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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STMPE1208S датащи(PDF) 21 Page - STMicroelectronics |
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STMPE1208S датащи(HTML) 21 Page - STMicroelectronics |
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21 / 51 page  STMPE1208S Register map and function description 21/51 FEATURE_SEL Feature selection register Address: 0x00 Type: R/W Reset: 0x04 Description: The feature selection register is used to select the AFS mode and filter enable TVR Touch variance register [0-11] Address: 0x01 - 0x0C Type: R/W Reset: 0x08 Description: Setting the TVR between 0 - 99 A high TVR value decreases the sensitivity of the sensor, but increasing its tolerance to ambient noise. A small TVR value increases the sensitivity. Each step of TVR is equivalent to a capacitance of 60 fF Recommended value to TVR is 4-8. 7654 3 2 1 0 RESERVED AFS3 AFS2 AFS1 FILTER_EN [7:4] RESERVED [3] AFS3: write '1' to enable AFS mode 3 (two strongest keys only) [2] AFS2: write '1' to enable AFS mode 2 (all keys above threshold) [1] AFS1: write '1' to enable AFS mode 1 (one strongest key only) [0] FILTER_EN: write '1' to enable filter feature Note: only one bit among AFS1, AFS2, AFS3 could be set to '1' at the same time. If more than one are set to '1', results of the operation would be unpredictable. 7654 3 2 1 0 - TVR [6:0] [7] RESERVED [6:0] TVR [6:0] |
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