EDS6432AFTA, EDS6432CFTA
DQM Truth Table
CKE
DQM
0
1
2
3
Function
Symbol
ENB
MASK
ENB0
n – 1
H
H
n
×
×
×
×
×
×
×
×
×
×
Data write / output enable
Data mask / output disable
L
H
L
×
×
×
H
×
×
×
L
H
×
L
×
×
×
H
×
×
L
H
×
×
L
×
×
×
H
×
L
H
×
×
×
L
×
×
×
H
DQ0 to DQ7 write enable/output enable
DQ8 to DQ15 write enable/output enable
DQ16 to DQ23 write enable/output enable
DQ24 to DQ31 write enable/output enable
DQ0 to DQ7 write inhibit/output disable
DQ8 to DQ15 write inhibit/output disable
DQ16 to DQ23 write inhibit/output disable
DQ24 to DQ31 write inhibit/output disable
H
ENB1
H
ENB2
H
ENB3
H
MASK0
MASK 1
MASK 2
MASK 3
H
H
H
H
Remark: H: VIH. L: VIL. ×: VIH or VIL
Write: lDID is needed.
Read: lDOD is needed.
CKE Truth Table
CKE
Current state
Activating
Any
Function
Symbol
n – 1
H
L
n
L
L
/CS
/RAS
/CAS
×
/WE
×
Address
Clock suspend mode entry
Clock suspend mode
Clock suspend mode exit
×
×
×
L
L
L
H
L
H
H
L
×
×
×
L
L
H
×
H
×
×
H
×
×
×
×
×
×
×
×
×
×
×
×
×
Clock suspend
Idle
L
H
H
L
×
×
CBR (auto) refresh command
Self refresh entry
REF
H
H
L
L
H
H
H
×
Idle
SELF
L
Self refresh
Self refresh exit
H
H
L
H
×
L
Idle
Power down entry
Power down exit
H
H
L
H
×
H
×
L
Power down
H
H
×
×
L
H
H
Remark: H: VIH. L: VIL. ×: VIH or VIL
Data Sheet E0487E50 (Ver. 5.0)
14
ELPIDA [ ELPIDA MEMORY ]
