msm548262 Oki Semiconductor, msm548262 Datasheet - Page 24

• Manufacturer Part Number: msm548262
• Description: 262,144-word 8-bit Multiport Dram
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Masked Write Transfer
Note 1: SE = "L"
Note 2: There must be no rising transitions
Note 3: QSF = "L"-- Lower SAM (0 - 255) is active
SDQ1 - 8
Address
DQ1 - 8
RAS
TRG
CAS
DSF
QSF
WE
SC
  








 



QSF = "H"-- Upper SAM (256 - 511) is active
t
SRS
Dout
t
t
TLS
t
t
t
ASR
FSR
MS
WSR
Mask Data
t
SOH
Row
t
t
t
t
RFH
RWH
t
TLH
SC
t
RAH
MH
t
RAD
t
t
t
SDZ
t
Dout
RCD
RQD
AR
Note 3
t
 







 
ASC
SAM Start
t
Note 2
CSH
t
RAS
t
t
RSD
SDD
t
CAH
t
CAS
t
Open
RSH
t
CSD
t
t
t
RC
RAL
CQD
t
SCP
t
SDS
 
Data In
t
SDH
t
SC
t
RP
t
SCC
Note 3
t
SDS
MSM548262
Data In
"H" or "L"
t
SDH
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