M16C26A Datasheet, PDF (261/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/26A Group (M16C/26A, M16C/26B, M16C/26T)
17. Flash Memory Version
Transfer a low power internal consumption mode
program to RAM area
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)
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)⁽¹⁾
Switch the clock source of CPU clock.
Turn main clock off. ⁽²⁾
Process of low power consumption mode or
on-chip oscillator low power consumption mode
Start main clock oscillation wait until oscillation stabilizes
switch the clock source of the CPU clock ⁽²⁾
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)⁽³⁾
Jump to a desired address in the flash memory
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 17.5.1.3. Processing Before and After Low Power Dissipation Mode
Rev. 2.00 Feb.15, 2007 page 244 of 329
REJ09B0202-0200