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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMD4903 датащи(PDF) 36 Page - OSRAM GmbH |
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TMD4903 датащи(HTML) 36 Page - OSRAM GmbH |
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36 / 86 page  Datasheet, Public Page 35 [v2-00] 2022-Nov-03 Document Feedback TMD4903 − Register Description Proximity Data Registers (0x9C – 0x9D) Proximity data is stored as a 14-bit value (two bytes). PDATA has a two-byte latch like 16-bit fields. Reading the low byte first latches the high byte. Proximity detection uses an Automatic Pulse Control (APC) mechanism that adjusts the number of pulses per measurement based on the magnitude of the reflected IR signal. As the magnitude of the signal increases, the number of pulses decreases. Proximity detection uses a 10-bit ADC that is extended to a 14-bit dynamic range for PDATA using the following formula: PDATA = ADCvalue x (16 / proximity pulses) PDATA is the average response of the non-masked proximity photodiodes. If one or more photodiodes are masked (CFG2 register 0x9F), the proximity response will remain the same since it is an average of the active photodiodes. PDATA is therefore proportional to the reflected energy per pulse, independent of the number of pulses used. Figure 41: Proximity Data Register Field Register Bits Description PDATA 0x9C 7:0 Proximity data low byte 0x9D 13:8 Proximity data high byte |
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