参数资料
型号: HY5DV281622AT
英文描述: 8Mx16|3.3V|4K|45|DDR SDRAM - 128M
中文描述: 8M × 16位| 3.3 | 4K的| 45 | DDR SDRAM内存- 128M的
文件页数: 9/27页
文件大小: 273K
代理商: HY5DV281622AT
Rev. 0.3/May. 02
9
HY5DV281622AT
OPERATION COMMAND TRUTH TABLE - I
Current
State
/CS
/RAS
/CAS
/WE
Address
Command
Action
IDLE
H
X
X
X
X
DSEL
NOP or power down
3
L
H
H
H
X
NOP
NOP or power down
3
L
H
H
L
X
BST
ILLEGAL
4
L
H
L
H
BA, CA, AP
READ/READAP
ILLEGAL
4
L
H
L
L
BA, CA, AP
WRITE/WRITEAP
ILLEGAL
4
L
L
H
H
BA, RA
ACT
Row Activation
L
L
H
L
BA, AP
PRE/PALL
NOP
L
L
L
H
X
AREF/SREF
Auto Refresh or Self Refresh
5
L
L
L
L
OPCODE
MRS
Mode Register Set
ROW
ACTIVE
H
X
X
X
X
DSEL
NOP
L
H
H
H
X
NOP
NOP
L
H
H
L
X
BST
ILLEGAL
4
L
H
L
H
BA, CA, AP
READ/READAP
Begin read : optional AP
6
L
H
L
L
BA, CA, AP
WRITE/WRITEAP
Begin write : optional AP
6
L
L
H
H
BA, RA
ACT
ILLEGAL
4
L
L
H
L
BA, AP
PRE/PALL
Precharge
7
L
L
L
H
X
AREF/SREF
ILLEGAL
11
L
L
L
L
OPCODE
MRS
ILLEGAL
11
READ
H
X
X
X
X
DSEL
Continue burst to end
L
H
H
H
X
NOP
Continue burst to end
L
H
H
L
X
BST
Terminate burst
L
H
L
H
BA, CA, AP
READ/READAP
Term burst, new read:optional AP
8
L
H
L
L
BA, CA, AP
WRITE/WRITEAP
ILLEGAL
L
L
H
H
BA, RA
ACT
ILLEGAL
4
L
L
H
L
BA, AP
PRE/PALL
Term burst, precharge
L
L
L
H
X
AREF/SREF
ILLEGAL
11
L
L
L
L
OPCODE
MRS
ILLEGAL
11
WRITE
H
X
X
X
X
DSEL
Continue burst to end
L
H
H
H
X
NOP
Continue burst to end
L
H
H
L
X
BST
ILLEGAL
4
L
H
L
H
BA, CA, AP
READ/READAP
Term burst, new read:optional AP
8
L
H
L
L
BA, CA, AP
WRITE/WRITEAP
Term burst, new write:optional AP
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