ST72141K datasheet(109/132 Pages) STMICROELECTRONICS

部件名	ST72141K

功能描述	8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE

PDF	132 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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ST72141K

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8.5 8-BIT A/D CONVERTER (ADC)

8.5.1 Introduction

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

ripheral is a 8-bit, successive approximation con-

verter with internal sample and hold circuitry. This

peripheral has up to 8 multiplexed analog input

channels (refer to device pin out description) that

allow the peripheral to convert the analog voltage

levels from up to 8 different sources.

The result of the conversion is stored in a 8-bit

Data Register. The A/D converter is controlled

through a Control/Status Register.

8.5.2 Main Features

8-bit conversion

Up to 8 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 62.

Figure 62. ADC Block Diagram

SAMPLE

ANALOG

MUX

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

(Control Status Register) CSR

(Data Register) DR

HOLD

fCPU

ANALOG TO

DIGITAL

CONVERTER

COCO

0CH0

CH1

CH2

-ADON

AD7

AD4

AD0

AD1

AD2

AD3

AD6

AD5

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