A43L8316 datasheet(43/45 Pages) AMICC

43 / 45 page

A43L8316

Preliminary (April, 2000, Version 1.0)

AMIC Technology, Inc.

Function Truth Table for CKE (Table 2)

Current

State

CKE

n-1

CKE

RAS CAS

Address

Action

Note

INVALID

Exit Self Refresh

→ABI after tRC

Exit Self Refresh

→ABI after tRC

ILLEGAL

Self

Refresh

NOP(Maintain Self Refresh)

INVALID

Exit Power Down

→ABI

Exit Power Down

→ABI

ILLEGAL

Both

Bank

Precharge

Power

Down

NOP(Maintain Power Down Mode)

Refer to Table 1

Enter Power Down

ILLEGAL

Enter Self Refresh

ILLEGAL

All

Banks

Idle

NOP

Refer to Operations in Table 1

Begin Clock Suspend next cycle

Exit Clock Suspend next cycle

Any State

Other than

Listed

Above

Maintain clock Suspend

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.

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