MSM548263-80JS View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
MFG CO.
'MSM548263-80JS' PDF : 40 Pages View PDF
¡ Semiconductor
MSM548263
OPERATION MODES
Table-1 shows the function truth table for a listing of all available RAM ports and transter
operation of MSM548263.
The RAM port and data transfer operations are determined by the state of CAS, TRG, WE and
DSF at the falling edge of RAS, and by the level of DSF at the falling edge of CAS.
Table-1. Function Truth Table
RASØ
CASØ Address W/IO
Register
Write Pers.
Code
CAS
CAS TRG WE DSF DSF RASØ CASØ RASØ
Mask W.M. WM Color
/WEØ
Function
CBR Refresh
CBRR 0 * 1 0 — * * * * — Reset Reset —
(Register Reset)
CBR Refresh
CBRS 0 * 0 1 — STOP * * * — — — —
(Stop Register Set)
CBRN 0 * 1 1 — * * * * — — — — CBR Refresh (No Reset)
ROR 1 1 * 0 — Row — * — — — — — RAS Only Refresh
No/ Load
MWT 1 0 0 0 * Row TAP WM1 * Yes
— Masked Write Transfer
Yes Use
No/ Load
Masked Split
MSWT 1 0 0 1 * Row TAP WM1 * Yes
—
Yes Use
Write Transfer
RT 1 0 1 0 * Row TAP * * — — — — Read Transfer
SRT 1 0 1 1 * Row TAP * * — — — — Split Read Transfer
No/ Load
Read/Write
RWM 1 1 0 0 0 Row Column WM1 Din,Dout Yes
—
Yes Use
(New/Old Mask)
Column
Column
No/ Load
Masked Block Write
BWM 1 1 0 0 1 Row
WM1
Yes
Use
A2c - 8c
Select
Yes Use
(New/Old)
No/ Load
Masked Flash Write
FWM 1 1 0 1 * Row * WM1 — Yes
Use
Yes Use
(New/Old)
Read/Write
RW 1 1 1 0 0 Row Column * Din,Dout No No — —
(No Mask)
Column
Column
Block Write
BW 1 1 1 0 1 Row
*
No No — Use
A2c - 8c
Select
(No Mask)
LMR 1 1 1 1 0 Row *
Mask
Load Mask Register
*
— Set Load —
Data
(Old Mask Set)
LCR 1 1 1 1 1 Row *
Color
*
— — — Load Load Color Register
Data
Notes: 1. With CBRS and SAM operations use stop register
2. After LMR, RWM, BWM, FWM and MSWT, use old mask which can be reset by
CBRR.
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