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EDS1232ECBH-9ATT Datasheet(PDF) 14 Page - Elpida Memory

Part # EDS1232ECBH-9ATT
Description  128M bits SDRAM 128M bits SDRAM
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

EDS1232ECBH-9ATT Datasheet(HTML) 14 Page - Elpida Memory

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EDS1232ECBH-9ATT
Preliminary Data Sheet E0878E10 (Ver. 1.0)
14
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
ENB0
H
×
L
×
×
×
DQ8 to DQ15 write enable/output enable
ENB1
H
×
×
L
×
×
DQ16 to DQ23 write enable/output enable
ENB2
H
×
×
×
L
×
DQ24 to DQ31 write enable/output enable
ENB3
H
×
×
×
×
L
DQ0 to DQ7 write inhibit/output disable
MASK0
H
×
H
×
×
×
DQ8 to DQ15 write inhibit/output disable
MASK 1
H
×
×
H
×
×
DQ16 to DQ23 write inhibit/output disable
MASK 2
H
×
×
×
H
×
DQ24 to DQ31 write inhibit/output disable
MASK 3
H
×
×
×
×
H
Remark: H: VIH. L: VIL.
×: VIH or VIL
Write: lDID is needed.
Read: lDOD is needed.
CKE Truth Table
CKE
Current state
Function
Symbol
n – 1
n
/CS
/RAS
/CAS
/WE
Address
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
L
L
L
H
×
Idle
Self refresh entry
SELF
H
L
L
L
L
H
×
Self refresh
Self refresh exit
L
H
L
H
H
H
×
L
H
H
×
×
×
×
Idle
Power down entry
H
L
L
H
H
H
×
H
L
H
×
×
×
×
Power down
Power down exit
L
H
H
×
×
×
×
L
H
L
H
H
H
×
Remark: H: VIH. L: VIL.
×: VIH or VIL


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