W641GG2JB Datasheet, PDF (65/109 Pages) Winbond – 1-Gbit GDDR3 Graphics SDRAM

W641GG2JB
6.15.5 Write followed by Read on different ranks in 2-CS mode
1-Gbit GDDR3 Graphics SDRAM
0
CLK#
CLK
Com.
DES
Addr.
WDQS
RDQS
DQ
Com.
DES
Addr. B/C
WDQS
RDQS
DQ
1
2
3
WR_0
RD_1
N/D
tWTR_RR=1
B/C
B/C
WL = 3
WR
RD
N/D
tWTR_RR=1
B/C
WL = 4
4
5
6
7
11
12
13
14
15
DES
DES
CL = 9
DES
DES
DES
DES
DES
DES
DES
D0 D1 D2 D3
D0 D1 D2 D3
DES
DES
DES
DES
DES
DES
DES
DES
DES
CL = 9
D0 D1 D2 D3
D# : Data to B / C
Com. : Command
Addr. : Address B / C
WL : Write Latency
Don‘t care
D0 D1 D2 D3
B / C: Bank / Column address
WR_0 : WRITE on Rank 0
RD_1 : READ on Rank 1
DES : Deselect
N/D : NOP or DES
Notes :
1. t_{WTR_RR} is defined between write and read command on different rank.
2. Shown with nominal value of t_DQSS.
3. The RD command may be either for the same bank or another bank.
4. WDQS can only transition when data is applied at the chip input and during pre- and postamble.
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Publication Release Date: Apr, 22, 2011
Revision A01-002