IS42S81600A, IS42S16800A, IS42S32400A
ISSI
WE
×
H
L
H
H
L
L
H
L
L
L
BA1
×
×
×
V
V
V
V
V
V
×
L
BA0
×
×
×
V
V
V
V
V
V
×
L
A10
×
×
×
L
H
L
H
V
L
H
L
×
×
V
V
V
V
V
×
×
V
®
COMMAND TRUTH TABLE
Function Symbol
Device deselect
No operation
Burst stop
Read
CKE
n–1
H
H
H
H
n
×
×
H
×
×
×
×
×
×
×
×
CS
H
L
L
L
L
L
L
L
L
L
L
RAS
×
H
H
H
H
H
H
L
L
L
L
CAS
×
H
H
L
L
L
L
H
H
H
L
A11
A9 - A0
Read with auto precharge H
Write
H
Write with auto precharge H
Bank activate
Precharge select bank
Precharge all banks
Mode register set
H
H
H
H
Note: H=V
IH
, L=V
IL
x= V
IH
or V
IL
, V = Valid Data.
DQM TRUTH TABLE
Function Symbol
Data write / output enable
Data mask / output disable
Upper byte write enable / output enable
Lower byte write enable / output enable
Upper byte write inhibit / output disable
Lower byte write inhibit / output disable
CKE
n-1
H
H
H
H
H
H
n
×
×
×
×
×
×
DQM
U
L
H
L
×
H
×
L
L
H
×
L
×
H
Note: H=V
IH
, L=V
IL
x= V
IH
or V
IL
, V = Valid Data.
8
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
PRELIMINARY INFORMATION Rev. 00C
01/20/05
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
