On-chip peripherals
ST72324xx-Auto
10.6 10-bit A/D converter (ADC)
10.6.1
Introduction
The on-chip analog-to-digital converter (ADC) peripheral is a 10-bit, successive
approximation converter with internal sample and hold circuitry. This peripheral has up to 16
multiplexed analog input channels (refer to device pin out description) that allow the
peripheral to convert the analog voltage levels from up to 16 different sources.
The result of the conversion is stored in a 10-bit Data Register. The A/D converter is
controlled through a Control/Status Register.
olete Product(s) 10.6.2
Main features
● 10-bit conversion
● Up to 16 channels with multiplexed input
● Linear successive approximation
● Data register (DR) which contains the results
● Conversion complete status flag
● On/off bit (to reduce consumption)
The block diagram is shown in Figure 59.
Figure 59. ADC block diagram
t(s) - Obs fCPU
Div 4
Div 2
0 fADC
1
lete Produc AIN0
Obso AIN1
EOC SPEED ADON 0 CH3 CH2 CH1 CH0 ADCCSR
4
Analog
MUX
Analog to Digital
Converter
AINx
ADCDRH D9 D8 D7 D6 D5 D4 D3 D2
ADCDRL 0 0 0 0 0 0 D1 D0
132/193
Doc ID 13841 Rev 1