m52s128168a Elite Semiconductor Memory Technology Inc., m52s128168a Datasheet - Page 42
m52s128168a
Manufacturer Part Number
m52s128168a
Description
2m X 16 Bit X 4 Banks Synchronous Dram
Manufacturer
Elite Semiconductor Memory Technology Inc.
Datasheet
1.M52S128168A.pdf
(47 pages)
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ESMT
Self Refresh Entry & Exit Cycle
* Note : TO ENTER SELF REFRESH MODE
Elite Semiconductor Memory Technology Inc.
1. CS , RAS & CAS with CKE should be low at the same clock cycle.
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”.
TO EXIT SELF REFRESH MODE
4. System clock restart and be stable before returning CKE high.
5. CS starts from high.
6. Minimum t
7. 4K cycles of burst auto refresh is required immediately before self refresh entry and immediately after self refresh exit.
cf.) Once the device enters self refresh mode, minimum t
RFC
is required after CKE going high to complete self refresh exit.
RAS
is required before exit from self refresh.
Publication Date: Dec. 2008
Revision: 1.2
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