tp u t ai e dqi o u tp u t
1 0 o c t o b e r 1 2 , 1 9 98 u637256 preliminary a l l p i n s n o t unde r t e s t mu s t b e c o n ne c te d wi t h g roun d b y c ap a c i t o r s . c a p a c i t a n c e e c o nd i tio n s s y m bol m i n . m a x. unit in p ut c a p a c i ta n c e v cc v i f t a = 5 . 0 v = v ss = 1 m h z = 2 5 c c i 8 p f o ut p ut c a p a c i ta n c e c o 7 p f t e st con f ig u rati o n f o r f u n c tio n al ch e ck v ih v il v ss 480 255 30 pf w v o si m u l t ane ous m eas ur e - m ent o f al l 8 out put pi n s i n p u t le v e l a c c o rd in g t o t h e r e l e v ant t e s t m eas ur em ent dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 w : in mea s uremen t of t d i s -t i m e s and t en - t i m e s t h e c ap a c i t an c e i s 5 p f . x : be t w e e n v c c and v ss mu s t be c o n ne c te d a h i g h f requ e n c y b y pa s s c a pa c i t o r 0 . 1 m f t o a v o i d d i s t urban c e s . a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a 1 1 a12 e w g 5 v a13 a14 v cc x t h e d a t e o f m a n u f a c t u r e i s g i v e n b y t h e l a s t 4 d i g i t s o f t h e m a r k , t h e f i r s t 2 d i g i t s i n d i c a t i n g t h e y e a r , an d t h e l a s t 2 d i g i t s t h e c a l e n d a r w e e k. o r d er i ng inf o rm a tion t y pe n u m b er p a c k a g e o p e r a t i n g t e m p e r a t u r e r a n g e a c c e s s t i m e u 6 3 7 2 5 6 d 1 c 7 0 p d i p 2 8 ( 6 00 m i l ) 0 t o 7 0 c 70 n s u 6 3 7 2 5 6 d 1 k 7 0 p d i p 2 8 ( 6 00 m i l ) - 4 0 t o 8 5 c 70 n s
11 o ct o b e r 1 2 , 1 9 98 u637256 preliminary d e v i ce o p e r a t i on t h e u 6 3 7 2 5 6 h a s t w o s e p a r a t e m o d e s of o p e r a t i o n : s r a m m o d e a n d n o n v o l a t i l e m o d e . t h e me m o r y o p e- r a t e s in sram m o de as a s t a n d ard s ta t ic ra m . d a ta is t r a n s f e r r e d i n n o n v o l a t ile m o d e f r o m s r a m to e e pr o m (t h e s t o re o p er a t i o n ) or fr o m eepr o m to s r am ( t he reca l l o p e ra t io n ). in t h is m o de sram f u n c t i o n s a r e d i s a b l e d . s t o r e cy c l e s m a y b e i n i t i a t e d u n d e r us e r c o n t r o l v i a a s o f t w a r e s e q u e n c e a n d a r e a l s o a u t o m a t i c a l l y i n i t i a t e d w h e n t h e p o w e r s u p p l y v o l t a g e l e ve l o f t h e c h i p f a l l s b e l o w v s w i t c h . r e c a l l o p e r a t i o ns a r e a u t o ma t i c a l l y i n i t i a t e d u p o n p o w e r u p a n d m a y a l s o o c cu r w h e n t h e v cc r i s e s ab o v e v s w i t c h , a f t e r a l o w p o w e r c o nd i t i o n . r e c a l l c yc l e s m a y a l s o b e i n i t i a t e d b y a s o f t w a r e s e qu e n c e. s r a m read t h e u 6 3 7 2 5 6 p e r f o r m s a r e a d c y c l e w h e n ev e r e a n d g a r e lo w a n d w i s h i g h . t he a dd r e s s s p e c i f i e d o n p i n s a 0 - a 1 4 d e t e r m i n e s w h i c h o f t h e 3 2 7 6 8 d a t a b y t e s w i l l b e ac c e s se d . w h e n t h e r e a d i s i n i t i a t e d b y a n a d d r e s s t r a n s it i o n , t he o u t p u t s w ill b e v a l i d a ft e r a d e l a y o f t cr . i f t h e r e a d i s i n i t i a t e d b y e o r g , t h e o u t- p u t s w i l l b e v a