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參數(shù)資料
| 型號(hào)： | W942516BH |
| 英文描述： | DRAM |
| 中文描述： | 內(nèi)存 |
| 文件頁數(shù)： | 16/45頁 |
| 文件大小： | 1601K |
| 代理商： | W942516BH |
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W942508BH
- 16 -
Function Truth Table, continued
CURRENT
STATE
CS
RAS
CAS
WE
ADDRESS
COMMAND
ACTION
NOTES
H
X
X
X
X
DSL
Nop
- >
Row active after t
WR
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
L
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
X
X
X
BS, CA, A10
BS, CA, A10
BS, RA
BS, A10
X
Op-Code
X
X
X
BS, CA, A10
BS, CA, A10
BS, RA
BS, A10
X
Op-Code
X
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
Nop
- >
Row active after t
WR
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop
- >
Enter precharge after t
WR
Nop
- >
Enter precharge after t
WR
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop
- >
Idle after t
RC
3
3
3
3
Write
Recovering
3
3
3
3
Write
Recovering
with Auto
Precharge
L
L
L
L
L
H
H
H
H
L
L
X
H
H
L
H
L
X
H
L
H
X
X
X
X
X
X
X
X
X
NOP
BST
READ/WRIT
ACT/PRE/PREA
AREF/SELF/MRS/EM
DSL
Nop
- >
Idle after t
RC
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Nop
- >
Row after t
MRD
Refreshing
L
L
L
L
H
H
H
L
H
H
L
X
H
L
X
X
X
X
X
X
NOP
BST
READ/WRIT
ACT/PRE/PREA/ARE
F/SELF/MRS/EMRS
Nop
- >
Row after t
MRD
ILLEGAL
ILLEGAL
ILLEGAL
Mode
Register
Accessing
Notes
:
1.
2.
3.
All entries assume that CKE was active (High level) during the preceding clock cycle and the current clock cycle.
Illegal if any bank is not idle.
Illegal to bank in specified states; Function may be legal in the bank indicated by Bank Address (BS), depending on the
state of that bank.
Illegal if t
RCD
is not satisfied.
Illegal if t
RAS
is not satisfied.
Must satisfy burst interrupt condition.
Must avoid bus contention, bus turn around, and/or satisfy write recovery requirements.
Must mask preceding data which don’t satisfy t
WR
4.
5.
6.
7.
8.
Remark: H = High level, L = Low level, X = High or Low level (Don’t care), V = Vali d data
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