參數(shù)資料
型號: HY5DU56822CT-D
廠商: Hynix Semiconductor Inc.
英文描述: 256M-P DDR SDRAM
中文描述: 256M磷DDR SDRAM內(nèi)存
文件頁數(shù): 14/34頁
文件大?。?/td> 248K
代理商: HY5DU56822CT-D
Rev. 0.3 / Oct. 2003 14
HY5DU56422CT-D4/ D43
HY5DU56822CT-D4/ D43
HY5DU561622CT-D4/ D43
CKE FUNCTION TRUTH TABLE
Note :
When CKE=L, all DQ and DQS must be in Hi-Z state.
1. CKE and /CS must be kept high for a minimum of 200 stable input clocks before issuing any command.
2. All command can be stored after 2 clocks from low to high transition of CKE.
3. Illegal if CLK is suspended or stopped during the power down mode.
4. Self refresh can be entered only from the all banks idle state.
5. Disabling CLK may cause malfunction of any bank which is in active state.
Current
State
CKEn-
1
CKEn
/ CS
/ RAS
/ CAS
/ WE
/ ADD
Action
SELF
REFRESH
1
H
X
X
X
X
X
X
INVALID
L
H
H
X
X
X
X
Exit self refresh, enter idle after tSREX
L
H
L
H
H
H
X
Exit self refresh, enter idle after tSREX
L
H
L
H
H
L
X
ILLEGAL
L
H
L
H
L
X
X
ILLEGAL
L
H
L
L
X
X
X
ILLEGAL
L
L
X
X
X
X
X
NOP, continue self refresh
POWER
DOWN
2
H
X
X
X
X
X
X
INVALID
L
H
H
X
X
X
X
Exit power down, enter idle
L
H
L
H
H
H
X
Exit power down, enter idle
L
H
L
H
H
L
X
ILLEGAL
L
H
L
H
L
X
X
ILLEGAL
L
H
L
L
X
X
X
ILLEGAL
L
L
X
X
X
X
X
NOP, continue power down mode
ALL BANKS
IDLE
4
H
H
X
X
X
X
X
See operation command truth table
H
L
L
L
L
H
X
Enter self refresh
H
L
H
X
X
X
X
Exit power down
H
L
L
H
H
H
X
Exit power down
H
L
L
H
H
L
X
ILLEGAL
H
L
L
H
L
X
X
ILLEGAL
H
L
L
L
H
X
X
ILLEGAL
H
L
L
L
L
L
X
ILLEGAL
L
L
X
X
X
X
X
NOP
ANY STATE
OTHER
THAN
ABOVE
H
H
X
X
X
X
X
See operation command truth table
H
L
X
X
X
X
X
ILLEGAL
5
L
H
X
X
X
X
X
INVALID
L
L
X
X
X
X
X
INVALID
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