Releasing Stop Mode By Interrupt - NEC PD789860 User Manual

(2) Releasing STOP mode
STOP mode can be released by the following three sources:
(a) Releasing by unmasked interrupt request
STOP mode is released by an unmasked interrupt request. In this case, vectored interrupt servicing is
performed if interrupt acknowledgment is enabled after the oscillation stabilization time has elapsed. If
interrupt acknowledgment is disabled, the instruction at the next address is executed.
Standby
release signal
Clock
Note There is no OSTS in the
Remark The broken lines indicate the case where the interrupt request that has released standby
mode is acknowledged.
(b) Releasing by non-maskable interrupt request of key return
STOP mode is released regardless of whether interrupts are enabled or disabled, and vectored interrupt
servicing is performed.
154
CHAPTER 15 STANDBY FUNCTION
Figure 15-4. Releasing STOP Mode by Interrupt
STOP
instruction
Operating
STOP mode
mode
Oscillation
Oscillation stop
µ
PD789861 Subseries, and the wait is fixed at 2
User's Manual U14826EJ5V0UD
Note
Wait
(time set by OSTS)
Oscillation stabilization
wait status
Oscillation
7
/f
Operating
mode
.
CC