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Chapter 15
A/D Converter
Preliminary User’s Manual U15839EE1V0UM00
15.5 A/D Converter Operation
15.5.1 A/D converter basic operation
A/D conversion is performed using the following procedure.
(1)
Set the analog input selection using the ADS
Note 1
register. Setting (1) the ADCS
Note 2
bit of the
ADM
Note 1
register starts the A/D conversion for the selected A/D input channel.
(2)
When the A/D conversion starts, the selected analog input is compared with the voltage generated
by the D/A converter.
(3)
When the 10-bit comparison is completed, the conversion result is stored in the ADCR, ADCRL
and ADCRH registers and a new conversion operation is started.
(4)
An interrupt request signal (INTAD) is generated after completion of each conversion.
Notes: 1. If a write operation is carried out to the ADM or the ADS register during conversion
operation, the conversion operation is aborted and restarts from the beginning.
2. If the ADCS bit of the ADM register is cleared (0) during a A/D conversion operation, the
conversion operation is aborted and conversion operation is stopped.
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