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数据搜索系统，热门电子元器件搜索 |
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ST72371 数据表(PDF) 74 Page - STMicroelectronics |
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ST72371 数据表(HTML) 74 Page - STMicroelectronics |
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74 / 94 page  74/94 ST72371/ST72372 4.7 8-BIT A/D CONVERTER (ADC) 4.7.1 Introduction The on-chip Analog to Digital Converter (ADC) pe- ripheral is a 8-bit, successive approximation con- verter with internal sample and hold circuitry. This peripheral has up to 8 multiplexed analog input channels (refer to device pin out description) that allow the peripheral to convert the analog voltage levels from up to 8 different sources. The result of the conversion is stored in a 8-bit Data Register. The A/D converter is controlled through a Control/Status Register. 4.7.2 Main Features s 8-bit conversion s Up to 8 channels with multiplexed input s Linear successive approximation s Data register (DR) which contains the results s Conversion complete status flag s On/off bit (to reduce consumption) The block diagram is shown inFigure 1. Figure 34. ADC block diagram SAMPLE ANALOG MUX AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 0 COCO CH0 CH1 CH2 - - ADON (Control Status Register) CSR AD7 AD0 AD1 AD2 AD3 AD6 AD5 (Data Register) DR & HOLD fCPU ANALOG TO DIGITAL CONVERTER AD4 |
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