IS42S32400E Ver la hoja de datos (PDF) - Integrated Silicon Solution
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IS42S32400E Datasheet PDF : 60 Pages
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IS42S32400E, IS45S32400E
CKE RELATED COMMAND TRUTH TABLE(1)
Current State
Operation
CKE
n-1
n
CS
RAS CAS WE Address
Self-Refresh (S.R.) INVALID, CLK (n - 1) would exit S.R.
H
X
X
X
X
X
X
Self-Refresh Recovery(2)
L
H
H
X
X
X
X
Self-Refresh Recovery(2)
L
H
L
H
H
X
X
Illegal
L
H
L
H
L
X
X
Illegal
L
H
L
L
X
X
X
Maintain S.R.
L
L
X
X
X
X
X
Self-Refresh Recovery Idle After trc
H
H
H
X
X
X
X
Idle After trc
H
H
L
H
H
X
X
Illegal
H
H
L
H
L
X
X
Illegal
H
H
L
L
X
X
X
Begin clock suspend next cycle(5)
H
L
H
X
X
X
X
Begin clock suspend next cycle(5)
H
L
L
H
H
X
X
Illegal
H
L
L
H
L
X
X
Illegal
H
L
L
L
X
X
X
Exit clock suspend next cycle(2)
L
H
X
X
X
X
X
Maintain clock suspend
L
L
X
X
X
X
X
Power-Down (P.D.) INVALID, CLK (n - 1) would exit P.D.
H
X
X
X
X
X
—
EXIT P.D. --> Idle(2)
L
H
X
X
X
X
X
Maintain power down mode
L
L
X
X
X
X
X
Both Banks Idle
Refer to operations in Operative Command Table H
H
H
X
X
X
—
Refer to operations in Operative Command Table H
H
L
H
X
X
—
Refer to operations in Operative Command Table H
H
L
L
H
X
—
Auto-Refresh
H
H
L
L
L
H
X
Refer to operations in Operative Command Table H
H
L
L
L
L Op - Code
Refer to operations in Operative Command Table H
L
H
X
X
X
—
Refer to operations in Operative Command Table H
L
L
H
X
X
—
Refer to operations in Operative Command Table H
L
L
L
H
X
—
Self-Refresh(3)
H
L
L
L
L
H
X
Refer to operations in Operative Command Table H
L
L
L
L
L Op - Code
Power-Down(3)
L
X
X
X
X
X
X
Any state
Refer to operations in Operative Command Table H
H
X
X
X
X
X
other than
Begin clock suspend next cycle(4)
H
L
X
X
X
X
X
listed above
Exit clock suspend next cycle
L
H
X
X
X
X
X
Maintain clock suspend
L
L
X
X
X
X
X
Notes:
1. H : High level, L : low level, X : High or low level (Don’t care).
2. CKE Low to High transition will re-enable CLK and other inputs asynchronously. A minimum setup
time must be satisfied
before any command other than EXIT.
3. Power down and Self refresh can be entered only from the both banks idle state.
4. Must be legal command as defined in Operative Command Table.
5. Illegal if txsr is not satisfied.
12
Integrated Silicon Solution, Inc. - www.issi.com
Rev. D
05/18/09
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