
REJ05B1160-0101 Rev.1.01 February 2010 Page 11 of 43
M16C/62P Group, R32C/111 Group
Differences between M16C/62P and R32C/111 (100 pin ver.)
4.3 Voltage Regulator
The internal voltage of the M16C/62P is generated by reducing the input voltage from the VCC1 pin with
the voltage regulator(s). To stabilize the internal voltage, a decoupling capacitor should be connected
between pins VDC1 and BDC0. The M16C/62P does not require any decoupling capacitor. Table 4.10
lists the change on the voltage regulator control register.
4.4 Low Voltage Detection
Table 4.11 lists the changes on SFRs associated with low voltage detection.
Table 4.8 Comparison Chart: Clock Source and Divide Ratio After a Reset
Item M16C/62P R32C/111
Clock source Main clock PLL self oscillation mode
CPU clock Divide-by-8 Divide-by-12
Peripheral bus clock Divide-by-8 Divide-by-12
Other clocks N/A • Base clock: divide-by-6
• CPU clock: base clock divide-by-2
• Peripheral bus clock: base clock divide-by-2
Table 4.9 Comparison Chart: Clock Source Before a Software Reset
Item M16C/62P R32C/111
Clock source Main clock PLL clock
Table 4.10 Comparison Chart: Voltage Regulator Control Register
Symbol
Address
Bit M16C/62P R32C/111
M16C/62P R32C/111
VRCR N/A 40060h - N/A Available only in the R32C/111
Table 4.11 Comparison Chart: Low Voltage Detection-associated SFRs
Symbol
Address
Bits M16C/62P R32C/111
M16C/62P R32C/111
VCR1 0019h N/A - Available only in the M16C/62P N/A
VCR2 001Ah N/A - Available only in the M16C/62P N/A
D4INT 001Fh N/A - Available only in the M16C/62P N/A
WDC 000Fh 4404Fh 5 Coldstart/warmstart
determination flag
Reserved
LVDC N/A 40062h - N/A Available only in the R32C/111
DVCR N/A 40064h - N/A Available only in the R32C/111
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