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參數資料
型號: W942516CH
廠商: WINBOND ELECTRONICS CORP
英文描述: 4M X 4 BANKS X 16 BIT DDR SDRAM
中文描述: 4米× 4銀行× 16位DDR SDRAM
文件頁數: 16/47頁
文件大小: 2809K
代理商: W942516CH
W942516CH
- 16 -
8.2 Function Truth Table
(Note 1)
CURRENT
STATE
CS
RAS
CAS
WE
ADDRESS
COMMAND
ACTION
NOTES
H
X
X
X
X
DSL
Nop
L
H
H
X
X
NOP/BST
Nop
L
H
L
H
BS, CA, A10
READ/READA
ILLEGAL
3
L
H
L
L
BS, CA, A10
WRIT/WRITA
ILLEGAL
3
L
L
H
H
BS, RA
ACT
Row activating
L
L
H
L
BS, A10
PRE/PREA
Nop
L
L
L
H
X
AREF/SELF
Refresh or Self refresh
2
Idle
L
L
L
L
Op-Code
MRS/EMRS
Mode register accessing
2
H
X
X
X
X
DSL
Nop
L
H
H
X
X
NOP/BST
Nop
L
H
L
H
BS, CA, A10
READ/READA
Begin read: Determine AP
4
L
H
L
L
BS, CA, A10
WRIT/WRITA
Begin write: Determine AP
4
L
L
H
H
BS, RA
ACT
ILLEGAL
3
L
L
H
L
BS, A10
PRE/PREA
Precharge
5
L
L
L
H
X
AREF/SELF
ILLEGAL
Row Active
L
L
L
L
Op-Code
MRS/EMRS
ILLEGAL
H
X
X
X
X
DSL
Continue burst to end
L
H
H
H
X
NOP
Continue burst to end
L
H
H
L
X
BST
Burst stop
L
H
L
H
BS, CA, A10
READ/READA
Term burst, new read: Determine AP
6
L
H
L
L
BS, CA, A10
WRIT/WRITA
ILLEGAL
L
L
H
H
BS, RA
ACT
ILLEGAL
3
L
L
H
L
BS, A10
PRE/PREA
Term burst, precharging
L
L
L
H
X
AREF/SELF
ILLEGAL
Read
L
L
L
L
Op-Code
MRS/EMRS
ILLEGAL
H
X
X
X
X
DSL
Continue burst to end
L
H
H
H
X
NOP
Continue burst to end
L
H
H
L
X
BST
ILLEGAL
L
H
L
H
BS, CA, A10
READ/READA
Term burst, start read: Determine AP
6, 7
L
H
L
L
BS, CA, A10
WRIT/WRITA
Term burst, start read: Determine AP
6
L
L
H
H
BS, RA
ACT
ILLEGAL
3
L
L
H
L
BS, A10
PRE/PREA
Term burst. precharging
8
L
L
L
H
X
AREF/SELF
ILLEGAL
Write
L
L
L
L
Op-Code
MRS/EMRS
ILLEGAL
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