NEC mPD780852 Series, Preliminary User'S Manual

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CHAPTER 20 STANDBY FUNCTION
Preliminary User’s Manual U14581EJ3V0UM00
(2) STOP mode clear
The STOP mode can be cleared with the following two types of sources.
(a) Clear upon unmasked interrupt request
An unmasked interrupt request is used to clear 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 20-4. STOP Mode Clear upon Interrupt Generation
STOP instruction
Wait
(Time set by OSTS)
Oscillation stabilization
wait status
Operation mode STOP mode Operation mode
Oscillation
Clock
Standby release
signal
Oscillation stop Oscillation
Remark The broken line indicates the case when the interrupt request which has cleared the standby
mode is acknowledged.