IS42VM32160E Datasheet, PDF (17/33 Pages) Integrated Silicon Solution, Inc – Auto refresh and self refresh

IS42/45SM/RM/VM32160E
Table6: CKE Truth Table
Current
State
CKE
Command
Prev
Cycle
Current
Cycle
/CS
/RAS
/CAS
/WE
BA
H
X
X
X
X
X
X
L
H
H
X
X
X
X
L
Self
Refresh
L
L
L
L
H
L
Power
Down
L
L
H
Deep
Power
L
Down
L
H
L
H
H
H
X
H
L
H
H
L
X
H
L
H
L
X
X
H
L
L
X
X
X
L
X
X
X
X
X
X
X
X
X
X
X
H
X
X
X
X
H
L
H
H
H
X
L
X
X
X
H
L
X
L
X
X
X
X
L
X
L
X
X
X
X
X
X
X
X
X
X
X
H
X
X
X
X
X
L
X
X
X
X
X
A0-A12
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
H
H
H
H
All
Banks
H
Idle
H
H
H
H
L
H
Any
State
H
other
than
listed
L
above
L
H
H
X
X
X
H
L
H
X
X
H
L
L
H
X
H
L
L
L
H
X
X
H
L
L
L
L
OP CODE
L
H
X
X
X
L
L
H
X
X
L
L
L
H
X
L
L
L
L
H
X
X
L
L
L
L
L
OP CODE
X
X
X
X
X
X
X
H
X
X
X
X
X
X
L
X
X
X
X
X
X
H
X
X
X
X
X
X
L
X
X
X
X
X
X
Action
Note
INVALID
2
Exit Self Refresh with Device
Deselect
3
Exit Self Refresh with No
Operation
3
ILLEGAL
3
ILLEGAL
3
ILLEGAL
3
Maintain Self Refresh
INVALID
2
Power Down Mode Exit, All
Banks Idle
3
ILLEGAL
3
Maintain Power Down Mode
INVALID
2
Deep Power Down Mode Exit
6
Maintain Deep Power Down
Mode
Refer to the Idle State
4
section of the Current State
Truth Table
4
4
Auto Refresh
Mode Register Set
5
Refer to the Idle State
4
section of the Current State
Truth Table
4
4
Entry Self Refresh
5
Mode Register Set
Power Down
5
Refer to Operations of the
Current State Truth Table
Begin Clock Suspend next
cycle
Exit Clock Suspend next
cycle
Maintain Clock Suspend
Rev. B | Oct. 2014
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