參數(shù)資料
型號(hào): DMC73C168
英文描述: 8Bit Single Chip Microcontroller
中文描述: 8位單芯片微控制器
文件頁數(shù): 47/90頁
文件大?。?/td> 742K
代理商: DMC73C168
47
8Bit Single Chip Microcontroller
DMC73C167
Table 5-27. P17 0111h ADDATA A/D Conversion Data
Bit
R
7
6
5
4
3
2
1
0
Not used
A/D Conversion Data
W
Invalid
Bit 0-3
A/D Conversion Data
4-bit A/D conversion data is retrieved by the read operation.
The write operation is not available through this register.
Bit 4-7
Not used.
5.6.3 A/D Converter Operation
The A/D converter operation procedure is as follows.
1) Turn on the 14-bit PWM.
2) Set the ADENA bit (ADCTL register bit 0) to 1.
3) Set the START (ADCTL register bit 7) to 1. Then A/D conversion starts.
4) The conversion data is transferred to the ADDATA register after A/D conversion is
completed. It takes 40 machine cycles.
5) The ADDATA register can be read. If the START bit is set to 0 during A/D conversion, the
A/D converter operation is terminated after A/D conversion is completed. This timing is
shown in Figure 5-9 for single conversion and Figure 5-10 for continuous conversion.
There is no status flag, so user should wait 40 machine cycles.
Attention :
The 14-bit PWM should be runing before turning on the A/D conversion.
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