W641GG2JB Datasheet, PDF (24/109 Pages) Winbond – 1-Gbit GDDR3 Graphics SDRAM

W641GG2JB
6.3.2 Command Overview for 2-CS mode
1-Gbit GDDR3 Graphics SDRAM
Operation
Code
Ranks
Device Deselect
DESEL
L XX
H H H HX X L X X X X
X
1
HHH
Data Terminator Disable
DTERDIS
H HHHHLH X X X X
X
1,2
No Operation
NOP
H
H
L
X
X
L
HHH X X X
X
X
Mode Register Set
MRS
H H L X L L L 0 0 0 OPCODE
Extended Mode Register Set EMRS
H HLXLLL 1 0
OPCODE
Extended Mode Register Set 2 EMRS2
H H L X L L L 0 1 0 OPCODE
Bank Activate
ACT
MemBlock 1 H H L H L H H BA BA BA Row Address ^1,3
MemBlock 2 H H H L L H H BA BA BA Row Address
Read
RD
MemBlock 1 H H L H H L H BA BA BA L Col. ^1,4
MemBlock 2 H H H L H L H BA BA BA L Col.
Read w/ Autoprecharge
RD/A
MemBlock 1 H H L H H L H BA BA BA H Col. ^1,4
MemBlock 2 H H H L H L H BA BA BA H Col.
Write
WR
MemBlock 1 H H L H H L L BA BA BA L Col. ^1,4
MemBlock 2 H H H L H L L BA BA BA L Col.
Write w/ Autoprecharge
WR/A
MemBlock 1 H H L H H L L BA BA BA H Col. ^1,4
MemBlock 2 H H H L H L L BA BA BA H Col.
Precharge
PRE
MemBlock 1 H H L H L H L BA BA BA L
X
1
MemBlock 2 H H H L L H L BA BA BA L
X
Both
H H L L L H L BA BA BA L
X
Precharge All
PREALL MemBlock 1 H H L H L H L X X X H
X
1
MemBlock 2 H H H L L H L X X X H
X
Both
H HL LLHL XX X H
X
Auto Refresh
AREF
MemBlock 1 H H L H L L H X X X X
X
1,5
MemBlock 2 H H H L L L H X X X X
X
Both
H HLLLLHXXX X
X
Power Down Mode Entry
PWDNEN
HHXXX
H
LX
L
L
X
H
H
H
XXX
X
X
1,6
Power Down Mode Exit
PWDNEX
L HXXXXX XX X X
X
1,7
Self Refresh Entry
SREFEN
H L LLLLHXXX X
X
1,8
Self Refresh Exit
SREFEX
L HXXXXX XX X X
X
1,9
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Publication Release Date: Apr, 22, 2011
Revision A01-002