EDS2532AABH-1AR2 Datasheet, PDF (13/48 Pages) Elpida Memory – 256M bits SDRAM

EDS2532AABH-1AR2
DQM Truth Table
CKE
DQM
Function
Symbol
n–1 n
0
1
2
3
Data write / output enable
ENB
H
×
L
L
L
L
Data mask / output disable
MASK
H
×
H
H
H
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
EDQ16 to DQ23 write inhibit/output disable
DQ24 to DQ31 write inhibit/output disable
Remark: H: VIH. L: VIL. ×: VIH or VIL
O^{Write: lDID is needed.}
Read: lDOD is needed.
L ^{CKE Truth Table}
ENB0
ENB1
ENB2
ENB3
MASK0
MASK 1
MASK 2
MASK 3
H
×
H
×
H
×
H
×
H
×
H
×
H
×
H
×
CKE
L
×
×
×
H
×
×
×
×
L
×
×
×
H
×
×
×
×
×
×
L
×
×
L
×
×
×
×
H
×
×
H
Current state
Function
Symbol n – 1 n
Activating
Clock suspend mode entry
H
L
Any
Clock suspend mode
L
L
Clock suspend Clock suspend mode exit
L
H
Idle
CBR (auto) refresh command REF
H
H
P Idle
Power down entry
H
L
H
L
Power down
Power down exit
L
H
L
H
roduct _{Remark: H: VIH. L: VIL. ×: VIH or VIL}
/CS /RAS /CAS /WE Address
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
L
L
L
H
×
L
H
H
H
×
H
×
×
×
×
H
×
×
×
×
L
H
H
H
×
Data Sheet E0517E20 (Ver. 2.0)
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