IS42S81600D, IS42S16800D
COMMAND TRUTH TABLE
CKE
A11
Function
n – 1
H
n
×
×
×
×
×
×
×
×
×
×
H
L
×
CS
H
L
RAS
×
CAS
×
WE
×
BA1
×
BA0
×
A10 A9 - A0
Device deselect (DESL)
Nooperation (NOP)
Burst stop (BST)
Read
×
×
×
L
×
×
×
V
V
V
V
V
×
×
×
×
V
H
H
H
H
H
H
H
L
H
H
L
H
L
×
×
H
L
×
×
H
L
H
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 (ACT)
H
L
L
L
H
V
L
H
L
H
H
H
L
H
L
Precharge select bank (PRE) H
L
L
Precharge all banks (PALL)
CBRAuto-Refresh(REF)
Self-Refresh(SELF)
H
H
H
H
L
L
L
H
×
×
L
L
L
H
H
L
×
×
L
L
L
×
×
Mode register set (MRS)
L
L
L
L
L
Note: H=VIH, L=VIL x= VIH or VIL, V = Valid Data.
DQM TRUTH TABLE
CKE
DQM
Function
n-1
H
n
×
×
×
×
×
×
U
L
L
L
Data write / output enable
Data mask / output disable
H
H
L
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
Note: H=VIH, L=VIL x= VIH or VIL, V = Valid Data.
H
H
×
H
H
×
H
H
×
8
Integrated Silicon Solution, Inc. — www.issi.com
Rev. E
07/28/08
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
