A43L0616B AMIC Technology, Corp., A43L0616B Datasheet - Page 39

• Manufacturer Part Number: A43L0616B
• Description: 512K x 16-Bit x 2 Banks Synchronous DRAM
• Manufacturer: AMIC Technology, Corp.

CLOCK
A10/AP
ADDR
Self Refresh Entry & Exit Cycle
PRELIMINARY
CKE
RAS
CAS
DQM
CS
DQ
WE
BA
0
* Note 7
* Note : TO ENTER SELF REFRESH MODE
Self Refresh Entry
t
1
SS
* Note 1
TO EXIT SELF REFRESH MODE
1.
2. After 1 clock cycle, all the inputs including the system clock can be don’t care except for CKE.
3. The device remains in self refresh mode as long as CKE stays “Low”.
4. System clock restart and be stable before returning CKE high.
5.
6. Minimum tRC is required after CKE going high to complete self refresh exit.
7. 2K cycle of burst auto refresh is required before self refresh entry and after self refresh exit.
(May, 2005, Version 0.0)
2
If the system uses burst refresh.
(cf.) Once the device enters self refresh mode, minimum tRAS is required before exit from self refresh.
CS , RAS & CAS with CKE should be low at the same clock cycle.
CS starts from high.
* Note 2
Hi-Z
3
4
5
6
* Note 3
7
8
9
38
Hi-Z
10
* Note 4
Self Refresh Exit
11
* Note 5
t
12
SS
13
t
RC min.
14
* Note 6
AMIC Technology, Corp.
15
Auto Refresh
* Note 7
16
17
A43L0616B
18
: Don't care
19