Renesas M16C FAMILY series Hardware Manual page 331

M 1 6 C 2 / 8 G o r u p ( M 1 6 C
Transfer a low power internal consumption mode
Jump to the low power consumption mode
program transferred to internal RAM area.
(In the following steps, use the low-power
consumption mode program or internal RAM area)
NOTES:
1. Set the FMRSTP bit to "1" after setting the FMR01 bit to "1"(CPU rewrite mode).
2. Wait until the clock stabilizes to switch the clock source of the CPU clock to the main clock or the sub clock.
3. Add a tps wait time by a program. Do not access the flash memory during this wait time.
Figure 18.11 Processing Before and After Low Power Dissipation Mode
R e . v 2 0 . 0 J a . n 3 , 1 2 0 0 7
R E J 0 9 B 0 0 4 7 0 - 2 0 0
2 / , 8 M 1 6 C 2 / 8 ) B
program to RAM area
page 311
f o 3 8 5
Low power consumption
mode program
Set the FMR01 bit to "1" after setting "0"
(CPU rewrite mode enabled)
Set the FMSTP bit to "1" (flash memory stopped.
Low power consumption state)
Switch the clock source of CPU clock.
(2)
Turn main clock off.
Process of low power consumption mode or
on-chip oscillator low power consumption mode
Start main clock
wait until oscillation stabilizes
oscillation
switch the clock source of the CPU clock
Set the FMSTP bit to "0" (flash memory operation)
Set the FMR01 bit to "0"
(CPU rewrite mode disabled)
Wait until the flash memory circuit stabilizes ( tps)
Jump to a desired address in the flash memory
18. Flash Memory Version
(2)
(1)
(2)
(3)