K4H510438A-TCA0 SAMSUNG [Samsung semiconductor], K4H510438A-TCA0 Datasheet - Page 38
![no-image](/images/no-image-200.jpg)
K4H510438A-TCA0
Manufacturer Part Number
K4H510438A-TCA0
Description
128Mb DDR SDRAM
Manufacturer
SAMSUNG [Samsung semiconductor]
Datasheet
1.K4H510438A-TCA0.pdf
(53 pages)
- Current page: 38 of 53
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128Mb DDR SDRAM
ABBREVIATIONS :
Note :
REFRESHING
Current State
ANY STATE
ALL BANKS
listed above
H=High Level, L=Low level, X=Don t Care
8. CKE Low to High transition will re-enable CK, CK and other inputs asynchronously. A minimum setup time must be satisfied
9. Power-Down and Self-Refresh can be entered only from All Bank Idle state.
ILLEGAL = Device operation and/or data integrity are not guaranteed.
1. All entries assume that CKE was High during the preceding clock cycle and the current clock cycle.
2. ILLEGAL to bank in specified state ; function may be legal in the bank indicated by BA, depending on the state of that bank.
3. Must satisfy bus contention, bus turn around and write recovery requirements.
4. NOP to bank precharging or in idle sate. May precharge bank indicated by BA.
5. ILLEGAL if any bank is not idle.
6. Refer to "3.3.11 Read with Auto Precharge" in page 29 for detailed information.
7. Refer to "3.3.12 Write with Auto Precharge" in page 30 for detailed information.
other than
POWER
DOWN
IDLE
SELF-
before issuing any command other than EXIT.
*9
*8
CKE
n-1
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
CKE
H
H
H
H
H
H
H
H
n
L
L
L
L
L
L
L
L
X
CS
H
X
X
X
X
H
X
X
L
L
L
L
L
L
L
L
L
Table 9-5. Functional truth table
RAS
H
H
H
H
H
H
X
X
X
X
X
X
X
X
L
L
L
CAS
H
H
H
H
X
X
X
X
X
X
X
X
X
X
L
L
L
- 38 -
WE
H
H
H
X
X
X
X
X
X
X
X
X
X
X
X
L
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Add
Exit Self-Refresh
Exit Self-Refresh
ILLEGAL
ILLEGAL
ILLEGAL
NOPeration(Maintain Self-Refresh)
Exit Power Down(Idle after
NOPeration(Maintain Power Down)
Refer to Function True Table
Enter Self-Refresh
Enter Power Down
Enter Power Down
ILLEGAL
ILLEGAL
ILLEGAL
Refer to Current State=Power Down
Refer to Function Truth Table
REV. 1.0 November. 2. 2000
Action
t
PDEX
)
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