IS42S16800B 데이터 시트보기 (PDF) - Integrated Silicon Solution
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IS42S16800B Datasheet PDF : 60 Pages
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IS42S81600B, IS42S16800B
ISSI ®
CKE RELATED COMMAND TRUTH TABLE(1)
CKE
Current State
Operation
n-1
n
Self-Refresh(S.R.) INVALID, CLK (n - 1) would exit S.R.
H
X
Self-Refresh Recovery(2)
L
H
Self-Refresh Recovery(2)
L
H
Illegal
L
H
Illegal
L
H
Maintain S.R.
L
L
Self-RefreshRecovery Idle After tRC
H
H
Idle After tRC
H
H
Illegal
H
H
Illegal
H
H
Begin clock suspend next cycle(5)
H
L
Begin clock suspend next cycle(5)
H
L
Illegal
H
L
Illegal
H
L
Exit clock suspend next cycle(2)
L
H
Maintain clock suspend
L
L
Power-Down(P.D.) INVALID, CLK (n - 1) would exit P.D.
H
X
EXIT P.D. --> Idle(2)
L
H
Maintain power down mode
L
L
Both Banks Idle
RefertooperationsinOperativeCommandTable H
H
RefertooperationsinOperativeCommandTable H
H
RefertooperationsinOperativeCommandTable H
H
Auto-Refresh
H
H
RefertooperationsinOperativeCommandTable H
H
RefertooperationsinOperativeCommandTable H
L
RefertooperationsinOperativeCommandTable H
L
RefertooperationsinOperativeCommandTable H
L
Self-Refresh(3)
H
L
RefertooperationsinOperativeCommandTable H
L
Power-Down(3)
L
X
Any state
RefertooperationsinOperativeCommandTable H
H
other than
Begin clock suspend next cycle(4)
H
L
listed above
Exit clock suspend next cycle
L
H
Maintain clock suspend
L
L
CS
RAS CAS
X
X
X
H
X
X
L
H
H
L
H
L
L
L
X
X
X
X
H
X
X
L
H
H
L
H
L
L
L
X
H
X
X
L
H
H
L
H
L
L
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
X
X
L
H
X
L
L
H
L
L
L
L
L
L
H
X
X
L
H
X
L
L
H
L
L
L
L
L
L
X
X
X
X
X
X
X
X
X
X
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 tSRX is not satisfied.
WE Address
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
—
H
X
L Op-Code
X
—
X
—
X
—
H
X
L Op-Code
X
X
X
X
X
X
X
X
X
X
12
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. E
05/01/06
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