MSM548263-70JS View Datasheet(PDF) - Oki Electric Industry

Part Name

Description

MFG CO.

MSM548263-70JS

262,144-Word x 8-Bit Multiport DRAM

Oki Electric Industry 

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¡ Semiconductor

MSM548263

CAS before RAS Refresh Cycle

tRP

RAS

tRC

tRAS

tRP

,
,
,
, CAS

Address

DSF

tRPC

tCSR tCHR

tASR tRAH

A

tFSR tRFH

B

tRPC

Inhibit Falling Transition

tWSR tRWH

WE

C

,
,
,
, tOFF

DQ1 - 8

TRG

Open

"H" or "L"

Note: The type of CBR operations are determined by the logic states of "A", "B" and "C".

CBR Cycle Function Table

Code

CBRR

CBRS

CBRN

RAS Falling Edge

A

BC

Function

X

0

1 CBR Refresh (Reset All Options)

STOP Address

1

0 CBR Refresh (Set STOP Address)

X

1

1 CBR Refresh (No Reset Options)

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