SH79F166APSLASH044PR datasheet(86/113 Pages) SINOWEALTH

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SH79F166A

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

Input reference

voltage

REFC

REF

000

001

010

AN6

AN7

AN1

ADC Diagram

SH79F166AP/044PR 데이터시트(PDF) 86 Page - SINOWEALTH Electronic Ltd

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