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CHAPTER 23 STANDBY FUNCTION
STOP
Instruction
Wait
(Time set by OSTS)
Oscillation Stabilization
Wait Status
Operating
Mode
Oscillation
Operationg
Mode STOP Mode
Oscillation StopOscillation
Standby
Release Signal
Clock
Interrupt
Request
(2) STOP mode release
The STOP mode can be cleared with the following three types of sources.
(a) Release by unmasked interrupt request
The STOP mode is cleared upon generation of an unmasked interrupt request. If interrupt acknowledge
is enabled, vectored interrupt servicing is performed after the lapse of the oscillation stabilization time.
If interrupt acknowledge is disabled, the next address instruction is executed.
Figure 23-4. STOP Mode Release by Interrupt Request Generation
Remark The broken line indicates the case when the interrupt request which has cleared the standby
status is acknowledged.
(b) Release by unmasked test input
The STOP mode is cleared by unmasked test input. After the lapse of the oscillation stabilization time,
the instruction at the next address after the STOP instruction is executed.