IC42S16800D-7TL ISSI [Integrated Silicon Solution, Inc], IC42S16800D-7TL Datasheet - Page 13

• Manufacturer Part Number: IC42S16800D-7TL
• Description: 16Meg x 8, 8Meg x16 128-MBIT SYNCHRONOUS DRAM
• Manufacturer: ISSI [Integrated Silicon Solution, Inc]

IS42S81600D,
Integrated Silicon Solution, Inc. — www.issi.com
Rev. E
07/28/08
CKE RELATED COMMAND TRUTH TABLE
Current State
Self-Refresh (S.R.)
Self-Refresh Recovery
Power-Down (P.D.)
Both Banks Idle
Any state
other than
listed above
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
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 t
setup time must be satisfied
SRX
is not satisfied.
Operation
INVALID, CLK (n - 1) would exit S.R.
Self-Refresh Recovery
Self-Refresh Recovery
Illegal
Illegal
Maintain S.R.
Idle After t
Idle After t
Illegal
Illegal
Begin clock suspend next cycle
Begin clock suspend next cycle
Illegal
Illegal
Exit clock suspend next cycle
Maintain clock suspend
INVALID, CLK (n - 1) would exit P.D.
EXIT P.D. --> Idle
Maintain power down mode
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Auto-Refresh
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Self-Refresh
Refer to operations in Operative Command Table
Power-Down
Refer to operations in Operative Command Table
Begin clock suspend next cycle
Exit clock suspend next cycle
Maintain clock suspend
IS42S16800D
RC
RC
(3)
(3)
(2)
(2)
(2)
(2)
(5)
(5)
(4)
(1)
n-1
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
CKE
n
X
H
H
H
H
H
H
H
H
H
X
H
H
H
H
H
H
X
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
CS
X
H
X
H
H
X
X
X
X
X
H
H
X
X
X
X
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
RAS
X
X
H
H
L
X
X
H
H
L
X
H
H
L
X
X
X
X
X
X
H
L
L
L
X
H
L
L
L
X
X
X
X
X
CAS
X
X
H
L
X
X
X
H
L
X
X
H
L
X
X
X
X
X
X
X
X
H
L
L
X
X
H
L
L
X
X
X
X
X
WE Address
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
X
X
X
H
X
X
X
X
X
L
L
Op - Code
Op - Code
—
—
—
—
—
—
—
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
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