IS42S81600D, IS42S16800D
CKE TRUTH TABLE
CKE
CurrentState/Function
n – 1 n
CS
×
RAS
CAS WE
Address
Activating Clock suspend mode entry
Any Clock suspend mode
Clock suspend mode exit
Auto refresh command Idle (REF)
Self refresh entry Idle (SELF)
Power down entry Idle
H
L
L
L
×
×
×
L
L
×
×
×
×
×
H
H
×
×
×
×
×
×
×
×
×
×
L
L
×
L
H
H
L
×
H
H
H
L
L
L
×
Self refresh exit
L
L
H
H
L
H
H
×
H
×
H
×
×
×
Power down exit
L
H
×
×
×
×
×
Note: H=VIH, L=VIL x= VIH or VIL, V = Valid Data.
Integrated Silicon Solution, Inc. — www.issi.com
9
Rev. E
07/28/08