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W631GG6KB
9. OPERATION MODE
9.1
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
Mode Register Set
Abbr.
MRS
CKE
Previous
Cycle
H
Current
Cycle
H
CS#
L
RAS# CAS#
L
L
WE#
L
BA0-
BA2
BA
A12/
BC#
A10/
AP
OP Code
A0-
A9,
A11
NOTES
Refresh
REF
H
H
L
L
L
H
V
V
V
V
Self Refresh Entry
Self Refresh Exit
Single Bank Precharge
Precharge all Banks
SRE
SRX
PRE
PREA
H
L
H
H
L
H
H
H
L
H
L
L
L
L
X
H
L
L
L
X
H
H
H
H
X
H
L
L
V
X
V
BA
V
V
X
V
V
V
V
X
V
L
H
V
X
V
V
V
7, 9, 12
7, 8, 9,
12
Bank Activate
ACT
H
H
L
L
H
H
BA
Row Address (RA)
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)
WR
WRS4
WRS8
WRA
WRAS4
WRAS8
RD
RDS4
RDS8
RDA
RDAS4
RDAS8
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
V
L
H
V
L
H
V
L
H
V
L
H
L
L
L
H
H
H
L
L
L
H
H
H
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
No Operation
Device Deselected
Power Down Entry
Power Down Exit
ZQ Calibration Long
ZQ Calibration Short
NOP
DES
PDE
PDX
ZQCL
ZQCS
H
H
H
L
H
H
H
H
L
H
H
H
L
H
L
H
L
H
L
L
H
X
H
X
H
X
H
H
H
X
H
X
H
X
H
H
H
X
H
X
H
X
L
L
V
X
V
X
V
X
X
X
V
X
V
X
V
X
X
X
V
X
V
X
V
X
H
L
V
X
V
X
V
X
X
X
10
11
6, 12
6, 12
Publication Release Date: Dec. 09, 2013
Revision A05
- 94 -
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