A43L4616 AMIC Technology, Corp., A43L4616 Datasheet - Page 39

• Manufacturer Part Number: A43L4616
• Description: 4M x 16 Bit x 4 Banks Synchronous DRAM
• Manufacturer: AMIC Technology, Corp.

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
(September, 2004, Version 0.0)
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
H
H
H
n
X
H
H
H
H
X
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
CS
X
H
X
X
H
X
X
H
X
X
X
X
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
RAS CAS
X
X
H
H
H
X
X
X
H
H
H
X
X
X
H
H
H
X
X
X
X
X
L
L
L
L
L
X
X
H
H
X
X
X
X
H
H
X
X
X
X
H
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
OPCODE MRS
38
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
INVALID
Exit Power Down → ABI
Exit Power Down → ABI
ILLEGAL
ILLEGAL
ILLEGAL
Enter Power Down
Enter Power Down
ILLEGAL
ILLEGAL
Row (& Bank ) Active
Enter Self Refresh
NOP
Maintain clock Suspend
NOP(Maintain Self Refresh)
NOP(Maintain Power Down Mode)
Refer to Table 1
Refer to Operations in Table 1
Begin Clock Suspend next cycle
Exit Clock Suspend next cycle
RC
(min) has to be elapse before issuing a
Action
AMIC Technology, Corp.
RC
RC
A43L4616
Note
6
6
7
7
8
8
8
9
9