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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MSP430 датащи(PDF) 30 Page - Texas Instruments |
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MSP430 датащи(HTML) 30 Page - Texas Instruments |
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30 / 88 page  7.3.2 Analog-to-Digital Converter (ADC) Overview The AFEx8101 feature a monitoring system centered on a 12-bit successive approximation register (SAR) ADC and a highly flexible analog multiplexer. The monitoring system is capable of sensing up to two external inputs, as well as several internal device signals. The ADC uses the VREFIO pin voltage as a reference. The ADC timing signals are derived from an on-chip oscillator. The conversion results are accessed through the device serial interface. 7.3.2.1 ADC Operation The device ADC supports direct-mode and auto-mode conversions. Both conversion modes use a custom channel sequencer to determine which of the input channels are converted by the ADC. The sequence order is fixed. The user selects the start channel and stop channel of the conversion sequence. The conversion method and channel sequence are specified in the ADC Configuration registers. The default conversion method is auto-mode. Figure 7-8 shows the ADC conversion sequence. START Set ADC_CFG.BUF_PD = 0, ADC_CFG.DIRECT_MODE = 0 or 1 TRIGGER.ADC =1? Yes No Set ADC mux to ADC_INDEX_CFG. START Convert ADC ADC idle state Increment ADC custom channel sequencer ADC_CFG. DIRECT_MODE =1? TRIGGER_ADC = 0? Yes No No No Yes ADC_INDEX.STOP (last conversion Completed)? Yes Figure 7-8. ADC Conversion Sequence AFE78101, AFE88101 SLASF21 – DECEMBER 2022 www.ti.com 30 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: AFE78101 AFE88101 |
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