
ISSI
12
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
ADVANCED INFORMATION
Rev. 00A
06/01/02
IS42S81600A, IS42S16800A, IS42S32400A
IS42LS81600A, IS42LS16800A, IS42LS32400A
CKE
n – 1 n
H
L
L
H
H
H
H
H
L
L
L
L
L
Current State /Function
Activating Clock suspend mode entry
Any Clock suspend mode
Clock suspend mode exit
Auto refresh command Idle
Self refresh entry Idle
Power down entry Idle
CS
×
×
×
L
L
L
H
L
L
H
L
H
×
RAS
×
×
×
L
L
H
×
H
H
×
H
×
×
CAS
WE
×
×
×
L
L
H
×
H
H
×
H
×
×
Address
×
×
×
×
×
×
×
×
×
×
×
×
×
L
L
H
H
L
L
L
L
H
H
H
H
H
×
×
×
H
H
H
×
L
H
×
H
×
×
Deep power down entry
Self refresh exit
Power down exit
Deep power down exit
Note: H=V
IH
, L=V
IL
x= V
IH
or V
IL
, V = Valid Data.
CKE TRUTH TABLE