參數(shù)資料
型號: μPD4811650
廠商: NEC Corp.
英文描述: 16M Synchronous Graphics Memory (SGRAM)(16M同步圖形存儲器)
中文描述: 1,600同步圖形存儲器(SGRAM)(1,600同步圖形存儲器)
文件頁數(shù): 16/96頁
文件大?。?/td> 1517K
代理商: ΜPD4811650
16
Preliminary Data Sheet
μ
PD4811650 for Rev. E
(2/7)
Current state
/CS /RAS /CAS /WE DSF
Address
Command
Action
Notes
Read
H
x
x
x
x
x
DESL
Continue burst to end
Bank active
L
H
H
H
x
x
NOP
Continue burst to end
Bank active
L
H
H
L
H
x
Undefined
ILLEGAL
L
H
H
L
L
x
BST
Burst stop
Bank active
L
H
L
H
H
x
Undefined
ILLEGAL
L
H
L
H
L
BA, CA, A9
READ/READA
Term burst, new read: Determine AP
7
L
H
L
L
H
BA, CA, A9
BW/BWA
Term burst, Start block write: Determine
AP
7, 8
L
H
L
L
L
BA, CA, A9
WRIT/WRITA
Term burst, Start write: Determine AP
7, 8
L
L
H
H
H
BA, RA
ACTWPB
ILLEGAL
3
L
L
H
H
L
BA, RA
ACT
ILLEGAL
3
L
L
H
L
H
x
Undefined
ILLEGAL
L
L
H
L
L
BA, A9
PRE/PALL
Term burst, precharge timing for reads
L
L
L
H
H
x
Undefined
ILLEGAL
L
L
L
H
L
x
REF/SELF
ILLEGAL
L
L
L
L
H
Op-Code
SRS
ILLEGAL
L
L
L
L
L
Op-Code
MRS
ILLEGAL
Write/Block write
H
x
x
x
x
x
DESL
Continue burst to end
Write recovering
L
H
H
H
x
x
NOP
Continue burst to end
Write recovering
L
H
H
L
H
x
Undefined
ILLEGAL
L
H
H
L
L
x
BST
Burst stop
Bank active
L
H
L
H
H
x
Undefined
ILLEGAL
L
H
L
H
L
BA, CA, A9
READ/READA
Term burst, start read: Determine AP
7, 8
L
H
L
L
H
BA, CA, A9
BW/BWA
Term burst, new block write: Determine AP
7
L
H
L
L
L
BA, CA, A9
WRIT/WRITA
Term burst, new write: Determine AP
7
L
L
H
H
H
BA, RA
ACTWPB
ILLEGAL
3
L
L
H
H
L
BA, RA
ACT
ILLEGAL
3
L
L
H
L
H
x
Undefined
ILLEGAL
L
L
H
L
L
BA, A9
PRE/PALL
Term burst, precharge timing for writes
3, 9
L
L
L
H
H
x
Undefined
ILLEGAL
L
L
L
H
L
x
REF/SELF
ILLEGAL
L
L
L
L
H
Op-Code
SRS
ILLEGAL
L
L
L
L
L
Op-Code
MRS
ILLEGAL
#
#
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