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16. A/D Converter (ADC)
16.1
Overview
The ML63611 has a built-in 2-channel RC oscillation method A/D converter. The A/D converter is composed of
a 2-channel oscillation circuit, Counter A (CNTA0 to 4) which is a 4.8-digit decade counter, Counter B (CNTB0
to 3) which is a 14-bit binary counter and A/D converter control registers 0 and 1 (ADCON0, ADCON1).
By counting oscillation frequencies due to resistance or capacitance connected to the RC oscillation circuit, the
A/D converter converts resistance values or capacitance values to corresponding digital values. By using a
thermistor or a humidity sensor as a resistance, a thermometer or a hygrometer can be constructed. By applying
sensors to the 2-channel RC oscillation circuit, it is also possible to extend measurement ranges or measurement at
two places.
OPTION A (C): 1.5 V (3.0 V), Without regulator
circuit for LCD bias
Chapter 16 A/D Converter (ADC)
16 – 1
OPTION B (D): 1.5 V (3.0 V), With regulator
ML63611 User's Manual
circuit for LCD bias
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