Input Voltage And Conversion Results - NEC V850E/CA2 JUPITER Preliminary User's Manual

15.3.2 Input voltage and conversion results

The relation between the analog input voltage input to the analog input pins (ANI0 to ANI11) and the
A/D conversion result (stored in the A/D conversion result registers (ADCR)) is shown by the following
expression:
or the following expression:
(ADCR/64 – 0.5) × AV
where,
INT( ): Function which returns integer part of value in parentheses
V : Analog input voltage
IN
AV : AV pin voltage and A/D converter power supply
DD DD
ADCRL: A/D conversion result register (ADCRL) value
Figure 15-9, "Relation between Analog Input Voltage and A/D Conversion Result," on page 536 shows
the relation between the analog input voltage and the A/D conversion result.
Chapter 15 A/D Converter
[ (
ADCR = INT
REF
1024
Preliminary User's Manual U15839EE1V0UM00
× 1024)
(AV
IN
± 0,5) ] × 64
AV
REF
(ADCR/64 + 0.5) × AV
<= V <
IN
1024
REF
535