msm5416273 Oki Semiconductor, msm5416273 Datasheet - Page 30

• Manufacturer Part Number: msm5416273
• Description: 262,144-word 16-bit Multiport Dram
• Manufacturer: Oki Semiconductor

¡ Semiconductor
OPERATION MODES
Table-1 shows the function truth table for a listing of all available RAM ports, and transfer
operations of the MSM5416273.
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.
Notes:
MSWT
Code
CBRR
CBRS
CBRN
MWT
RWM
BWM
FWM
LMR
ROR
SRT
LCR
RW
BW
RT
CAS TRG WE DSF DSF
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1. With CBRS and SAM operations use stop register.
2. After LMR, RWM, BWM, FWM and MSWT, use the old mask which can be reset by
RASØ
*
*
*
1
0
0
0
0
1
1
1
1
1
1
1
CBRR.
1
0
1
*
0
0
1
1
0
0
0
1
1
1
1
0
1
1
0
0
1
0
1
0
0
1
0
0
1
1
CASØ
—
—
—
— Row
*
*
*
*
0
1
*
0
1
0
1
RASØ
STOP
Row TAP WM1
Row TAP WM1
Row TAP
Row TAP
Row
Row
Row
Row
Row
Row
Row
Address
Table-1. Function Truth Table
*
*
A3c - 8c
A3c - 8c
CASØ
Column
Column
Column
Column
—
*
*
*
*
*
*
RASØ
WM1
WM1
WM1 —
*
*
*
*
*
*
*
*
*
*
W/IO
Din, Dout
Din, Dout
Column
Column
/WEØ
Select
Select
Mask
Color
CAS
Data
Data
—
*
*
*
*
*
*
*
Mask W.M.
Write Pers.
Yes
Yes
Yes
Yes
Yes
—
—
—
—
No
No
—
—
—
—
Reset Reset
No/ Load
Yes
No/
Yes
No/
Yes
No/
Yes
No/
Yes
Set Load —
No
No
—
—
—
—
—
—
Load
Load
Load
Load
WM
Register
Use
Use
Use
Use
Use
—
—
—
—
—
—
—
— Load
Color
Use
Use
Use
—
—
—
—
—
—
—
—
—
—
CBR Refresh
(Register Reset)
CBR Refresh
(Stop Register Set)
CBR Refresh (No Reset)
RAS Only Refresh
Masked Write Transfer
Masked Split
Write Transfer
Read Transfer
Split Read Transfer
Read/Write
(New/Old Mask)
Masked Block Write
(New/Old)
Masked Flash Write
(New/Old)
Read/Write
(No Mask)
Block Write
(No Mask)
Load Mask Register
(Old Mask Set)
Load Color Register
FEDS5416273-05
Function
MSM5416273
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