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PIC16F720-E/ML 数据表(PDF) 77 Page - Microchip Technology |
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PIC16F720-E/ML 数据表(HTML) 77 Page - Microchip Technology |
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77 / 244 page  2010 Microchip Technology Inc. DS41430A-page 77 PIC16F/LF720/721 9.0 ANALOG-TO-DIGITAL CONVERTER (ADC) MODULE The Analog-to-Digital Converter (ADC) allows conversion of an analog input signal to a 8-bit binary representation of that signal. This device uses analog inputs, which are multiplexed into a single sample and hold circuit. The output of the sample and hold is connected to the input of the converter. The converter generates a 8-bit binary result via successive approximation and stores the conversion result into the ADC result register (ADRES). Figure 9-1 shows the block diagram of the ADC. The ADC voltage reference is software selectable to be either internally generated or externally supplied. The ADC can generate an interrupt upon completion of a conversion. This interrupt can be used to wake-up the device from Sleep. FIGURE 9-1: ADC BLOCK DIAGRAM AN0 AN1 AN2 AN4 ADON GO/DONE CHS<3:0> VSS AN5 AN6 AN7 AN3 AN8 AN9 AN10 AN11 Temperature Indicator FVREF 0000 0001 0010 0011 0100 0101 0111 0110 1000 1001 1010 1011 1110 1111 8 ADC ADRES AVDD |
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