Renesas M16C/64A Series User Manual page 157

M16C/64A Group
9.3.4.3 Exiting Stop Mode
Use a reset or an interrupt to exit stop mode. Table 9.8 lists Resets and Interrupts to Exit Stop Mode
and Conditions for Use.
Table 9.8 Resets and Interrupts to Exit Stop Mode and Conditions for Use
Interrupt, Reset
INT
Key input
Timer A, timer B
Peripheral
Serial interface
function
interrupt
Multi-master I
interface
Voltage monitor 1 interrupt
Voltage monitor 2 interrupt
NMI
Hardware reset
Voltage monitor 0 reset
To exit stop mode by using hardware reset, voltage monitor 0 reset, NMI interrupt, voltage monitor 1
interrupt, or voltage monitor 2 interrupt, set bits ILVL2 to ILVL0 in the interrupt control registers for the
peripheral function interrupt to 000b (interrupt disabled) before setting the CM10 bit to 1.
When the MCU exits stop mode by using an interrupt, an interrupt request is generated, the CPU
clock starts running, and interrupt routine is performed.
When exiting stop mode by means of an interrupt, the CPU clock source varies depending on the
CPU clock source setting before the MCU had entered stop mode. Table 9.9 lists CPU Clock After
Exiting Stop Mode.
Table 9.9 CPU Clock After Exiting Stop Mode
CPU Clock Before Entering Stop Mode
Main clock divided by 1 (no division), 2, 4, 8 or 16
fOCO-S divided by 1 (no division), 2, 4, 8 or 16
fC
R01UH0136EJ0210 Rev.2.10
Jul 31, 2012
Usable
Usable
Usable when counting external signals in event counter mode
Usable when an external clock is selected
2
C-bus
SCL/SDA interrupt is usable
Usable when the digital filter is disabled (VW1C1 bit in the VW1C
register is 1)
Usable when the digital filter is disabled (VW2C1 bit in the VW2C
register is 1)
Usable when the digital filter is disabled (bits NMIDF2 to NMIDF0
in the NMIDF register are 000b)
Usable
Usable
Main clock divided by 8
fOCO-S divided by 8
fC
Conditions for Use
CPU Clock After Exiting Stop Mode
9. Power Control
Page 124 of 800