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SN8A1702AX データシート(PDF) 94 Page - SONiX Technology Company |
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SN8A1702AX データシート(HTML) 94 Page - SONiX Technology Company |
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94 / 112 page  Preliminary SN8P1702A/SN8P1703A 8-bit micro-controller build-in 12-bit ADC SONiX TECHNOLOGY CO., LTD Page 94 Revision 0.5 1 1 11 1 14-CHANNELANALOG TO DIGITAL CONVERTER OVERVIEW This analog to digital converter of SN8P1702A/SN8P1703A has 4-input sources with up to 4096-step resolution to transfer analog signal into 12-bits digital data. The sequence of ADC operation is to select input source (AIN0 ~ AIN3) at first, then set GCHS and ADS bit to “1” to start conversion. When the conversion is complete, the ADC circuit will set EOC bit to “1” and final value output in ADB register. This ADC circuit can select between 8-bit and 12-bit resolution operation by programming ADLEN bit in ADR register. Figure 11-1. AD Converter Function Diagram Note: For 8-bit resolution, the conversion time is 12 steps. For 12-bit resolution, the conversion time is 16 steps. Note: The analog input level must be between the AVREFH and VSS. Note: The AVREFH level must be between the VDD and VSS+1.2V. A/D CONVERTER (ADC) 8/12 AIN0/P4.0 AIN2/P4.2 AIN3/P4.3 AIN1/P4.1 A/D CONVERTER (ADC) 8/12 8/12 AIN0/P4.0 AIN0/P4.0 AIN2/P4.2 AIN2/P4.2 AIN3/P4.3 AIN3/P4.3 AIN1/P4.1 AIN1/P4.1 |
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