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C8051F50X Datasheet(PDF) 70 Page - Silicon Laboratories |
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C8051F50X Datasheet(HTML) 70 Page - Silicon Laboratories |
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70 / 312 page  C8051F50x-F51x 70 Rev. 1.1 6.5. ADC0 Analog Multiplexer ADC0 includes an analog multiplexer to enable multiple analog input sources. Any of the following may be selected as an input: P0.0–P3.7, the on-chip temperature sensor, the core power supply (VDD), or ground (GND). ADC0 is single-ended and all signals measured are with respect to GND. The ADC0 input channels are selected using the ADC0MX register as described in SFR Definition 6.13. Figure 6.8. ADC0 Multiplexer Block Diagram Important Note About ADC0 Input Configuration: Port pins selected as ADC0 inputs should be config- ured as analog inputs, and should be skipped by the Digital Crossbar. To configure a Port pin for analog input, set to 0 the corresponding bit in register PnMDIN. To force the Crossbar to skip a Port pin, set to 1 the corresponding bit in register PnSKIP. See Section “20. Port Input/Output” on page 177 for more Port I/O configuration details. ADC0 Temp Sensor AMUX VDD ADC0MX P0.0 *P3.1-P3.7 Only available as inputs on 48-pin and 40-pin packages GND P0.7 P1.0 P1.7 P2.0 P2.7 P3.0 P3.7 |
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