EDS1232AABB Datasheet, PDF (16/55 Pages) Elpida Memory – 128M bits SDRAM

EDS1232AABB, EDS1232AATA
Truth Table
Command Truth Table
CKE
Function
Symbol
n–1 n
Device deselect
DESL
H
×
No operation
NOP
H
×
Burst stop
BST
H
×
Read
Read with auto precharge
Write
READ
READA
WRIT
H
×
H
×
H
×
Write with auto precharge
Bank activate
Precharge select bank
Precharge all banks
WRITA
ACT
PRE
PALL
H
×
H
×
H
×
H
×
Mode register set
MRS
H
×
Remark: H: VIH. L: VIL. ×: VIH or VIL, V = Valid data
DQM Truth Table
Function
Data write / output enable
Data mask / output disable
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
DQ16 to DQ23 write inhibit/output disable
DQ24 to DQ31 write inhibit/output disable
Remark: H: VIH. L: VIL. ×: VIH or VIL
Symbol
ENB
MASK
ENB0
ENB1
ENB2
ENB3
MASK0
MASK 1
MASK 2
MASK 3
/CS
H
L
L
L
L
L
L
L
L
L
L
CKE
n–1
H
H
H
H
H
H
H
H
H
H
/RAS /CAS /WE
×
×
×
H
H
H
H
H
L
H
L
H
H
L
H
H
L
L
H
L
L
L
H
H
L
H
L
L
H
L
L
L
L
DQM
n
0
1
×
L
L
×
H
H
×
L
×
×
×
L
×
×
×
×
×
×
×
H
×
×
×
H
×
×
×
×
×
×
BA0,
BA1 A10
×
×
×
×
×
×
V
L
V
H
V
L
V
H
V
V
V
L
×
H
L
L
A9 - A0,
A11
×
×
×
V
V
V
V
V
×
×
V
2
3
L
L
H
H
×
×
×
×
L
×
×
L
×
×
×
×
H
×
×
H
Preliminary Data Sheet E0205E50 (Ver. 5.0)
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