PD17012_15 Datasheet, PDF (146/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
13. A/D CONVERTER (ADC)
13.1 General
Figure 13-1 illustrates the A/D converter.
The A/D converter compares an analog voltage input to the ADC0 or ADC1 pins with the internal compare voltage,
judges the comparison result via software, and converts the analog signal into a 6-bit digital signal.
The comparison result can be detected by the ADCCMP flag.
As the comparison method, successive approximation is employed.
Figure 13-1. Outline of A/D Converter
ADCCH1 flag
ADCCH0 flag
P1B0/ADC0
P1B1/ADC1
Input select
block
Set/reset
Compare block
ADCCMP flag
DBF
6
Compare voltage
generator block
(R-string D/A
converter)
Remarks 1. ADCCH0 and ADCCH1 (bits 0 and 1 of the A/D converter channel select register; refer to Figure
13-3) select the pin used for the A/D converter.
2. ADCCMP (bit 0 of the A/D converter compare judge register; refer to Figure 13-5) detects the result
of comparison.
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Data Sheet U10101EJ4V0DS