Renesas R8C/20 User Manual

R8C/20 Group, R8C/21 Group 6. Voltage Detection Circuit
Rev.2.00 Aug 27, 2008 Page 29 of 458
REJ09B0250-0200
Figure 6.1 Block Diagram of Voltage Detection Circuit
Figure 6.2 Block Diagram of Voltage Monitor 1 Reset Generation Circuit
≥ Vdet2
VCA27
Noise filter
+
-
VCA26
+
-
VCC
≥ Vdet1
b3
VCA13 bit
VCA1 register
Voltage detection 2
signal
Voltage detection 1
signal
Internal
reference
voltage
+
-
1/2 1/2 1/2
Voltage detection 1 circuit
VCA26
VCC
Internal
reference
voltage
Voltage detection 1
signal is held “H” when
VCA26 bit is set to “0”
(disabled)
Voltage
detection 1
signal
fOCO-S
VW1F1 to VW1F0
= 00b
= 01b
= 10b
= 11b
VW1C7
VW1C6
Voltage monitor 1 reset generation circuit
VW1C0 to VW1C1, VW1F0 to VW1F1, VW1C6, VW1C7: Bits in VW1C register
VCA26: Bit in VCA2 register
VW1C0
VW1C1
Voltage
monitor 1
reset signal
VW1C1
Digital
filter

Renesas R8C/20 Specifications

General

Brand	Renesas
Model	R8C/20
Category	Control Unit
Language	English