IS61LV25616AL
AC WAVEFORMS
WRITE CYCLE NO. 3ꢀ(WE Controlled.ꢀ OE isꢀLOWꢀDuringꢀWriteꢀCycle)ꢀ(1)
t
WC
ADDRESS
OE
VALID ADDRESS
t
HA
LOW
LOW
CE
t
t
AW
t
PWE2
WE
t
SA
t
PBW
UB, LB
HZWE
t
LZWE
HIGH-Z
DATA UNDEFINED
DOUT
t
SD
t
HD
DATAIN VALID
DIN
UB_CEWR3.eps
WRITE CYCLE NO. 4ꢀ(LB, UB Controlled,ꢀBack-to-BackꢀWrite)ꢀ(1,3)
t
WC
t
WC
ADDRESS 1
ADDRESS 2
ADDRESS
OE
CE
t
SA
LOW
t
HA
SA
t
HA
t
WE
t
PBW
t
PBW
UB, LB
WORD 1
WORD 2
t
HZWE
t
LZWE
HIGH-Z
DOUT
DATA UNDEFINED
t
HD
t
HD
t
SD
t
SD
DATAIN
VALID
DATAIN
VALID
DIN
UB_CEWR4.eps
Notes:ꢀ
1.ꢀ TheꢀꢀinternalꢀWriteꢀtimeꢀisꢀdefinedꢀbyꢀtheꢀoverlapꢀofꢀCEꢀ=ꢀLow, UBꢀand/orꢀLBꢀ=ꢀLow,ꢀandꢀWEꢀ=ꢀLOW.ꢀAllꢀsignalsꢀmustꢀbeꢀinꢀ
validꢀstatesꢀtoꢀinitiateꢀaꢀWrite,ꢀbutꢀanyꢀcanꢀbeꢀdeassertedꢀtoꢀterminateꢀtheꢀWrite.ꢀTheꢀtsa,ꢀtHa, tsD,ꢀandꢀtHDꢀtimingꢀisꢀreferencedꢀ
toꢀtheꢀrisingꢀorꢀfallingꢀedgeꢀofꢀtheꢀsignalꢀthatꢀterminatesꢀtheꢀWrite.
2.ꢀ TestedꢀwithꢀOEꢀHIGHꢀforꢀaꢀminimumꢀofꢀ4ꢀnsꢀbeforeꢀWEꢀ=ꢀLOWꢀtoꢀplaceꢀtheꢀI/OꢀinꢀaꢀHIGH-Zꢀstate.
3.ꢀ WEꢀmayꢀbeꢀheldꢀLOWꢀacrossꢀmanyꢀaddressꢀcyclesꢀandꢀtheꢀLB,ꢀUBꢀpinsꢀcanꢀbeꢀusedꢀtoꢀcontrolꢀtheꢀWriteꢀfunction.
10ꢀ
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. F
12/15/2011
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
