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R8C/14 Group, R8C/15 Group
16. A/D Converter
A/D Conversion Rate Selection
f1
CKS0=1
CKS1=1
φAD
f2
CKS1=0
f4
CKS0=0
VCUT=0
AVSS
VREF
Resistor Ladder
VCUT=1
Successive Conversion Register
Software Trigger
ADCAP=0
ADCON0
Trigger
Timer Z
Interrupt Request
ADCAP=1
Vcom
AD Register
Decoder
Comparator
VIN
Data Bus
ADGSEL0=0
ADGSEL0=1
P1_0/AN8
P1_1/AN9
P1_2/AN10
P1_3/AN11
CH2 to CH0=100b
CH2 to CH0=101b
CH2 to CH0=110b
CH2 to CH0=111b
CH0 to CH2, CKS0 : Bits in ADCON0 register
CKS1, VCUT: Bits in ADCON1 register
Figure 16.1
Block Diagram of A/D Converter
Rev.2.10 Jan 19, 2006
REJ09B0164-0210
Page 169 of 253
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