UPD78F0078GK-9ET-A Renesas Electronics America, UPD78F0078GK-9ET-A Datasheet - Page 236

• Manufacturer Part Number: UPD78F0078GK-9ET-A
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0078GK-9ET-A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

234
13.4.2 Input voltage and conversion results
A/D conversion result (stored in A/D conversion result register 0 (ADCR0)) is shown by the following expression.
The relationship between the analog input voltage input to the analog input pins (ANI0 to ANI7) and the logical
or
where, INT( ):
Figure 13-8 shows the relationship between the analog input voltage and the A/D conversion result.
SAR = INT (
ADCR0 = SAR
(ADCR0 – 0.5)
A/D conversion result
Figure 13-8. Relationship Between Analog Input Voltage and A/D Conversion Result
V
AV
ADCR0: A/D conversion result register 0 (ADCR0) value
SAR:
AIN
REF
:
:
AV
V
(ADCR0)
AIN
REF
Function that returns integer part of value in parentheses
Analog input voltage
AV
Successive approximation register
64
AV
1024
REF
REF
1024 + 0.5)
pin voltage
1023
1022
1021
V
SAR
3
2
1
0
AIN
2048
< (ADCR0 + 0.5)
1
CHAPTER 13 A/D CONVERTER
1024
1
User’s Manual U14260EJ4V0UD
2048
3
1024
2
2048
5
AV
Input voltage/AV
1024
1024
REF
3
2043
2048
REF
1022
1024
2045
2048
1023
1024
2047
2048
ADCR0
1
FFC0H
FF80H
FF40H
0000H
00C0H
0080H
0040H