l i d a t t a ( e ) or at t a ( g ) , w h i c h e v er i s l a te r . t h e d a ta o u t p uts w i ll r e p e a te d ly r e s p o n d to a d d r e ss c h an g e s w i t h i n t h e t cr a c c e ss t i m e w i t h o u t t h e ne e d f or t r a n s i t i o n o n a n y c o n t r o l i n p u t p i n s , a n d w i l l r e m a i n v a l i d u n t i l a n o t h e r a d d r es s c h a n ge o r u n t i l e o r g is b r o u g h t h i g h o r w is b r o u g h t l o w . s r a m wri t e a w r i t e c yc l e i s p e r f o r me d w h e n e v e r e a nd w a r e lo w . t h e a d d r e ss i n p u t s mu s t b e s t a b l e p r i o r t o e n t e r i n g t h e w r i t e cy c l e a n d m u s t r e m a i n s t a b l e u n t i l e i t he r e or w g oe s h i g h a t t h e e n d o f t h e cy c l e . t h e d a t a o n p i n s d q 0 - 7 w i l l b e w r i tt e n i n t o t h e me m o r y i f it i s v a l i d t s u ( d ) b e f o r e t h e e n d o f a w c o n t r o ll e d w rite o r t s u ( d ) b e f o r e t h e e n d o f an e c o n t r o l l ed w r ite. i t i s r e co m me n d e d t h a t g i s k e p t h i g h d u r i n g t h e e n t i r e w r i t e cy c l e t o a v o i d d a t a b u s co n t e n t i o n o n t h e c o m m on i/o li ne s . if g i s l e f t lo w , i n t e r n a l c i r cu i t r y w i ll t urn of f the o u t p u t b uff e r s t d i s ( w ) a ft e r w g o es l o w . au t om a t i c s t ore d u r i n g n o r ma l o p e r a t i on , t h e u 6 3 7 2 5 6 w i l l d r a w c u r r e n t f r o m v cc t o c h a r g e u p a n i n t eg r a t e d c a p a c i t o r . t h i s s t o r e d ch a r g e w i l l b e u s e d b y t h e c h i p t o p e r f o r m a s i n- g l e s t o r e o p e r a t i o n . i f t h e v o l t ag e o n t h e v cc p i n d r o p s b e l o w v s wi t c h , t he p a rt w i ll a u t o m a t i c a l l y di s c o n - n e c t t h e i n t e r n a l c om p o n e n t s f r om t h e e x t e r n a l p o w er s u pp l y w i t h a t y p ic a l d e l a y o f 1 5 0 n s a n d i n i t i a t e a s t o r e o p e r a t i o n w i t h t p d s t o r e ma x . 1 0 m s . in o r d e r to p r e v e n t u n n e e d ed s t o r e o p e r a ti o n s, a u t o - m a t i c s t o r e w i l l be i g n o r e d u n l e ss a t l e a s t o n e w r it e o p e r a t i o n h a s t a ke n p l a c e s i n c e t h e mo s t r e c e n t store o r rec a l l c y c l e . s o ft w a r e i n it i a t e d s t o r e c y c l e s a r e p e r f o r m e d r e g a r d l e s s o f w h e t h e r or n o t a w r i t e o p e r a t i o n h a s t ak e n p l a ce. s r a m r e a d a n d w r i t e o p e r a t i o n s t h a t a r e i n p r o- g r e ss a f t e r a n a u t o m a t i c s t o r e cy c l e o n p o w e r d o w n i s r eq u e s t ed a r e g i v e n t i m e t o c o mp l e t e b e f o r e t h e st o r e o p er a ti o n is i n i t ia t e d . d u r i n g t d e l a y m u l t i p le s r a m r e a d o p e r a ti o n s m a y t a k e p l a c e. i f a w r ite i s in p r o g r e s s i t w ill be a l l o w e d a t i m e , t d e l a y , t o c o mp l e t e . a n y s r a m w r i t e c y cl e s r e q u e s t e d a ft e r the v cc p i n d r op s b e l o w v s w i t c h w ill be i nh i b i t e d . au t om a t i c rec a ll d u r i n g p o w e r u p , a n a u t o m a t i c r e c a