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3.13 Low-power Consumption
After the register is saved, an interrupt vector is imported and executed by the interrupt
processing routine.
If the interrupt level is prohibited by the I flag in the ILM register of the CPU
After the register is saved, an interrupt vector is imported and executed by the processing
starts from the instruction after the instruction that set the stop status.
r Return using the RSTX pin
The return procedure from the stop status to the ordinary operation status is as follows:
Low-level signal application to RSTX pin ==> Internal reset ==> Restart of oscillation circuit ==>
Wait for stabilization ==> Restart of internal peripheral clock supply ==> Restart of internal DMA
clock supply ==> Restart of internal bus clock supply ==> Restart of internal CPU clock supply
==> Import of reset vector ==> Restart of execution from reset entry address
Precaution:
If the HSTX pin is on the low level in the stop status, the CPU is not reset until the HSTX pin
is cleared to the high level.
r Return using the HSTX pin
The return procedure from the stop status to the ordinary operation status is as follows:
High-level signal application to HSTX pin ==> Internal reset ==> Restart of oscillation circuit ==>
Wait for stabilization ==> Restart of internal peripheral clock supply ==> Restart of internal DMA
clock supply ==> Restart of internal bus clock supply ==> Restart of internal CPU clock supply
==> Import of reset vector ==> Restart of execution from reset entry address
Precautions:
If an interrupt request has already been issued from a peripheral, the CPU does not change
to the stop status but ignores write access.
No internal clocks are supplied during the oscillation stabilization wait time except after
power-on reset. After power-on reset, however, all internal clocks are supplied to initialize
the internal status.
If the HSTX pin is set to the low level in the stop status, the stop status is immediately
cleared and the system waits for oscillation to stabilize. If the HSTX pin is on the low level
after the time for the system to wait for oscillation to stabilize has passed, the CPU is
immediately set to the stop status.