EDS2504ACTA/08ACTA/16ACTA, EDS2504APTA/08APTA/16APTA
DQM Truth Table
CKE
DQM
Commands
Symbol
ENB
n – 1
H
n
×
×
×
×
×
×
UDQM
LDQM
Write enable/output enable
L
Write inhibit/output disable
MASK
ENBU
ENBL
H
H
L
Upper byte write enable/output enable
Lower byte write enable/output enable
Upper byte write inhibit/output disable
Lower byte write inhibit/output disable
H
×
L
×
H
H
×
H
×
MASKU
MASKL
H
H
Remark: H: VIH. L: VIL. ×: VIH or VIL
Write: IDID is needed.
Read: IDOD is needed.
CKE Truth Table
CKE
Current state
Activating
Any
Function
Symbol
n – 1
H
L
n
/CS
×
/RAS
×
/CAS
×
/WE
Address
Clock suspend mode entry
Clock suspend mode
Clock suspend mode exit
CBR (auto) refresh command
Self refresh entry
L
×
×
×
×
×
×
×
×
×
×
×
×
L
×
×
×
×
Clock suspend
Idle
L
H
H
L
×
×
×
×
REF
H
H
L
L
L
L
H
H
H
×
Idle
SELF
L
L
L
Self refresh
Self refresh exit
H
H
L
L
H
×
H
×
L
H
L
Idle
Power down entry
Power down exit
H
H
L
H
×
H
×
H
×
L
H
H
L
Power down
H
H
×
×
×
L
H
H
H
Remark: H: VIH. L: VIL. ×: VIH or VIL
Data Sheet E0110E30 (Ver. 3.0)
17
ELPIDA [ ELPIDA MEMORY ]
