M16C/62P Group (M16C/62P, M16C/62PT)
22. Flash Memory Version
Rev.2.41
Jan 10, 2006
Page 283 of 390
REJ09B0185-0241
Figure 22.9
Processing Before and After Low Power Dissipation Mode or On-chip Oscillator Low-
Power Consumption Mode
Start main
clock
oscillation
Transfer the low-power consumption mode or
on-chip oscillator low-power consumption mode
program to a space other than the flash memory
Switch clock source of the CPU clock.
The main clock stops.
(2)
Wait until the flash memory stabilizes (tps
µ
s)
(3)
Set the FMSTP bit to “0” (flash memory operation)
Set the FMSTP bit to “1” (The flash memory stops
operating. It is in a low-power consumption state)
(1)
Process in low-power consumption mode or
on-chip oscillator low-power consumption mode
(4)
Switch clock
source of the
CPU clock
(2)
Low-power consumption mode or
on-chip oscillator low-power
consumption mode program
Set the FMR01 bit to “0”
(CPU rewrite mode disabled)
Set the FMR01 bit to “1” after setting it to “0”
(CPU rewrite mode enabled)
Jump to a desired address in the flash memory
Wait until
oscillation
stabilizes
NOTES:
1. Set the FMSTP bit to “1” after the FMR01 bit is set to “1”
(CPU rewrite mode enabled).
2. Wait until clock stabilizes to switch clock source of
the CPU clock to the main clock or sub clock.
3. Add tps
µ
s wait time by program. Do not access the
flash memory during this wait time.
4. Before entering wait mode or stop mode, be sure
to set the FMR01 bit to “0”.
Jump to the low-power consumption mode or
on-chip oscillator low-power consumption mode
program transferred to a space other than the
flash memory. (In the following steps, use the
low-power consumption mode or on-chip oscillator
low-power consumption mode program in a space
other than the flash memory.)
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