Table of Contents
Advertisement
19. A/D CONVERTER
The PD17062 contains a 4-bit program-controlled A/D converter that operates with a successive compari-
son method.
19.1 PRINCIPLE OF OPERATION
The A/D converter in the PD17062 consists of a 4-bit resistor string-based D/A converter and comparator.
The D/A converter is set with data using a 4-bit register (ADCR) mapped at peripheral address 02H. The
result of comparison is judged according to the ADCCMP flag in the register file.
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
Fig. 19-1 A/D Converter Configuration
ADCCH (R/W)
ADCCMP (R)
ADCCH ADCCH ADCCH
AD
2
1
0
CCMP
Channel
selector
D/A converter
ADCR
RF : 21H
Comparator
Peripheral address: 02H
ADCR (R/W)
PD17062
233
Advertisement
Table of Contents
