EDD51323DBH-LS
Function Truth Table
The following tables show the operations that are performed when each command is issued in each state of the
DDR Mobile RAM.
Current state
Precharging*1
/CS
H
L
/RAS /CAS /WE Address
Command
Operation
×
×
×
×
DESL
NOP
H
H
H
H
L
H
H
L
H
L
×
NOP
NOP
L
×
BST
ILLEGAL*11
ILLEGAL*11
ILLEGAL*11
ILLEGAL*11
NOP
L
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
READ/READA
WRIT/WRITA
ACT
L
L
L
H
H
L
H
L
L
L
PRE, PALL
L
L
×
ILLEGAL
NOP
Idle*2
H
L
×
×
×
×
DESL
H
H
H
H
L
H
H
L
H
L
×
NOP
NOP
L
×
BST
NOP
L
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
READ/READA
WRIT/WRITA
ACT
ILLEGAL*11
ILLEGAL*11
Activating
NOP
L
L
L
H
H
H
L
L
L
PRE, PALL
Refresh/
L
L
H
L
L
×
L
L
×
H
L
×
REF, SELF
MRS
Self-refresh*12
MODE
Mode register set*12
Refresh
×
×
DESL
NOP
(auto-refresh)*3
L
H
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
H
H
H
L
H
H
L
H
L
×
NOP
BST
NOP
×
ILLEGAL
×
×
×
H
L
×
ILLEGAL
×
×
ILLEGAL
Activating*4
×
×
×
DESL
NOP
H
H
H
H
L
H
H
L
×
NOP
NOP
×
BST
ILLEGAL*11
ILLEGAL*11
ILLEGAL*11
ILLEGAL*11
ILLEGAL*11
ILLEGAL
H
L
BA, CA, A10
READ/READA
WRIT/WRITA
ACT
L
BA, CA, A10
H
H
L
H
L
BA, RA
L
BA, A10
PRE, PALL
L
×
×
H
L
×
Active*5
×
×
×
DESL
NOP
H
H
H
H
L
H
H
L
×
NOP
NOP
×
BST
NOP
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
READ/READA
WRIT/WRITA
ACT
Starting read operation
Starting write operation
ILLEGAL*11
Pre-charge
ILLEGAL
L
H
H
L
H
L
L
PRE, PALL
L
×
Preliminary Data Sheet E1432E20 (Ver. 2.0)
17
ELPIDA [ ELPIDA MEMORY ]
