®
IS42S81600A, IS42S16800A, IS42S32400A
IS42LS81600A, IS42LS16800A, IS42LS32400A
ISSI
COMMAND TRUTH TABLE
CKE
A11
Function Symbol
Device deselect
Nooperation
Burst stop
n – 1
H
n
×
L
H
×
×
×
×
×
×
×
CS
H
H
L
RAS
×
CAS
WE
BA1
×
BA0
×
A10
A9 - A0
×
×
×
×
H
×
H
H
H
H
H
H
L
H
H
L
×
L
H
H
L
L
H
L
L
L
L
×
×
H
×
×
×
L
×
V
V
V
V
V
×
Read
H
L
V
V
V
V
V
V
×
V
V
V
V
V
V
×
Readwithautoprecharge
Write
H
L
L
H
L
H
L
L
Write with auto precharge
Bank activate
H
L
L
H
V
L
H
L
H
H
H
L
Precharge select bank
Precharge all banks
Mode register set
Extended mode reg set
H
L
L
H
L
L
H
L
×
H
×
L
L
L
L
V
V
H
×
L
L
L
H
L
L
Note: H=VIH, L=VIL x= VIH or VIL, V = Valid Data.
DQM TRUTH TABLE
CKE
DQM
U
Function Symbol
n-1
H
n
×
×
×
×
×
×
L
L
Data write / output enable
L
Data mask / output disable
H
H
H
×
L
Upper byte write enable / output enable
Lower byte write enable / output enable
Upper byte write inhibit / output disable
Lower byte write inhibit / output disable
H
L
H
×
H
H
×
H
H
×
Note: H=VIH, L=VIL x= VIH or VIL, V = Valid Data.
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
ADVANCEDINFORMATION Rev. 00A
11
06/01/02
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
