IS42S16100E, IC42S16100E
(1)
CKE RELATED COMMAND TRUTH TABLE
CKE
n-1
Current State
Operation
n
X
H
H
H
H
L
CS RAS CAS WE A11 A10 A9-A0
Self-Refresh
Undefined
H
L
X
H
L
X
X
H
H
L
X
X
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Self-Refresh Recovery(2)
Self-Refresh Recovery(2)
Illegal(2)
L
L
L
Illegal(2)
L
L
X
X
X
H
L
Self-Refresh
L
X
H
L
X
X
H
H
L
Self-Refresh Recovery
Idle State After tr c Has Elapsed
Idle State After tr c Has Elapsed
Illegal
H
H
H
H
H
H
H
H
L
H
H
H
H
L
L
Illegal
L
X
X
H
L
Power-Down on the Next Cycle
Power-Down on the Next Cycle
Illegal
H
L
X
H
H
L
L
L
L
Illegal
L
L
X
X
X
X
X
Clock Suspend Termination on the Next Cycle (2)
H
L
X
X
X
X
X
X
X
X
Clock Suspend
Undefined
L
Power-Down
H
L
X
H
Power-Down Mode Termination, Idle After
That Termination(2)
Power-Down Mode
L
H
H
H
H
H
H
H
H
H
H
L
L
H
H
H
H
H
L
X
H
L
X
X
H
L
X
X
X
H
L
X
X
X
X
H
L
X
X
X
X
X
X
X
X
X
X
X
Both Banks Idle
No Operation
X
See the Operation Command Table
Bank Active Or Precharge
Auto-Refresh
X
L
X
L
L
X
Mode Register Set
L
L
L
OP CODE
See the Operation Command Table
See the Operation Command Table
See the Operation Command Table
Self-Refresh(3)
H
L
X
H
L
X
X
H
L
X
X
X
H
L
X
X
X
X
X
X
X
X
X
L
X
L
L
X
L
L
L
X
See the Operation Command Table
Power-Down Mode(3)
L
L
L
L
OP CODE
X
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Other States
See the Operation Command Table
Clock Suspend on the Next Cycle(4)
Clock Suspend Termination on the Next Cycle
H
H
L
H
L
Clock Suspend Termination on the Next CycleL
Notes:
1. H: HIGH level input, L: LOW level input, X: HIGH or LOW level input
2. The CLK pin and the other input are reactivated asynchronously by the transition of the CKE level from LOW to HIGH.
The minimum setup time (tc k a ) required before all commands other than mode termination must be satisfied.
3. Both banks must be set to the inactive (idle) state in advance to switch to power-down mode or self-refresh mode.
4. The input must be command defined in the operation command table.
18
Integrated Silicon Solution, Inc. — www.issi.com
Rev. C
01/22/08
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
