MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 211
MC-78F0712-KIT
Manufacturer Part Number
MC-78F0712-KIT
Description
KIT REF SYSTEM 78K0 UPD78F0712
Manufacturer
Renesas Electronics America
Specifications of MC-78F0712-KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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13.4 Relationship Between Input Voltage and A/D Conversion Results
A/D conversion result (stored in the A/D conversion result register (ADCR)) is shown by the following expression.
The relationship between the analog input voltage input to the analog input pins (ANI0 to ANI3) and the theoretical
or
where, INT( ):
Figure 13-9 shows the relationship between the analog input voltage and the A/D conversion result.
SAR = INT (
ADCR = SAR × 64
(ADCR
A/D conversion result
V
AV
ADCR: A/D conversion result register (ADCR) value
SAR:
AIN
REF
Figure 13-9. Relationship Between Analog Input Voltage and A/D Conversion Result
:
0.5)
:
AV
Function which returns integer part of value in parentheses
Analog input voltage
AV
Successive approximation register
V
AIN
(ADCR)
REF
AV
1024
REF
REF
pin voltage
1024 + 0.5)
V
AIN
< (ADCR + 0.5)
1023
1022
1021
SAR
3
2
1
0
CHAPTER 13 A/D CONVERTER
2048
1
User’s Manual U17890EJ2V0UD
1024
1
2048
AV
1024
3
REF
1024
2
2048
5
Input voltage/AV
1024
3
2043
2048
REF
1022
1024
2045
2048
1023
1024
2047
2048
ADCR
1
FFC0H
FF80H
FF40H
00C0H
0080H
0040H
0000H
209
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