參數(shù)資料
型號: EDD51321CBH
廠商: Elpida Memory, Inc.
英文描述: 512M bits DDR SDRAM
中文描述: 512M比特DDR內(nèi)存
文件頁數(shù): 15/55頁
文件大?。?/td> 589K
代理商: EDD51321CBH
EDD51321CBH
Preliminary Data Sheet E1094E30 (Ver. 3.0)
15
Function Truth Table
The following tables show the operations that are performed when each command is issued in each state of the
DDR SDRAM.
Current state
/CS
/RAS /CAS /WE
Address
Command
Operation
Precharging*
1
H
×
×
×
×
DESL
NOP
L
H
H
H
×
NOP
NOP
L
H
H
L
×
BST
ILLEGAL*
11
L
H
L
H
BA, CA, A10
READ/READA
ILLEGAL*
11
L
H
L
L
BA, CA, A10
WRIT/WRITA
ILLEGAL*
11
L
L
H
H
BA, RA
ACT
ILLEGAL*
11
L
L
H
L
BA, A10
PRE, PALL
NOP
L
L
L
×
×
ILLEGAL
Idle*
2
H
×
×
×
×
DESL
NOP
L
H
H
H
×
NOP
NOP
L
H
H
L
×
BST
NOP
L
H
L
H
BA, CA, A10
READ/READA
ILLEGAL*
11
L
H
L
L
BA, CA, A10
WRIT/WRITA
ILLEGAL*
11
L
L
H
H
BA, RA
ACT
Activating
L
L
H
L
BA, A10
PRE, PALL
NOP
L
L
L
H
×
REF, SELF
Refresh/
Self-refresh*
12
Mode register set*
12
L
L
L
L
MODE
MRS
Refresh
(auto-refresh)*
3
H
×
×
×
×
DESL
NOP
L
H
H
H
×
NOP
NOP
H
H
H
L
×
BST
ILLEGAL
L
H
L
×
×
ILLEGAL
L
L
×
×
×
ILLEGAL
Activating*
4
H
×
×
×
×
DESL
NOP
L
H
H
H
×
NOP
NOP
L
H
H
L
×
BST
ILLEGAL*
11
L
H
L
H
BA, CA, A10
READ/READA
ILLEGAL*
11
L
H
L
L
BA, CA, A10
WRIT/WRITA
ILLEGAL*
11
L
L
H
H
BA, RA
ACT
ILLEGAL*
11
L
L
H
L
BA, A10
PRE, PALL
ILLEGAL*
11
L
L
L
×
×
ILLEGAL
Active*
5
H
×
×
×
×
DESL
NOP
L
H
H
H
×
NOP
NOP
L
H
H
L
×
BST
NOP
L
H
L
H
BA, CA, A10
READ/READA
Starting read operation
L
H
L
L
BA, CA, A10
WRIT/WRITA
Starting write operation
L
L
H
H
BA, RA
ACT
ILLEGAL*
11
L
L
H
L
BA, A10
PRE, PALL
Pre-charge
L
L
L
×
×
ILLEGAL
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