W641GG2JB Datasheet, PDF (43/109 Pages) Winbond – 1-Gbit GDDR3 Graphics SDRAM

W641GG2JB
1-Gbit GDDR3 Graphics SDRAM
6.6.2.2 Mode Register (MRS)
BA2 BA1 BA0 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
0
0
0
WL
DLL TM
CAS Latency
BT
Write Latency
A1 A10 A9
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
WL
A7
3*
0
4
1
5
6
7
DLL Reset
A8 DLL Reset
0
No*
1
Yes
Note: The DLL Reset bit is self-clearing
Test Mode
mode
Normal*
Test mode
CAS Latency
A6 A5 A4
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Latency
8*
9
10
11
12
13
14
7
BL
Burst Length
A2 A1 A0
0
1
0
0
1
1
All others
BL
4*
8
RFU
Burst Type
A3
BT
0 Sequential*
1
RFU
* Default value at power-up
6.6.2.3 Mode Register Set Timing
CLK#
CLK
Command
PA
NOP
tRP
MRS
NOP
NOP
A.C.
NOP
RD
tMRD
tMRDR
MRS : MRS command
PA : PREALL command
A.C. : Any other command as READ
RD : READ command
Don't Care
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Publication Release Date: Apr, 22, 2011
Revision A01-002