R01UH0092EJ0110 Rev.1.10
Page 116 of 807
Jul 31, 2012
M16C/64C Group
9. Power Control
Table 9.2
Clocks in Normal Operating Mode
Notes:
1. Select by setting the CM06 bit in the CM0 register and bits CM17 to CM16 in the CM1 register.
2. The peripheral clock is enabled when each clock is supplied. Refer to 8. “Clock Generator” for the
clock supply method.
Table 9.3
Clock-Related Bit Setting and Modes
Mode CPU
Clock
Peripheral Clocks
f1
fC, fC32
fOCO-S
High-speed mode
Main clock
divided by 1
Main clock divided by 1
Enabled
Enabled
Medium-speed mode
Main clock
divided by n
PLL operating mode
PLL clock
divided by n
PLL clock divided by 1
125 kHz on-chip oscillator
mode
fOCO-S
divided by n
fOCO-S divided by 1
Enabled
Enabled
125 kHz on-chip oscillator
low power mode
fOCO-S
divided by n
fOCO-S divided by 1
Enabled
Enabled
Low-speed mode
fC
Any of the following:
Main clock divided by 1
(when the CM21 is 0 and the CM11 is 0)
PLL clock divided by 1
(when the CM21 is 0 and the CM11 is 1)
fOCO-S divided by 1
(when the CM21 is 1)
Enabled
Enabled
Low power mode
fC
fOCO-S divided by 1
(when the CM21 is 1)
Enabled
Enabled
CM11
: Bit in the CM1 register
CM21
: Bit in the CM2 register
Mode
CM2 Register
CM1 Register
CM0 Register
CM21
CM14 CM11 CM07 CM05
CM04
High-speed mode,
medium-speed mode
0
−
0
0
0
−
PLL operating mode
0
−
1
0
0
−
125 kHz on-chip oscillator mode
1
0
0
0
0
−
125 kHz on-chip oscillator low
power mode
1
0
0
0
1
−
Low-speed mode
−
−
0
1
0
1
Low power mode
−
−
0
1
1
1
−
: 0 or 1
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