參數(shù)資料
型號: W989D6CBGX7E
廠商: WINBOND ELECTRONICS CORP
元件分類: DRAM
英文描述: 32M X 16 DDR DRAM, 5.4 ns, PBGA54
封裝: 8 X 9 MM, 0.80 MM PITCH, HALOGEN FREE AND LEAD FREE, VFBGA-54
文件頁數(shù): 10/67頁
文件大小: 1469K
代理商: W989D6CBGX7E
W989D6CB / W989D2CB
512Mb Mobile LPSDR
Publication Release Date: Jun, 27, 2011
- 18 -
Revision A01-004
7.1.3 Function Truth Table for CKE
Current State
CKE
CS
RAS
CAS
WE
Address
Action
Notes
n-1
n
Self refresh
H
X
N/A
L
H
X
Exit Self Refresh → Idle after tRFC
L
H
L
H
X
Exit Self Refresh → Idle after tRFC
L
H
L
H
L
X
ILLEGAL
L
H
L
X
ILLEGAL
L
X
Maintain Self Refresh
Power-Down
H
X
N/A
L
H
X
Exit Power Down → Idle after 1 clock cycle
L
H
X
L
X
Maintain Power-Down
Deep Power-Down
H
X
N/A
L
H
X
Exit Deep Power-
Down → Exit Sequence
L
X
Maintain Deep Power-Down
All banks idle
H
X
Refer to Function Truth Table
H
L
H
X
Enter Power-down
2
H
L
H
X
Enter Power-Down
2
H
L
H
L
X
Enter Deep Power-Down
3
H
L
H
X
Self Refresh
1
H
L
H
L
X
ILLEGAL
H
L
X
ILLEGAL
L
X
Power-Down
2
Row Active
H
X
Refer to Function Truth Table
H
L
H
X
Enter Power down
2
H
L
H
X
Enter Power down
2
H
L
H
X
ILLEGAL
H
L
H
L
X
ILLEGAL
H
L
X
ILLEGAL
L
X
Power-
Down → Row Active or Maintain PD
Any
state
other
than
listed above
H
X
Refer to Function Truth Table
Note:
1. Self refresh can enter only from the all banks idle state.
2. Power-down can enter only from the all banks idle or row active state.
3. Deep power-down can enter only from the all banks idle state.
Remark: H = High level, L = Low level, X = High or Low level (Don’t care), V = Valid data.
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