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User’s Manual U11969EJ3V0UM00
CHAPTER 9 A/D CONVERTER
The following shows the correspondence of each analog input pin to the ADCRn register (except 4-buffer mode).
Analog Input Pin
ADCRn Register
PS = 0
PS =1
ANI0
ANI8
ADCR0
ANI1
ANI9
ADCR1
ANI2
ANI10
ADCR2
ANI3
ANI11
ADCR3
ANI4
ANI12
ADCR4
ANI5
ANI13
ADCR5
ANI6
ANI14
ADCR6
ANI7
ANI15
ADCR7
Figure 9-2 shows the relation between the analog input voltage and the A/D conversion result.
Figure 9-2. Relation between Analog Input Voltage and A/D Conversion Result
0
1
512
1
2
3
A/D conversion
result (ADCRn)
253
254
255
1
256
3
512
2
256
5
512
3
256
Input voltage/AV
REF
507
512
254
256
509
512
255
256
511
512
1
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