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BU21180FS Datasheet(PDF) 26 Page - Rohm |
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BU21180FS Datasheet(HTML) 26 Page - Rohm |
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26 / 43 page  26/40 © 2017 ROHM Co., Ltd. All rights reserved. www.rohm.com TSZ22111 • 15 • 001 BU21180FS TSZ02201-0L5L0F300930-1-2 06.Aug.2018 Rev.002 0x9B: Control Mode Name: MODE_CFG Address: 0x9B Description: This register configures the functions for calibration and sensor. SCAN_SEL: Sensor High Impedance This bit configures the states of enabled sensors during the other sensor is sensing. 0: Sensor outputs low. 1: Sensor becomes high impedance. ADJ_OFS_ENB: Offset Calibration This bit configures whether the offset calibration to the register “Filter Sensor Data” is performed or not. 0: Offset calibration is enabled. 1: Offset calibration is disabled. The limitation about offset calibration 1. The register “Switch ON Threshold” setting value is 0x50 or over. 2. The register “Periodical Calibration” settings is disabled, or the register “Filter Tap” setting value is 0x06 or over when the register “Periodical Calibration” is enabled. 3. The completion without calibration failures is needed to confirm the register “Calibration Failure Number of Times ” before and after the software calibration completion is complete. Calibration must to be performed again when calibration failures. UNK_CAL_EN: Unexpected Long Press Calibration This bit configures whether automatic calibration is performed when unexpected long press is detected. This calibration is effective only to the unexpected long press switches. 0: Unexpected Long Press Calibration is disabled. 1: Unexpected Long Press Calibration is enabled. LOWER_CAL_EN: Lower Calibration This bit configures whether automatic calibration is performed when the data of the register “Filter Sensor Data ” is smaller than the reference value. When the offset calibration is enabled, this calibration is disabled. 0: Lower Calibration is disabled. 1: Lower Calibration is enabled. CAL_SFT_EN: Sampling Frequency Modulation This bit configures whether frequency modulation is performed when calibration fails. 0: Frequency modulation is disabled. 1: Frequency modulation is enabled. MLT_SW_EN: Multiple Switches Control This bit configures whether multiple switches are usable at the same time. In the case multiple switches are usable, the register “Switch Detection Time” and “Multiple Pattern Switches Assignment” are disabled. 0: Multiple switches are unusable. 1: Multiple switches are usable. Address R/W Initial Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0x9B R/W 0x80 MLT_SW _EN - - CAL_SFT _EN LOWER _CAL_EN UNK_CAL _EN ADJ_OFS _ENB SCAN_SEL 0x9C: Oversampling Name: OST_CFG Address: 0x9C Description: This register configures the number of oversampling to reject chattering. The result is reflected to the register “Switch ON Detection” and “Switch OFF Detection” when ON / OFF judgment is same as “OST[3:0]+1” times. Address R/W Initial Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0x9C R/W 0x03 - - - - OST[3:0] |
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