EDS1216AABH, EDS1216CABH
DQM Truth Table
CKE
Commands
Symbol
ENBU
ENBL
n – 1
H
H
n
×
×
×
×
UDQM
LDQM
Upper byte write enable/output enable
Lower byte write enable/output enable
Upper byte write inhibit/output disable
Lower byte write inhibit/output disable
L
×
H
×
×
L
×
H
MASKU
MASKL
H
H
Remark: H: VIH. L: VIL. ×: VIH or VIL
Write: lDID is needed.
Read: lDOD is needed.
CKE Truth Table
CKE
n – 1
H
Current state
Activating
Any
Function
Symbol
n
L
L
/CS
×
/RAS
×
/CAS
×
/WE
×
Address
Clock suspend mode entry
Clock suspend mode
Clock suspend mode exit
CBR (auto) refresh command
Self refresh entry
×
×
×
×
×
×
×
×
×
×
×
L
×
×
×
×
Clock suspend
Idle
L
H
H
L
×
×
×
×
REF
H
L
L
L
H
H
H
×
Idle
SELF
H
L
L
L
Self refresh
Self refresh exit
L
H
H
L
L
H
×
H
×
L
H
L
Idle
Power down entry
Power down exit
H
H
×
H
×
H
×
H
L
H
H
L
Power down
L
H
H
×
×
×
L
H
H
H
Remark: H: VIH. L: VIL. ×: VIH or VIL
Data Sheet E0410E40 (Ver. 4.0)
14
ELPIDA [ ELPIDA MEMORY ]
