is43r32800 Integrated Silicon Solution, Inc., is43r32800 Datasheet - Page 11

• Manufacturer Part Number: is43r32800
• Description: 256mb Ddr Synchronous Dram
• Manufacturer: Integrated Silicon Solution, Inc.

IS43R32800
Integrated Silicon Solution, Inc. — www.issi.com
Rev. A
01/14/09
ABBR EVIATI ONS :
NO TES :
1. CKE L ow to Hi gh transition will re-enable CLK and other inputs asynchronously.
2. Power-Down and Self-Refresh can be entered only from the Al l B anks Idle State.
3. Must be legal command.
H=Hi gh Level, L= Low L evel, X =Don't Care
A minimum setup time must be satisfied before any command other than EXIT.
CKE TRUTH TABLE
other than listed
REFR ESHI NG
ANY STATE
Curren t State
ALL BANKS
POWER
DOWN
SELF -
above
IDLE
CKE n-1
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
CKE n
H
H
H
H
H
L
X
H
L
H
X
H
H
L
X
L
L
L
L
L
L
L
/CS
X
H
X
X
X
X
X
H
X
X
X
X
X
L
L
L
L
L
L
L
L
L
/RAS
X
H
H
H
X
X
X
X
X
H
H
H
X
X
X
X
X
X
L
L
X
L
/CAS
X
X
H
H
X
X
X
X
X
X
X
H
H
X
X
X
X
X
X
L
L
L
/WE
X
X
X
X
X
X
X
X
X
H
X
X
X
X
X
X
X
X
H
H
L
L
Addr ess
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
I NV ALID
Exit Self-Refresh (Idle after tRC )
Exit Self-Refresh (Idle after tRC )
I LL EGAL
I LL EGAL
I LL EGAL
N OP (M aintain Self- Refresh)
I NV AL ID
Exit Power Downto Idle
N OP (M aintain Self- Refresh)
R efer to FunctionTruth Table
Enter Self-R efresh
Enter Power Down
Enter Power Down
I LL EGAL
I LL EGAL
I LL EG AL
R efer to Current State =Power Down
R efer to FunctionTruth Table
B egin CL K S uspend at Next Cycle
Exit CLK Suspend at Next Cycle
M aintain CLK Suspend
A ction
Notes
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
3
3
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