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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4365 датащи(PDF) 24 Page - STMicroelectronics |
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AN4365 датащи(HTML) 24 Page - STMicroelectronics |
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24 / 35 page  STM32F4 low-power application case AN4365 24/35 DocID025303 Rev 2 3 STM32F4 low-power application case Sensors are a fundamental part of the human/machine interface. This part of the application note provides an example of a sensor hub based on STM32F4 devices and focuses on the low-power modes used to reduce the consumption of this application. The figure below describes a complete sensor hub example, from which we built the simplified application described in the next section. Figure 11. STM32F4 sensor hub example The next parts of this application note describe the following main items: • Application case overview • Software and hardware environment • Current consumption measurement 3.1 Application overview This application consists of a communication between a sensor hub and a sensor based on two STM32F4 devices. One device is configured as master (sensor hub) and the other as slave (sensor). The main features of the application are: • ADC with 1024 VBAT voltage samples • Low-power techniques described in the first chapter • Sensor hub FFT samples transformation with maximum device frequency |
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