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| 型號(hào)： | V54C3256804VB |
| 廠商： | Mosel Vitelic, Corp. |
| 英文描述： | 256Mbit SDRAM 3.3 VOLT, TSOP II / SOC BGA / WBGA PACKAGE 16M X 16, 32M X 8, 64M X 4 |
| 中文描述： | 片256Mbit SDRAM的3.3伏，第二的TSOP /系統(tǒng)芯片的BGA / WBGA包裝16米x 16，32 × 8，64米× 4 |
| 文件頁數(shù)： | 48/52頁 |
| 文件大小： | 853K |
| 代理商： | V54C3256804VB |
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48
V54C3256(16/80/40)4V(T/S/B) Rev. 1.6 September 2002
MOSEL VITELIC
V54C3256(16/80/40)4V(T/S/B)
Clock Enable (CKE) Truth Table:
Abbreviations:
RA = Row Address BS = Bank Address
CA = Column Address AP = Auto Precharge
Notes for SDRAM function truth table:
1. Current State is state of the bank determined by BS. All entries assume that CKE was active (HIGH) during the preceding clock cycle.
2. Illegal to bank in specified state; Function may be legal in the bank indicated by BS, depending on the state of that bank.
3. Must satisfy bus contention, bus turn around, and/or write recovery requirements.
4. NOP to bank precharging or in Idle state. May precharge bank(s) indicated by BS (andAP).
5. Illegal if any bank is not Idle.
6. 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.
7. Power-Down and Self-Refresh can be entered only from the All Banks Idle State.
8. Must be legal command as defined in the SDRAM function truth table.
STATE(n)
CKE
n-1
CKE
n
CS
RAS
CAS
WE
Addr
ACTION
Self-Refresh
6
H
L
L
L
L
L
L
X
H
H
H
H
H
L
X
H
L
L
L
L
X
X
X
H
H
H
L
X
X
X
H
H
L
X
X
X
X
H
L
X
X
X
X
X
X
X
X
X
X
INVALID
EXIT Self-Refresh, Idle after tRC
EXIT Self-Refresh, Idle after tRC
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Self-Refresh)
Power-Down
H
L
L
L
L
L
L
X
H
H
H
H
H
L
X
H
L
L
L
L
X
X
X
H
H
H
L
X
X
X
H
H
L
X
X
X
X
H
L
X
X
X
X
X
X
X
X
X
X
INVALID
EXIT Power-Down, > Idle.
EXIT Power-Down, > Idle.
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Low-Power Mode)
All. Banks
Idle
7
H
H
H
H
H
H
H
H
L
H
L
L
L
L
L
L
L
L
X
H
L
L
L
L
L
L
X
X
X
H
H
H
L
L
L
X
X
X
H
H
L
H
L
L
X
X
X
H
L
X
X
H
L
X
X
X
X
X
X
X
X
X
X
Refer to the function truth table
Enter Power- Down
Enter Power- Down
ILLEGAL
ILLEGAL
ILLEGAL
Enter Self-Refresh
ILLEGAL
NOP
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