l l t ak e s p l a c e . a t a l o w p o w e r c o n d i t i o n ( po w e r s u p p l y vo l t a g e < v s wi t c h ) a n i n t e r n a l r e c a l l r e q u e s t m a y b e l a t c h e d . a s s o o n as p o w e r su p p l y v o l t a g e e x ce e d s t h e s en s e v o l ta g e o f v s wi t c h , a r e q u es t e d r e c a ll c yc l e w i l l a ut o m at i c a l l y be i n i ti a t e d a n d w ill t a k e t r es t o r e t o c om- p l e t e . if t h e u 6 3 7 2 5 6 i s in a w r i te s t a t e at t h e e n d o f p o w e r u p r e c a l l , t h e s r a m d a t a w i l l b e co r r u p t e d . t o h e l p a v o i d t h i s s i t u a t i o n , a 1 0 k w r e s i s t o r s h o u l d b e c o n n e c t e d b e t w e e n w a nd p o w e r s u p p l y v o l t a g e. so f t w ar e nonvol a ti l e store t h e u 6 3 7 2 5 6 s o f t w a r e c o nt r o l l ed s t o r e c y c l e is i n i t i a ted by e x e c u ti n g s e q u e n t i a l r ea d c y c l es f r om s ix s p e c i f i c a d d r e s s l o ca t i o n s . b y r e l y i n g o n r e a d c y cl e s o n l y , t h e u 6 3 7 2 5 6 i m p l e m e n ts n o n v o l a t ile o p e r a t i o n w h il e r e ma i n i n g c o m p a t i b l e w i t h s t a n d a r d 3 2 k x 8 s r a m s . d u r i ng t h e s t o r e c y c l e, an e r a s e of t h e p r e - v i o u s n o n vo l a t i l e d a t a i s p e r f o r m e d f i r s t , f o ll o w e d b y a p a r a l l e l p r o g r a mm i n g o f a l l t h e n o n v o l a t il e e l e m en t s . o n c e a s t o r e cy c l e i s i n i t i a t e d , f u r t h e r i n p u t s a n d o u t- p u t s a r e d i s a b l e d u n t i l t h e c y c l e i s co m p l e t e d . b e c au s e a s e q u e n c e o f a d d r e ss e s i s u s e d f o r s t o r e i n i t i a ti o n, it i s i m p o rt a nt t h at n o o t h e r r e a d o r w r ite a c c e ss e s i n t e r v e n e i n t h e s e q u en c e o r t h e se q u e n c e w i l l be a b o r te d . t o i n i t i a t e t h e s t o r e c yc l e t h e f o l l o w i n g r e ad s e q u e n ce m u s t b e p e r f o r m e d : 1 . r e a d a d d r e s s e s 0 e 3 8 ( h e x ) v a l i d r e a d 2 . r e a d a d d r e s s e s 3 1 c 7 ( h e x ) v a l i d r e a d 3 . r e a d a d d r e s s e s 0 3 e 0 ( h e x ) v a l i d r e a d 4 . r e a d a d d r e s s e s 3 c 1 f ( h e x ) v a l i d r e a d 5 . r e a d a d d r e s s e s 3 0 3f ( h e x ) v a l i d r e a d 6 . r e a d a d d r e s s e s 0 f c 0 ( h e x ) i n i t i a t e s t o r e cyc l e
12 o c t o b e r 1 2 , 1 9 98 u637256 preliminary o n c e t h e s i x t h a d d r e s s i n t h e se q u e n c e h a s b e en e n t e r e d , t h e s t o r e cy c l e w i l l c o mm e n c e a n d t h e ch i p w i l l b e d i s a b l e d . i t i s i m p o r t a n t t h a t r e a d c y cl e s a n d n o t w r i t e c yc l e s b e u s e d i n t h e s e q u e n c e , a l t h o u g h i t i s n o t n e c es s a r y t h a t g be l o w f o r t h e s e q u e n c e t o b e v a l i d. af t er t he t s t o r e cy c l e t i me h a s b e e n f u l f i l l e d , t he s r a m w i l l a g a i n b e a c t i v a t e d f o r r e a d a n d w r i t e o p e r a t i o n . w h en v cc < v s w i t c h a l l s o f t ware st o re o p e r a t i o n s w i l l b e i n h i b i t e d. a n y s ram wri t e