EDD1232ACBH ELPIDA [Elpida Memory], EDD1232ACBH Datasheet - Page 19

• Manufacturer Part Number: EDD1232ACBH
• Description: 128M bits DDR SDRAM
• Manufacturer: ELPIDA [Elpida Memory]

Command Truth Table for CKE
Remark: H: VIH. L: VIL. : VIH or VIL
Note: Self refresh can be entered only from the all banks idle state. Power down can be entered only from all
Current State
Self refresh
Self refresh recovery
Power down
All banks idle
Row active
Data Sheet E1202E20 (Ver.2.0)
banks idle or row active state.
CKE
n – 1 n
H
L
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
L
H
H
H
H
H
H
H
H
H
H
L
H
L
H
H
H
H
L
H
H
H
H
L
L
L
L
H
H
L
H
H
H
H
H
L
L
L
L
L
/CS
H
L
L
L
H
L
L
L
H
L
L
L
H
L
H
L
L
L
L
H
L
L
L
L
/RAS /CAS /WE Address
H
H
L
H
H
L
H
H
L
H
H
L
L
L
H
L
L
L
H
L
H
L
H
L
H
H
L
L
H
L
L
H
H
L
H
L
OPCODE Refer to operations in Function Truth Table
OPCODE Refer to operations in Function Truth Table
19
Operation
INVALID, CK (n-1) would exit self refresh
Self refresh recovery
Self refresh recovery
ILLEGAL
ILLEGAL
Maintain self refresh
Idle after tRC
Idle after tRC
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
INVALID, CK (n – 1) would exit power down
EXIT power down
Maintain power down mode
Refer to operations in Function Truth Table
Refer to operations in Function Truth Table
Refer to operations in Function Truth Table
CBR (auto) refresh
Refer to operations in Function Truth Table
Refer to operations in Function Truth Table
Refer to operations in Function Truth Table
Self refresh
Power down
Refer to operations in Function Truth Table
Power down
Idle
EDD1232ACBH
Notes
1
1
1