M16C65 Datasheet, PDF (179/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
9. Power Control
9.3.4.3 Exiting Stop Mode
Use a reset or an interrupt to exit stop mode. Table 9.9 lists Resets and Interrupts to Exit Stop Mode
and Conditions for Use.
Table 9.9 Resets and Interrupts to Exit Stop Mode and Conditions for Use
Interrupt, Reset
Conditions for Use
Interrupt
Peripheral
function
interrupt
INT
Key input
timer A,
timer B
Usable
Usable
Usable when counting external signals in event counter mode
Serial
interface
Usable when an external clock is selected
Multi-master
I²C-bus
interface
SCL/SDA is usable
Voltage detection 1 interrupt, Usable when the digital filter is disabled (VW1C1 bit in the VW1C
register is 1)
Voltage detection 2 interrupt Usable when the digital filter is disabled (VW2C1 bit in the VW2C
register is 1)
NMI
Usable when the digital filter is disabled (bits NMIDF2 to NMIDF0
in the NMIDF register are 000b)
Reset Hardware reset
Usable
Voltage detection 0 reset
Usable when the digital filter is disabled (VW0C1 bit in the VW0C
register is 1)
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.
To use a peripheral function interrupt to exit stop mode, set the CM10 bit to 1 after the following
settings are completed.
(1) Set the interrupt priority level of bits ILVL2 to ILVL0 in the interrupt control register for peripheral
function interrupts which are used to exit stop mode.
Set bits ILVL2 to ILVL0 in all other interrupt control registers, for peripheral function interrupts not
used to exit stop mode, to 000b (interrupt disabled).
(2) Set the I flag to 1.
(3) Start operating the peripheral functions used to exit stop mode.
When exiting stop mode by means of a peripheral function interrupt, an interrupt routine is performed
after an interrupt request is generated and then the CPU clock is supplied again.
When stop mode is exited 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 9.10 lists CPU Clock After
Exiting Stop Mode.
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 144 of 791