upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 318

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

11.4.2 Input voltage and conversion result
of the A/D conversion result register (ADCR)) are related as follows.
318
The analog voltages input to the analog input pins (ANI0 to ANI11) and the result of the A/D conversion (contents
Or,
The relationship between the analog input voltage and A/D conversion result is shown below.
ADCR = INT(
(ADCR − 0.5) ×
INT ( ): Function that returns integer of value in ( )
V
AV
ADCR: Value of the A/D conversion result register (ADCR)
IN
:
REF
: AV
Figure 11-3. Relationship Between Analog Input Voltage and A/D Conversion Result
A/D conversion result
(ADCR)
Analog input voltage
REF
pin voltage
AV
V
AV
IN
REF
1024
REF
× 1024 + 0.5)
≤ V
1023
1022
1021
IN
3
2
1
0
< (ADCR + 0.5) ×
CHAPTER 11 A/D CONVERTER
2048 1024 20481024 2048 1024
1
User’s Manual U12768EJ4V1UD
1
3
2
AV
1024
5
REF
Input voltage/AV
3
2043 1022 20451023 2047 1
2048 1024 20481024 2048
REF