CHAPTER 16 STANDBY FUNCTION
User’s Manual U13045EJ2V0UM00
225
(2) Releasing STOP mode
The STOP mode can be released by the following two types of sources:
(a) Releasing by unmasked interrupt request
The STOP mode can be released by an unmasked interrupt request. In this case, if the interrupt is able
to be acknowledged, vectored interrupt processing is performed, after the oscillation stabilization time
has elapsed. If the interrupt is disabled, the instruction at the next address is executed.
Caution Be sure to use a vectored interrupt when releasing the STOP mode in the
µ
PD78F9116
and 78F9136. A runaway may be generated in the microcontroller if the STOP mode is
released by any other method.
Figure 16-4. Releasing STOP Mode by Interrupt
Note
OSTS is not provided in the
µ
PD789124 and 789134 Subseries, and the wait time is fixed to 2
7
/
f
CC
.
Remark
The broken lines indicate the case where the interrupt request that has released the standby
mode is acknowledged.
STOP
instruction
Standby
release signal
Wait
Note
(set time by OSTS)
STOP mode
Operating
mode
Oscillation stabilization
wait status
Clock
Operating
mode
Oscillation
stop
Oscillation
Oscillation
Summary of Contents for mPD789101
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