Voltage Detection Circuit - Renesas M16C FAMILY Hardware Manual

Under development
Preliminary specification
Specifications in this manual are tentative and subject to change.
R8C/11 Group

5.4 Voltage Detection Circuit

The voltage detection circuit has a circuit to monitor the input voltage at the V
the program, the hardware reset 2 and voltage detection interrupt can be used to check the input voltage
at the V pin.
CC
Figure 5.7 shows the voltage detection circuit. Figure 5.8 shows VCR1 and VCR2 registers. Figure 5.9
shows the D4INT register. Figure 5.10 shows an operation example of the voltage detection circuit. Fig-
ure 5.11 to 5.12 show the operation example of the voltage detection circuit to get out of stop mode.
VC27
V +
CC1
V
REF
-
Figure 5.7 Voltage Detection Circuit Block
Rev.0.91 2003 Sep 08
Noise canceller
page 20 of 184
VCR1 register
b3
VC13 bit
5.4 Voltage Detection Circuit
pin with Vdet. Besides
CC
Voltage detection
interrupt signal