is42s16800d Integrated Silicon Solution, Inc., is42s16800d Datasheet - Page 8

• Manufacturer Part Number: is42s16800d
• Description: 16meg X 8, 8meg X16 128-mbit Synchronous Dram
• Manufacturer: Integrated Silicon Solution, Inc.

DQM TRUTH TABLE
IS42S81600D,
COMMAND TRUTH TABLE
Note: H=V
Note: H=V
8
Function
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
Function
Device deselect (DESL)
No operation (NOP)
Burst stop (BST)
Read
Read with auto precharge
Write
Write with auto precharge
Bank activate (ACT)
Precharge select bank (PRE) H
Precharge all banks (PALL)
CBR Auto-Refresh (REF)
Self-Refresh (SELF)
Mode register set (MRS)
IH
IH
, L=V
, L=V
IL
IL
x= V
x= V
IH
IH
or V
or V
IS42S16800D
IL
IL
, V = Valid Data.
, V = Valid Data.
n – 1
CKE
H
H
H
H
H
H
H
H
H
H
H
H
H
n
×
×
×
×
×
×
×
×
×
×
L
×
CS
CS
CS
CS
CS
H
L
L
L
L
L
L
L
L
L
L
L
L
CKE
n-1
H
H
H
H
H
H
RAS
RAS
RAS
RAS
RAS
H
H
H
H
H
H
×
L
L
L
L
L
L
n
×
×
×
×
×
×
CAS
CAS
CAS
CAS
CAS
H
H
H
H
H
×
L
L
L
L
L
L
L
Integrated Silicon Solution, Inc. — www.issi.com
WE
WE
WE
WE
WE
H
H
H
H
H
H
×
L
L
L
L
L
L
DQM
U
L
H
L
×
H
×
BA1
×
×
×
V
V
V
V
V
V
×
×
×
L
BA0
L
L
H
×
L
×
H
V
V
V
V
V
×
×
×
×
×
×
L
V
A10
H
H
V
H
×
×
×
L
L
L
×
×
L
A9 - A0
A11
×
×
×
V
V
V
V
V
×
×
×
×
V
06/18/07
Rev. D