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SH79F166AP/044PR Datasheet(PDF) 86 Page - SINOWEALTH Electronic Ltd |
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SH79F166AP/044PR Datasheet(HTML) 86 Page - SINOWEALTH Electronic Ltd |
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86 / 113 page  SH79F166A 86 8.5 Analog Digital Converter (ADC) 8.5.1 Feature 10-bit Resolution Build in VREF Selectable external or built-in VREF 8 Multiplexed Input Channels The SH79F166A include a single ended, 10-bit SAR Analog to Digital Converter (ADC) with build in reference voltage connected to the VDD, users also can select the VREF pin input reference voltage. The 7 ADC channels are shared with 1 ADC module; each channel can be programmed to connect with the analog input individually. Only one channel can be available at one time. GO/DONE ———— signal is available to start convert, and indicate end of convert. When conversion is completed, the data in AD convert data register will be updated and ADCIF bit in ADCON register will be set. If ADC Interrupt is enabled, the ADC interrupt will generate. The ADC integrates a digital compare function to compare the value of analog input with the digital value in the AD converter. If this function is enabled (set EC bit in ADCON register) and ADC module is enabled (set ADON bit in ADCON register). When the corresponding digital value of analog input is larger than the value in compare value register (ADDH/L), the ADC interrupt will occur, otherwise no interrupt will be generated. The digital comparator can work continuously when GO/DONE ———— bit is set until software clear, which behaviors different with the AD converter operation mode. The ADC module including digital compare module can wok in Idle mode and the ADC interrupt will wake up the Idle mode, but is disabled in Power-Down mode. 8.5.2 ADC Diagram Input voltage SCH2 - SCH0 ADC AN0 AN2 AN3 CH7 - CH0 011 100 101 110 111 AN4 AN5 V DD Input reference voltage REFC 0 AV REF 1 000 001 010 AN6 AN7 AN1 ADC Diagram |
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