ST72325S6B5(2007) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72325S6B5
(Rev.:2007)

8-bit MCU with 16 to 60K Flash/ROM, ADC, CSS, 5 timers, SPI, SCI, I2C interface

STMicroelectronics 

10.8 10-BIT A/D CONVERTER (ADC)

10.8.1 Introduction

The on-chip Analog to Digital Converter (ADC) pe-

ripheral is a 10-bit, successive approximation con-

verter 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.

Figure 71. ADC Block Diagram

fCPU

DIV 4

DIV 2

0 fADC

1

10.8.2 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 71.

EOC SPEED ADON 0 CH3 CH2 CH1 CH0 ADCCSR

AIN0

AIN1

AINx

4

ANALOG

MUX

ANALOG TO DIGITAL

CONVERTER

ADCDRH

D9 D8 D7 D6 D5 D4 D3 D2

ADCDRL

0 0 0 0 0 0 D1 D0

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