A43L8316 datasheet(21/45 Pages) AMICC

21 / 45 page

A43L8316

Preliminary (April, 2000, Version 1.0)

AMIC Technology, Inc.

10. Clock Suspend Exit & Power Down Exit

11. Auto Refresh & Self Refresh

* Note : 1. Active power down : one or more bank active state.

2. Precharge power down : both bank precharge state.

3. The auto refresh is the same as CBR refresh of conventional DRAM.

No precharge commands are required after Auto Refresh command.

During tRC from auto refresh command, any other command can not be accepted.

4. Before executing auto/self refresh command, both banks must be idle state.

5. MRS, Bank Active, Auto/Self Refresh, Power Down Mode Entry.

6. During self refresh mode, refresh interval and refresh operation are performed internally.

After self refresh entry, self refresh mode is kept while CKE is LOW.

During self refresh mode, all inputs expect CKE will be don’t cared, and outputs will be in Hi-Z state.

During tRC from self refresh exit command, any other command can not be accepted.

Before/After self refresh mode, burst auto refresh cycle (1024K cycles ) is recommended.

2) Power Down (=Precharge Power Down) Exit

Note 1

CLK

CMD

1) Clock Suspend (=Active Power Down) Exit

tSS

CKE

Internal

CLK

Note 2

CLK

CMD

ACT

CKE

Internal

CLK

tSS

NOP

2) Self Refresh

CLK

CMD

1) Auto Refresh

CKE

Internal

CLK

CMD

CKE

PRE

Note 4

PRE

CMD

Note 5

tRP

tRC

Note 3

Note 6

CMD

Note 4

tRP

tRC

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