參數(shù)資料
型號: ST72C254G2M6
英文描述: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY. ADC. 16-BIT TIMERS. SPI.
中文描述: 8位單電壓閃存微控制器。 ADC的。 16位定時器。的SPI。
文件頁數(shù): 128/140頁
文件大小: 1349K
代理商: ST72C254G2M6
ST72104G, ST72215G, ST72216G, ST72254G
88/140
8-BIT A/D CONVERTER (ADC) (Cont’d)
12.5.6 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.
70
COCO
0
ADON
0
CH3
CH2
CH1
CH0
Channel Pin*
CH3
CH2
CH1
CH0
AIN0
0
AIN1
0
1
AIN2
0
1
0
AIN3
0
1
AIN4
0
1
0
AIN5
0
1
0
1
AIN6
0
1
0
AIN7
0
1
AIN8
1
0
AIN9
1
0
1
AIN10
1
0
1
0
AIN11
1
0
1
AIN12
1
0
AIN13
1
0
1
AIN14
1
0
AIN15
1
70
D7
D6
D5
D4
D3
D2
D1
D0
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