參數(shù)資料
型號: V58C2256324SAH-36
廠商: PROMOS TECHNOLOGIES INC
元件分類: DRAM
英文描述: 8M X 32 DDR DRAM, 0.55 ns, PBGA144
封裝: ROHS COMPLIANT, BGA-144
文件頁數(shù): 22/37頁
文件大?。?/td> 370K
代理商: V58C2256324SAH-36
29
V58C2256324SA Rev. 1.4 August 2007
ProMOS TECHNOLOGIES
V58C2256324SA
FUNCTION TRUTH TABLE for CKE
Note: 1. CKE low-to-high transition re-enables inputs asynchronously. A minimum setup time to CLK must be satisfied before any
commands other than EXIT are executed.
Note: 2. Power Down can be entered when all banks are idle (banks can be active or precharged)
Note: 3. Self Refresh can be entered only from the Precharge / Idle state.
Abbreviations:
Current
State
CKE
n-1
CKE
n
CS#
RAS# CAS#
WE#
Address
Action
Notes
SELF
REFRESH
HX
X
INVALID
1
L
H
X
Exit Self-Refresh ( Idle after tSRX)1
L
H
L
H
X
Exit Self-Refresh ( Idle after tSRX)1
L
H
L
H
L
X
ILLEGAL
1
L
H
L
H
X
ILLEGAL
1
L
H
L
X
ILLEGAL
1
L
X
NOP ( Maintain Self Refresh)
1
POWER
DOWN
HX
X
INVALID
L
H
X
Exit Power Down ( Idle after tPDEX)1
L
X
NOP ( Maintain Power Down)
ALL
BANKS
IDLE
H
X
Refer to Function Truth Table
2
H
L
H
X
Enter Self Refresh
3
H
L
H
X
Enter Power-Down
2
H
L
H
X
Enter Power-Down
2
H
L
H
L
ILLEGAL
2
H
L
H
L
X
ILLEGAL
2
H
L
X
ILLEGAL
2
L
X
Refer to Power Down in this table
All other states
H
X
Refer to Funtion Truth Table
H
High Level
L
Low Level
X
DontCare
V
Valid Data Input
RA
Row Address
BA
Bank Address
PA
Precharge All
NOP
No Operation
CA
Column Address
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