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IS49FL004T-33VCE Datasheet(PDF) 4 Page - Integrated Silicon Solution, Inc |
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IS49FL004T-33VCE Datasheet(HTML) 4 Page - Integrated Silicon Solution, Inc |
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4 / 45 page  IS49FL004T Integrated Silicon Solution, Inc.- www.issi.com 4 Rev. A1 9/19/2013 PIN DESCRIPTIONS S Y M B O L T Y P E In te rfa c e D E S C R IP T IO N P P F W H L P C A [1 0 :0 ] I X A dd re s s Inp uts : F o r i np uti ng the m ultip le x a d d re s s e s a nd c o m m a nd s in P P m o d e . R o w a nd c o lum n a d d re s s e s a re la tc he d d uri ng a re a d o r w ri te c yc le c o ntro lle d b y R /C # p in. R /C # I X R o w /C o lum n S e le c t: To i nd i c a te the ro w o r c o lum n a d d re s s in P P m od e . W he n thi s p in go e s lo w, the ro w a d d re s s is la tc he d . W he n thi s p in go e s hi g h, the c o lum n ad d re s s i s la tc hed . I/O [7 :0 ] I/O X D a ta Inp uts /O utp uts : U s e d fo r A /A M ux m o d e o nly, to inp ut c o m m a nd /d a ta d uri ng w ri te o p e ra tio n a nd to o utp ut d a ta d uri ng re a d o p e ra ti o n. The da ta p i ns flo a t to tri-s ta te w he n O E # is d i s a b le d . W E # I X W ri te E na b le : A c tiva te the d e vi c e fo r w rite op e ra tio n. W E # i s a c ti ve lo w. O E # I X O utp ut E na b le : C o ntro l the d e vi c e 's o utp ut b uffe rs d uring a re a d c yc le . O E # i s a c tive lo w. IC I X X X Inte rfa c e C o nfig ura tio n S e le c t: Thi s p in d e te rm i ne s w hi c h m o d e i s s e le c te d . W he n p ulls hig h, the d e vic e e nte rs into A /A M ux m o d e . W he n p ulls lo w, F W H /L P C m od e is s e le c te d . This p in m us t b e s e tup d uring p o w e r-up o r s ys te m re s e t, a nd s ta ys no c ha ng e d uring op e ra tio n. This p in is inte rna lly p ulle d d o w n w i th a re s i s to r b e tw e e n 2 0 -1 0 0 K R S T# I X X X R e s e t: To re s e t the o p e ra ti o n o f the d e vi c e a nd re turn to s ta nd b y m o d e . IN IT# I X X Ini ti a lize : This is a s e c o nd re s e t p in fo r in-s ys te m us e . IN IT # o r R S T# p in p ulls lo w w i ll ini tia te a d e vic e re s e t. G P I[4 :0 ] I X X F W H /L P C G e ne ra l P urp o s e Inp uts : U s e d to s e t the G P I_ R E G fo r s ys te m d e s i g n p urp o s e o nly. T he va lue o f G P I_ R E G c a n b e re a d thro ug h F W H inte rfa c e . The s e p ins s ho uld b e s e t a t d e s ire d s ta te b e fo re the s ta rt o f the P C I c lo c k c yc le fo r re a d o p e ra tio n a nd s ho uld re m a in no c ha ng e until the e nd o f the re a d c yc le . U nus e d G P I p ins m us t no t b e flo a te d . TB L # I X X To p B lo c k L o c k : W he n p ulls lo w, it e na b le s the ha rd w a re w ri te p ro te c tio n fo r to p bo o t b lo c k . W he n p ulls hig h, it d is a b le s the ha rd w a re w rite p ro te c tio n. W P # I X X W ri te P ro te c t: W he n p ulls lo w, it e na b le s the ha rd w a re w ri te p ro te c tio n to the m e m o ry a rra y e xc e p t the to p b o o t b lo c k . W he n p ulls hi g h, it d is a b le s ha rd w a re w rite p ro te c ti o n. F W H [3 :0 ] I/O X F W H A d d re s s a nd D a ta : The m a jo r I/O p ins fo r tra ns m itting d a ta , a d d re s s e s a nd c o m m a nd c o d e in F W H m o d e . F W H 4 I X F W H Inp ut: To i nd ic a te the s ta rt o f a F W H m e m o ry c yc le op e ra tio n. A ls o us e d to a b o rt a F H W m e m o ry c yc le in p ro g re s s . L A D [3 :0 ] I/O X L P C A dd re s s a nd D a ta : The m a jo r I/O p ins fo r tra ns m itting d a ta , a d d re s s e s a nd c o m m a nd c o d e in L P C m o d e . L F R A M E # I X L P C F ra m e : To ind ic a te the s ta rt o f a L P C m e m o ry c yc le o p e ra ti o n. A ls o us e d to a b o rt a L P C m e m o ry c yc le in p ro g re s s . C L K I X X F W H /L P C C lo c k : To p ro vid e a s ync hro no us c lo c k fo r F W H a nd L P C m od e o pe ra ti o ns . ID [3 :0 ] I X Id e ntifi c a tio n Inp uts : The s e fo ur p ins a re p a rt o f the m e c ha ni s m tha t a llo w s m ultip le F W H d e vic e s to b e a tta c he d to the s a m e b us . The s tra p p ing o f the s e p ins is us e d to id e ntify the c o m p o ne nt. The b o o t d e vic e m us t ha ve ID [3 :0 ] = 0 0 0 0 b a nd it is re c o m m e nd e d tha t a ll s ub s e q ue nt d e vi c e s s ho uld us e s e q ue nti a l up -c o unt s tra p p ing . The s e p ins a re inte rna lly p ulle d -d o w n w ith a re s is to r b e tw e e n 20 -10 0 K V C C X X X D e vic e P o w e r S up p ly G N D X X X G ro und N C X X X N o C o nne c ti o n R E S X X R e s e rve d : R e s e rve d func tio n p i ns fo r future us e . Note: I = Input, O = Output |
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