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41594B датащи(PDF) 125 Page - Microchip Technology |
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41594B датащи(HTML) 125 Page - Microchip Technology |
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125 / 372 page ![]() 2011-2012 Microchip Technology Inc. Preliminary DS41594B-page 125 PIC12LF1840T48A 16.0 ANALOG-TO-DIGITAL CONVERTER (ADC) MODULE The Analog-to-Digital Converter (ADC) allows conversion of an analog input signal to a 10-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 10-bit binary result via successive approximation and stores the conversion result into the ADC result registers (ADRESH:ADRESL register pair). Figure 16-1 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 16-1: ADC BLOCK DIAGRAM Note 1: When ADON = 0, all multiplexer inputs are disconnected. DAC VDD VREF ADPREF = 10 ADPREF = 00 ADPREF = 11 FVR Buffer1 ADON(1) GO/DONE VSS ADC 00000 00001 00010 00011 11110 CHS<4:0> AN0 AN1 AN2 AN3 11111 ADRESH ADRESL 10 16 ADFM 0 = Left Justify 1 = Right Justify Temp Indicator 11101 |
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