EDS2504ACTA View Datasheet(PDF) - Elpida Memory, Inc
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Description
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EDS2504ACTA Datasheet PDF : 51 Pages
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EDS2504ACTA/08ACTA/16ACTA, EDS2504APTA/08APTA/16APTA
Command Truth Table for CKE
CKE
Current State
n – 1 n /CS /RAS /CAS /WE Address Operation
Notes
Self refresh
H× × × × × ×
L H H× × × ×
INVALID, CLK (n – 1) would exit self refresh
Self refresh recovery
L H L HH× ×
Self refresh recovery
L H L HL × ×
ILLEGAL
LHLL×××
ILLEGAL
LL ×××××
Continue self refresh
Self refresh recovery H H H × × × ×
Idle after tRC
HH L HH× ×
Idle after tRC
HH L HL × ×
HH L L × × ×
ILLEGAL
ILLEGAL
HL H× × × ×
ILLEGAL
HL L HH× ×
ILLEGAL
HL L HL × ×
ILLEGAL
HL L L × × ×
ILLEGAL
Power down
H× × × × ×
L H H× × × ×
INVALID, CLK (n – 1) would exit power down
EXIT power down
L H L HHH×
EXIT power down
LL ×××××
Continue power down mode
All banks idle
HH H× × ×
Refer to operations in Function Truth Table
HH L H× ×
Refer to operations in Function Truth Table
HH L L H×
Refer to operations in Function Truth Table
HH L L L H×
CBR (auto) Refresh
H H L L L L OPCODE Refer to operations in Function Truth Table
HL H× × ×
Begin power down next cycle
HL L H× ×
Refer to operations in Function Truth Table
HL L L H×
Refer to operations in Function Truth Table
HL L L L H×
Self refresh
1
H L L L L L OPCODE Refer to operations in Function Truth Table
LH×××××
Exit power down next cycle
LL ×××××
Power down
1
Row active
H× × × × × ×
Refer to operations in Function Truth Table
L× ×××××
Clock suspend
1
Any state other than H H × × × ×
Refer to operations in Function Truth Table
listed above
HL × × × × ×
Begin clock suspend next cycle
2
LH×××××
Exit clock suspend next cycle
LL ×××××
Maintain clock suspend
Remark: H: VIH. L: VIL. ×: VIH or VIL
Notes: 1. Self refresh can be entered only from the all banks idle state. Power down can be entered only from all
banks idle. Clock suspend can be entered only from following states, row active, read, read with auto-
precharge, write and write with auto precharge.
2. Must be legal command as defined in Function Truth Table.
Data Sheet E0110E30 (Ver. 3.0)
21
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