EDS5104ABTA Datasheet, PDF (17/52 Pages) Elpida Memory – 512M bits SDRAM

EDS5104ABTA, EDS5108ABTA, EDS5116ABTA
DQM Truth Table
Commands
Write enable/output enable
Write inhibit/output disable
Upper byte write enable/output enable
Lower byte write enable/output enable
Upper byte write inhibit/output disable
Lower byte write inhibit/output disable
Remark: H: VIH. L: VIL. ×: VIH or VIL
Write: IDID is needed.
Read: IDOD is needed.
CKE Truth Table
Current state
Activating
Any
Clock suspend
Idle
Idle
Self refresh
Function
Clock suspend mode entry
Clock suspend mode
Clock suspend mode exit
CBR (auto) refresh command
Self refresh entry
Self refresh exit
Idle
Power down entry
Power down
Power down exit
Remark: H: VIH. L: VIL. ×: VIH or VIL
Symbol
ENB
MASK
ENBU
ENBL
MASKU
MASKL
Symbol
REF
SELF
CKE
n–1
H
L
L
H
H
L
L
H
H
L
L
CKE
n–1
n
H
×
H
×
H
×
H
×
H
×
H
×
DQM
UDQM
L
H
L
×
H
×
n
/CS /RAS /CAS
L
×
×
×
L
×
×
×
H
×
×
×
H
L
L
L
L
L
L
L
H
L
H
H
H
H
×
×
L
L
H
H
L
H
×
×
H
H
×
×
H
L
H
H
LDQM
×
L
×
H
/WE Address
×
×
×
×
×
×
H
×
H
×
H
×
×
×
H
×
×
×
×
×
H
×
Preliminary Data Sheet E0250E10 (Ver. 1.0)
17