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(2) STOP mode clear
The STOP mode can be cleared with the following three types of sources.
(a) Clear upon unmasked interrupt request
(b) Clear upon unmasked test input
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The STOP mode is cleared when the unmasked interrupt request is generated. If interrupt request
acknowledge is enabled after the lapse of oscillation stabilization time, vectored interrupt service is carried
out. If interrupt request acknowledge is disabled, the next address instruction is executed.
Figure 20-4. STOP Mode Clear upon Interrupt Request Generation
STOP
Instruction
Standby
Release Signal
Operating
Mode
Oscillation
Clock
Remark
The broken line indicates the case when the interrupt request which has cleared the standby
status is acknowledged.
The STOP mode is cleared when the unmasked test signal inputs.
After the lapse of oscillation stabilization time, the instruction at the next address of the STOP instruction
is executed.
CHAPTER 20 STANDBY FUNCTION
Interrupt
Request
Oscillation Stabilization
STOP Mode
Oscillation Stop
Wait
(Time set by OSTS)
Operating
Wait Status
Mode
Oscillation
489
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