EDD2516KCTA-6BS-E ELPIDA [Elpida Memory], EDD2516KCTA-6BS-E Datasheet - Page 19

• Manufacturer Part Number: EDD2516KCTA-6BS-E
• Description: 256M bits DDR SDRAM with Super Self-Refresh
• Manufacturer: ELPIDA [Elpida Memory]

Command Truth Table for CKE
Remark: H: VIH. L: VIL. ×: VIH or VIL
Preliminary Data Sheet E0641E20 (Ver.2.0)
Current State
Super self-refresh
Entering super self*
refresh
Exiting super self*
refresh
Power down
All banks idle
Row active
3
2
CKE
n – 1 n
H
L
L
L
L
L
H
L
L
L
L
L
H
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
H
H
L
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
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
L
H
L
×
H
H
L
×
×
H
×
×
H
L
L
L
×
H
L
L
L
×
×
×
×
×
H
L
×
×
×
×
H
L
×
×
×
H
L
L
×
×
H
L
×
×
×
H
×
×
×
H
L
L
×
×
H
L
L
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
H
×
×
×
×
×
×
×
×
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 super self-refresh
Exit super self-refresh
Exit super self-refresh
ILLEGAL
ILLEGAL
Maintain super self-refresh
INVALID, CK (n-1) would exit super self-refresh
Exit super self-refresh
Exit super self-refresh
ILLEGAL
ILLEGAL
Continue super self-refresh entry
(super self-refresh after tSSRENT)
Idle after tFHSSR
Idle after tFHSSR
Super self-refresh entry
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
INVALID, CK (n – 1) would exit power down
EXIT power down → Idle
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
Super self-refresh
Power down
Refer to operations in Function Truth Table
Power down
EDD2516KCTA
Notes
1
1
1