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IBM uPD78082 User Manual

Page 222

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CHAPTER 13 STANDBY FUNCTION

STOP
Instruction

Wait

(Time set by OSTS)

Oscillation Stabilization

Wait Status

Operating
Mode

Oscillation

Operationg
Mode

STOP Mode

Oscillation Stop

Oscillation

Standby
Release Signal

Clock

(2) STOP mode release

The STOP mode can be cleared with the following two types of sources.

(a) Release by unmasked interrupt request

An unmasked interrupt request is used to release the STOP mode. If interrupt acknowledge is enabled

after the lapse of oscillation stabilization time, vectored interrupt service is carried out. If interrupt

acknowledge is disabled, the next address instruction is executed.

Figure 13-4. STOP Mode Release by Interrupt Generation

Remark

The broken line indicates the case when the interrupt request which has cleared the standby

status is acknowledged.

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