SMJ44C251B Datasheet, PDF (42/53 Pages) Texas Instruments – 262144 BY 4-BIT MULTIPORT VIDEO RAM

SMJ44C251B
262144 BY 4-BIT
MULTIPORT VIDEO RAM
SGMS058A – MARCH 1995 – REVISED JUNE 1995
PARAMETER MEASUREMENT INFORMATION
RAS
td(CHRL)
tw(RL)
td(RLCL)
tc( _{TW )}
td(RLCH)
td(CARH)
tw(RH)
CAS
A0 – A8
th(RA)
tsu(RA)
DSF
tsu(SRF)
tsu(CA)
td(RLCA)
Row
th(RLCA)
Tap Point
A0 – A8
th(SFR)
tw(CL)
th(CLCA)
tw(CH)
Don’t Care
Don’t Care
tsu( _TRG)
th( _TRG)
TRG
tsu( _WMR)
W
th(RWM)
Don’t Care
td(RHSC)
DQ0 – DQ3
td(SCRL)
SC
tw(SCH)
SDQ0 – SDQ3
tsu(SDS)
th(SDS)
Data In
Hi-Z
tw(SCH)
Don’t Care
tw(SCL)
tsu(SDS)
Data In
th(SDS)
td(SCSE)
SE
Don’t Care
td(SESC)
QSF
td(CLQSF)
td(GHQSF)
td(RLQSF)
Tap Point
Bit A7
Figure 30. Alternate Data-Register-to-Memory Transfer-Cycle Timing
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