m52s128168a-7tig Elite Semiconductor Memory Technology Inc., m52s128168a-7tig Datasheet - Page 29

• Manufacturer Part Number: m52s128168a-7tig
• Description: 2m X 16 Bit X 4 Banks Synchronous Dram
• Manufacturer: Elite Semiconductor Memory Technology Inc.

ESMT
SELF-REFRESHING*
ABBREVIATIONS :
Note :
Elite Semiconductor Memory Technology Inc.
ALL BANKS IDLE*2
ANY STATE other
than listed above
POWER DOWN
H = High Level, L = Low level, V = Valid, X = Don’t Care
DEEP POWER
Current State
DOWN
1. CKE Low to High transition will re-enable CLK, CLK and other inputs asynchronously. A minimum setup time must be
2. Power-Down and Self-Refresh can be entered only from All Bank Idle state.
3. The Deep Power Down mode is exited by asserting CKE high and full initialization is required after exiting Deep Power
1
satisfied before issuing any command other than EXIT.
Down mode.
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
X
H
H
H
H
H
X
H
X
H
H
H
n
L
L
L
L
L
L
L
L
L
L
CS
H
H
H
X
L
L
L
L
X
X
X
X
X
X
X
L
L
L
L
L
L
X
Preliminary
RAS
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
CAS
X
X
H
H
X
X
X
X
X
X
X
X
X
X
H
H
X
X
X
L
L
L
WE
X
X
H
X
X
X
X
X
X
X
X
X
X
H
X
H
X
X
X
X
L
L
Add
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
INVALID
Exit Self-Refresh
Exit Self-Refresh
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Self-Refresh)
INVALID
Exit Power Down
NOP (Maintain Power Down)
INVALID
Enter Self-Refresh
Exit Power Down
Exit Power Down
ILLEGAL
ILLEGAL
ILLEGAL
Exit Deep Power Down *3
NOP (Maintain Deep Power Down)
Refer to Function True Table
Refer to Current State = Power Down
Refer to Function True Table
Action
Revision : 1.4
Publication Date : Sep. 2008
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