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전자부품 데이터시트 검색엔진 |
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101 / 154 page  ST7232A 101/154 10.6 10-BIT A/D CONVERTER (ADC) 10.6.1 Introduction The on-chip Analog to Digital Converter (ADC) pe- ripheral is a 10-bit, successive approximation con- verter with internal sample and hold circuitry. This peripheral has up to 16 multiplexed analog input channels (refer to device pin out description) that allow the peripheral to convert the analog voltage levels from up to 16 different sources. The result of the conversion is stored in a 10-bit Data Register. The A/D converter is controlled through a Control/Status Register. 10.6.2 Main Features ■ 10-bit conversion ■ Up to 16 channels with multiplexed input ■ Linear successive approximation ■ Data register (DR) which contains the results ■ Conversion complete status flag ■ On/off bit (to reduce consumption) The block diagram is shown in Figure 54. Figure 54. ADC Block Diagram CH2 CH1 EOC SPEED ADON 0 CH0 ADCCSR AIN0 AIN1 ANALOG TO DIGITAL CONVERTER AINx ANALOG MUX D4 D3 D5 D9 D8 D7 D6 D2 ADCDRH 4 DIV 4 fADC fCPU D1 D0 ADCDRL 0 1 0 0 00 00 CH3 DIV 2 1 |
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