M16C65 Datasheet, PDF (173/829 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
h.Entering 125 kHz on-chip oscillator mode from 125 kHz on-chip oscillator low power mode
Entering low-speed mode from low power mode
Follow both or either of the procedures below (in no particular order).
(1)Oscillate the main clock and wait until the oscillation stabilizes. See 8.3.1 “Main Clock”.
(2)Oscillate the 40 MHz on-chip oscillator and wait until the oscillation stabilizes. See 8.3.4
“fOCO-F”.
i.Entering 125 kHz on-chip oscillator mode from 40 MHz on-chip oscillator mode
(1)Oscillate the 125 kHz on-chip oscillator and wait until the oscillation stabilizes. See 8.3.5 “125
kHz On-Chip Oscillator Clock (fOCO-S)”.
(2)Set the CM06 bit to 1 (divide-by-8 mode).
(3)Set the FRA01 bit to 0 (125 kHz on-chip oscillator).
(4)Set the CM21 bit to 1 (on-chip oscillator clock selected as CPU clock source).
(5)Set the CM07 bit to 0 (main clock, PLL clock, or on-chip oscillator clock selected as CPU clock
source).
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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