
Data Sheet M14376EJ2V0DS00
13
μ
PD4564323 for Rev.
E
4. Truth Table
4.1 Command Truth Table
Function
Symbol
CKE
n – 1
/CS
/RAS
/CAS
/WE
BA0,
BA1
×
×
×
V
V
V
V
V
V
×
L
A10
A9 - A0
n
×
×
×
×
×
×
×
×
×
×
×
Device deselect
No operation
Burst stop
Read
Read with auto precharge
Write
Write with auto precharge
Bank activate
Precharge select bank
Precharge all banks
Mode register set
DESL
NOP
BST
READ
READA
WRIT
WRITA
ACT
PRE
PALL
MRS
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
×
H
H
H
H
H
H
L
L
L
L
×
H
H
L
L
L
L
H
H
H
L
×
H
L
H
H
L
L
H
L
L
L
×
×
×
L
H
L
H
V
L
H
L
×
×
×
V
V
V
V
V
×
×
V
Remark
H = High level, L = Low level,
×
= High or Low level (Don't care), V = Valid data input
4.2 DQM Truth Table
Function
Symbol
CKE
DQM
n-1
n
0
1
2
3
Data write/output enable
ENB
H
×
L
Data mask/output disable
MASK
H
×
H
DQ0 - DQ7 write enable/output enable
ENB0
H
×
L
×
×
×
DQ8 - DQ15 write enable/output enable
ENB1
H
×
×
L
×
×
DQ16 - DQ23 write enable/output enable
ENB2
H
×
×
×
L
×
DQ24 - DQ31 write enable/output enable
ENB3
H
×
×
×
×
L
DQ0 - DQ7 write inhibit/output disable
MASK0
H
×
H
×
×
×
DQ8 - DQ15 write inhibit/output disable
MASK1
H
×
×
H
×
×
DQ16 - DQ23 write inhibit/output disable
MASK2
H
×
×
×
H
×
DQ24 - DQ31 write inhibit/output disable
MASK3
H
×
×
×
×
H
Remark
H = High level, L = Low level,
×
= High or Low level (Don't care)
4.3 CKE Truth Table
Current state
Function
Symbol
CKE
/CS
/RAS
/CAS
/WE
Address
n – 1
n
Activating
Clock suspend mode entry
H
L
×
×
×
×
×
Any
Clock suspend
L
L
×
×
×
×
×
Clock suspend
Clock suspend mode exit
L
H
×
×
×
×
×
Idle
CBR (auto) refresh command
REF
H
H
L
L
L
H
×
Idle
Self refresh entry
SELF
H
L
L
L
L
H
×
Self refresh
Self refresh exit
L
H
L
H
H
H
×
L
H
H
×
×
×
×
Idle
Power down entry
H
L
×
×
×
×
×
Power down
Power down exit
L
H
H
×
×
×
×
L
H
L
H
H
H
×
Remark
H = High level, L = Low level,
×
= High or Low level (Don't care)