CHAPTER 15 STANDBY FUNCTIONUser’s Manual U14826EJ5V0UD154(2) Releasing STOP modeSTOP mode can be released by the following three sources:(a) Releasing by unmasked interrupt requestSTOP mode is released by an unmasked interrupt request. In this case, vectored interrupt servicing isperformed if interrupt acknowledgment is enabled after the oscillation stabilization time has elapsed. Ifinterrupt acknowledgment is disabled, the instruction at the next address is executed.Figure 15-4. Releasing STOP Mode by InterruptSTOPinstructionStandbyrelease signalWaitNote(time set by OSTS)STOP modeOperatingmodeOscillation stabilizationwait statusClockOperatingmodeOscillationstop OscillationOscillationNote There is no OSTS in theμPD789861 Subseries, and the wait is fixed at 27 /f CC.Remark The broken lines indicate the case where the interrupt request that has released standbymode is acknowledged.(b) Releasing by non-maskable interrupt request of key returnSTOP mode is released regardless of whether interrupts are enabled or disabled, and vectored interruptservicing is performed.
