A43E26161 AMIC Technology Corporation, A43E26161 Datasheet - Page 41

• Manufacturer Part Number: A43E26161
• Description: 1m X 16 Bit X 4 Banks Low Power Synchronous Dram
• Manufacturer: AMIC Technology Corporation

Function Truth Table for CKE (Table 2)
Abbreviations : ABI = All Banks Idle
Note: 6. After CKE’s low to high transition to exit self refresh mode, a minimum of t
(July, 2008, Version 1.7)
Other than
Precharge
Any State
Current
Refresh
Power
Banks
Above
Listed
Down
Bank
State
Both
Self
Idle
7. CKE low to high transition is asynchronous as if it restarts internal clock.
8. Power-down and self refresh can be entered only when all the banks are in idle state.
9. Must be a legal command.
All
new command.
A minimum setup time “tSS + one clock” must be satisfied before any command can be issued other than exit.
CKE
n-1
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
CKE
X
H
H
H
H
H
X
H
H
H
H
H
H
H
H
n
L
L
L
L
L
L
L
L
L
L
L
L
CS
H
H
H
X
L
L
L
L
X
X
L
L
L
L
X
X
L
L
L
L
L
L
X
X
X
X
X
RAS CAS
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
H
H
X
X
X
X
X
L
L
L
L
L
WE
X
X
H
X
X
X
X
X
H
X
X
X
X
X
H
X
H
H
X
X
X
X
X
L
L
L
L
40
OPCODE MRS
Address
RA
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
INVALID
Exit Self Refresh → ABI after t
Exit Self Refresh → ABI after t
ILLEGAL
ILLEGAL
ILLEGAL
NOP(Maintain Self Refresh)
INVALID
Exit Power Down → ABI
Exit Power Down → ABI
ILLEGAL
ILLEGAL
ILLEGAL
NOP(Maintain Power Down Mode)
Refer to Table 1
Enter Power Down
Enter Power Down
ILLEGAL
ILLEGAL
Row (& Bank ) Active
Enter Self Refresh
NOP
Refer to Operations in Table 1
Begin Clock Suspend next cycle
Exit Clock Suspend next cycle
Maintain clock Suspend
RC
(min) has to be elapse before issuing a
AMIC Technology, Corp.
Action
RC
RC
A43E26161
Note
6
6
7
7
8
8
8
9
9