Releasing Stop Mode By Interrupt - NEC switch User Manual

(2) Releasing STOP mode
The STOP mode can be released by the following two sources.
(a) Releasing by unmasked interrupt request
The STOP mode can be released by an unmasked interrupt request. In this case, if interrupts are enabled
to be acknowledged, vectored interrupt servicing is performed, after the oscillation stabilization time has
elapsed. If interrupt acknowledgement is disabled, the instruction at the next address is executed.
Standby
release signal
Operation
Oscillation
Clock
Remark The broken lines indicate the case where the interrupt request that has released the standby
mode is acknowledged.
184
CHAPTER 12 STANDBY FUNCTION
Figure 12-4. Releasing STOP Mode by Interrupt
STOP
instruction
STOP mode
mode
Oscillation
stops
User's Manual U12978EJ3V0UD
Wait
( set time by OSTS)
Oscillation stabilization
Operation
wait status
Oscillation
mode