ST7263B datasheet(88/132 Pages) STMICROELECTRONICS

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ST7263B

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8-BIT A/D CONVERTER (ADC) (Cont’d)

11.6.6 Register Description

CONTROL/STATUS REGISTER (CSR)

Read /Write

Reset Value: 0000 0000 (00h)

Bit 7 = COCO

Conversion Complete

This bit is set by hardware. It is cleared by soft-

ware reading the result in the DR register or writing

to the CSR register.

0: Conversion is not complete

1: Conversion can be read from the DR register

Bit 6 = Reserved.

must always be cleared.

Bit 5 = ADON

A/D Converter On

This bit is set and cleared by software.

0: A/D converter is switched off

1: A/D converter is switched on

Bit 4 = Reserved.

must always be cleared.

Bits 3:0 = CH[3:0]

Channel Selection

These bits are set and cleared by software. They

select the analog input to convert.

*Note: The number of pins AND the channel selec-

tion varies according to the device. Refer to the de-

vice pinout.

DATA REGISTER (DR)

Read Only

Reset Value: 0000 0000 (00h)

Bits 7:0 = D[7:0]

Analog Converted Value

This register contains the converted analog value

in the range 00h to FFh.

Note: Reading this register reset the COCO flag.

COCO

ADON

CH3

CH2

CH1

CH0

Channel Pin*

CH3

CH2

CH1

CH0

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

AIN8

AIN9

AIN10

AIN11

AIN12

AIN13

AIN14

AIN15

ST7263B 数据表(PDF) 88 Page - STMicroelectronics

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