参数资料
型号: ST72C171K2B6
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
封装: SHRINK, PLASTIC, DIP-32
文件页数: 7/152页
文件大小: 2156K
代理商: ST72C171K2B6
ST72C171
104/152
8-BIT A/D CONVERTER (ADC) (Cont’d)
7.9.6 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.
Bit 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)
Bit 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.
70
COCO
0
ADON
0
CH3
CH2
CH1
CH0
Channel Pin*
CH3
CH2
CH1
CH0
AIN0
0
000
AIN1
0
001
AIN2
0
010
AIN3
0
011
AIN4
0
100
AIN5
0
101
AIN6
0
110
AIN7
0
111
AIN8
1
000
AIN9
1
001
AIN10
1
010
AIN11
1
011
AIN12
1
100
AIN13
1
101
AIN14
1
110
AIN15
1
111
70
D7
D6
D5
D4
D3
D2
D1
D0
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