A43E06161 Datasheet, PDF (44/46 Pages) AMIC Technology – 512K X 16 Bit X 2 Banks Synchronous DRAM

A43E06161
Function Truth Table for CKE (Table 2)
Current
State
Self
Refresh
Both
Bank
Precharge
Power
Down
All
Banks
Idle
Any State
Other than
Listed
Above
CKE CKE
n-1 n
CS
RAS CAS
WE ^Address
H
X
X
X
X
X
X INVALID
Action
L
H
H
X
X
X
X Exit Self Refresh→ABI after tRC
L
H
L
H
H
H
X Exit Self Refresh→ABI after tRC
L
H
L
H
H
L
X ILLEGAL
L
H
L
H
L
X
X ILLEGAL
L
H
L
L
X
X
X ILLEGAL
L
L
X
X
X
X
X NOP(Maintain Self Refresh)
H
X
X
X
X
X
X INVALID
L
H
H
X
X
X
X Exit Power Down→ABI
L
H
L
H
H
H
X Exit Power Down→ABI
L
H
L
H
H
L
X ILLEGAL
L
H
L
H
L
X
X ILLEGAL
L
H
L
L
X
X
X ILLEGAL
L
L
X
X
X
X
X NOP(Maintain Power Down Mode)
H
H
X
X
X
X
X Refer to Table 1
H
L
H
X
X
X
X Enter Power Down
H
L
L
H
H
H
X Enter Power Down
H
L
L
H
H
L
X ILLEGAL
H
L
L
H
L
X
X ILLEGAL
H
L
L
L
H
X
X ILLEGAL
H
L
L
L
L
H
X Enter Self Refresh
H
L
L
L
L
L
X ILLEGAL
L
L
X
X
X
X
X NOP
H
H
X
X
X
X
X Refer to Operations in Table 1
H
L
X
X
X
X
X Begin Clock Suspend next cycle
L
H
X
X
X
X
X Exit Clock Suspend next cycle
L
L
X
X
X
X
X Maintain clock Suspend
Note
6
6
7
7
8
8
8
9
9
Abbreviations : ABI = All Banks Idle
Note: 6. After CKE’s low to high transition to exit self refresh mode. And a time of tRC(min) has to be elapse after CKE’s low to
high transition to issue a new command.
7. CKE low to high transition is asynchronous as if restarts internal clock.
A minimum setup time “tSS + one clock” must be satisfied before any command other than exit.
8. Power-down and self refresh can be entered only from the all banks idle state.
9. Must be a legal command.
PRELIMINARY (July, 2005, Version 0.1)
43
AMIC Technology, Corp.