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12.1 A/D Converter Functions
The A/D converter converts an analog input into a digital value. It consists of 8 channels (ANI0 to ANI7) with
an 8-bit resolution.
The conversion method is based on successive approximation and the conversion result is held in the 8-bit
A/D conversion result register (ADCR).
A/D conversion can be started in the following two ways.
(1) Hardware start
Conversion is started by trigger input (INTP3).
(2) Software start
Conversion is started by setting the A/D converter mode register (ADM).
Select one channel of analog input from ANI0 to ANI7 and carry out A/D conversion. In the case of a hardware
start, when A/D conversion finishes, the A/D converter stops and an interrupt request (INTAD) is generated. In
the case of a software start, the A/D conversion operation is repeated. Each time an A/D conversion operation
ends, an interrupt request (INTAD) is generated.
12.2 A/D Converter Configuration
The A/D converter consists of the following hardware.
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CHAPTER 12
Table 12-1. A/D Converter Configuration
Item
Analog input
8 channels (ANI0 to ANI7)
Control registers
A/D converter mode register (ADM)
A/D converter input select register (ADIS)
Registers
Successive approximation register (SAR)
A/D conversion result register (ADCR)
User's Manual U11302EJ4V0UM
A/D CONVERTER
Configuration
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