c y c l e s re q u e s ted a f t e r the v cc p i n d r o p s b e l o w v s w it c h w i l l b e i n h i b i t ed. s o f t w are n o n v o l a tile reca l l a reca l l c y c le of t h e e e pr o m d a t a i n to t h e sr a m is i n i ti a t e d w i t h a s e q u e n c e of r e a d o p e r a t i o ns i n a m a n n e r s i m i l a r t o t h e s t o r e i n i t i a t i o n . t o i n i t i a t e t h e r e c a l l cy c l e t h e f o l l o w i n g s e qu e n c e o f r e a d o p e r a - ti o n s m u s t be p er f or m e d : 1 . r e a d a d d r e ss e s 0 e 3 8 ( h e x ) v a l i d r e a d 2 . r e a d a d d r e ss e s 3 1 c 7 ( h e x ) v a l i d r e a d 3 . r e a d a d d r e ss e s 0 3 e 0 ( h e x ) v a l i d r e a d 4 . r e a d a d d r e ss e s 3 c 1 f ( h e x ) v a l i d r e a d 5 . r e a d a d d r e ss e s 3 0 3 f ( h e x ) v a l i d r e a d 6 . r e a d a d d r e s s e s 0 c 6 3 ( h e x ) i n i t i a t e r e ca l l cy c l e i n ter n a l l y , reca l l i s a two s t ep pr o c e d ur e . f i r s t, t h e s r a m d a t a i s c l e a r e d a n d s e c o n d , t h e n o n v o l a t i le i n f o r m a t i on i s t r a n s f e rr e d i n t o t h e s r a m c e l l s . a f t e r t d (e)r c yc l e t i m e t h e s r a m w i l l o n ce a g a i n b e r e a d y f o r r e a d a n d w r i t e o p e r a t i o ns . t h e r e c a l l op e r a t i on i n n o w a y a l t e r s t h e d a t a i n t h e e e p r o m c e l l s . t he n o n v o l a t ile d a ta c a n be r e c a l l e d a n u n l i m i t e d n u m b e r of ti m e s. lo w a v erage ac t iv e pow e r w h en e i s h i g h t h e c h i p co n s u me s o n l y s t a nd b y c u r - r e n t. t h e o v e r a ll a v e r a g e c u r r e nt d r a w n b y t h e p a r t d e p e n d s o n t h e f o l l o w i n g i t e m s : 1 . c m o s o r t t l i n p u t l e v e l s 2 . t h e t i m e d u r i n g w h i ch t h e ch i p i s d i s a b l e d ( e h i gh) 3 . t h e cy c l e t i m e f o r a cc e ss e s ( e l o w) 4. t h e r a t i o o f r eads to wr i tes 5. t h e o p e r a ti n g te m p e r a tu r e 6. t h e v cc l e vel
l i f e s u p p o r t p o l i c y z m d p r o d u c t s a re no t designed, inten d ed , o r auth o r i z ed fo r us e as c omponent s in sy s t e ms intend f or su r gical i m plant into the bod y , o r other appl i cations intend e d to support or sustain l i f e, or f or any other appl i cation in w hi c h the f a i lure o f the z m d product cou l d create a s i tuation whe r e personal inju r y or death m ay oc c u r . co m ponents u s ed in l i f e -suppo r t dev i ces or sy s t e ms must be exp r ess l y autho r ized by z m d f or s u c h purpose. the in f o r m a t i on d e s c r ibes the type o f co m ponent an d s hall not be cons i dered as assu r ed characte r i s tic s . t er m s o f de l ive r y and r i ghts to change design r eser v e d . memory products 1 9 98 cap store 32k x 8 nvsram u63 7 256 ze n tr u m m ikr o e l e k t r o n i k d re s den g m b h gren z stra ? e 28 ? d - 0 1 109 d resden ? p. o. b. 80 01 34 ? d - 0 1 101 d re s d e n ? ger m a n y phone: +49 351 8 8 22 - 3 06 ? fa x : +49 3 5 1 88 22 - 3 3 7 ? e m ail: s a l es@ z md . de internet w eb s i t e: http:// w w w . z md. d e

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