参数资料
型号: ST72622L2T1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
封装: TQFP-44
文件页数: 127/134页
文件大小: 815K
代理商: ST72622L2T1
ST7262
92/134
10-BIT A/D CONVERTER (ADC) (Cont’d)
10.7.6 Register Description
CONTROL/STATUS REGISTER (ADCCSR)
Read/Write (Except bit 7 read only)
Reset Value: 0000 0000 (00h)
Bit 7 = EOC
End of Conversion
This bit is set by hardware. It is cleared by soft-
ware reading the ADCDRMSB register.
0: Conversion is not complete
1: Conversion complete
Bit 6 = SPEED
ADC clock selection
This bit is set and cleared by software.
0: fADC =fCPU/2
1: fADC =fCPU/4
Bit 5 = ADON
A/D Converter on
This bit is set and cleared by software or by hard-
ware after the end of a one shot conversion.
0: Disable ADC and stop conversion
1: Enable ADC and start conversion
Bit 4 = ITE
Interrupt Enable
This bit is set and cleared by software.
0: EOC Interrupt disabled
1: EOC Interrupt enabled
Bit 3 = ONESHOT
One Shot Conversion Selection
This bit is set and cleared by software.
0: Continuous conversion mode
1: One Shot conversion mode
Bit 2:0 = CS[2:0]
Channel Selection
These bits are set and cleared by software. They
select the analog input to convert.
*The number of channels is device dependent. Refer to
the device pinout description.
DATA REGISTER (ADCDRMSB)
Read Only
Reset Value: 0000 0000 (00h)
Bit 7:0 = D[9:2]
MSB of Analog Converted Value
This register contains the MSB of the converted
analog value.
DATA REGISTER (ADCDRLSB)
Read Only
Reset Value: 0000 0000 (00h)
Bit 7:2 = Reserved. Forced by hardware to 0.
Bit 1:0 = D[1:0]
LSB of Analog Converted Value
This register contains the LSB of the converted an-
alog value.
70
EOC
SPEED ADON
ITE
ONE
SHOT
CS2
CS1
CS0
Channel*
CS2
CS1
CS0
00
0
10
0
1
20
1
0
30
1
41
0
51
0
1
61
1
0
71
1
70
D9
D8
D7
D6
D5
D4
D3
D2
70
000
D1
D0
1
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