W631GG6KB-15 Datasheet, PDF (93/158 Pages) Winbond – Double Data Rate architecture: two data transfers per clock cycle

W631GG6KB
8. OPERATION MODE
8.1 Command Truth Table
Notes 1, 2, 3 and 4 apply to the entire Command Truth Table.
Note 5 Applies to all Read/Write commands.
[BA=Bank Address, RA=Row Address, CA=Column Address, BC#=Burst Chop, X=Don't Care, V=Valid]
Table 14 – Command Truth Table
COMMAND
Abbr.
Mode Register Set
Refresh
Self Refresh Entry
MRS
REF
SRE
Self Refresh Exit
SRX
Single Bank Precharge
Precharge all Banks
Bank Activate
Write (Fixed BL8 or BC4)
Write (BC4, on the Fly)
Write (BL8, on the Fly)
Write with Auto Precharge
(Fixed BL8 or BC4)
Write with Auto Precharge
(BC4, on the Fly)
Write with Auto Precharge
(BL8, on the Fly)
Read (Fixed BL8 or BC4)
Read (BC4, on the Fly)
Read (BL8, on the Fly)
Read with Auto Precharge
(Fixed BL8 or BC4)
Read with Auto Precharge
(BC4, on the Fly)
Read with Auto Precharge
(BL8, on the Fly)
No Operation
Device Deselected
PRE
PREA
ACT
WR
WRS4
WRS8
WRA
WRAS4
WRAS8
RD
RDS4
RDS8
RDA
RDAS4
RDAS8
NOP
DES
Power Down Entry
PDE
Power Down Exit
ZQ Calibration Long
ZQ Calibration Short
PDX
ZQCL
ZQCS
CKE
Previous
Cycle
H
H
H
Current
Cycle
H
H
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
CS# RAS# CAS# WE#
L
L
L
L
L
L
L
H
L
L
L
H
H
X
X
X
L
H
H
H
L
L
H
L
L
L
H
L
L
L
H
H
L
H
L
L
L
H
L
L
L
H
L
L
H
H
L
H
L
L
H
H
L
H
L
L
H
H
L
H
L
L
H
H
L
H
L
H
H
H
L
H
L
H
H
H
L
H
L
H
H
H
L
H
L
H
H
H
L
H
L
H
H
H
L
H
L
H
H
H
L
H
H
H
H
H
H
X
X
X
L
H
H
H
H
L
H
X
X
X
L
H
H
H
L
H
H
X
X
X
H
H
L
H
H
L
H
H
L
H
H
L
BA0-
BA2
BA
V
V
X
V
BA
V
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
V
X
V
X
V
X
X
X
A12/
BC#
A10/
AP
A0-
A9,
A11
OP Code
V
V
V
V
V
V
X
X
X
V
V
V
V
L
V
V
H
V
Row Address (RA)
V
L
CA
L
L
CA
H
L
CA
V
H CA
L
H CA
H
H CA
V
L
CA
L
L
CA
H
L
CA
V
H CA
L
H CA
H
H CA
V
V
V
X
X
X
V
V
V
X
X
X
V
V
V
X
X
X
X
H
X
X
L
X
NOTES
7, 9, 12
7, 8, 9,
12
10
11
6, 12
6, 12
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Publication Release Date: Feb. 27, 2013
Revision A04