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CAP1166 Datasheet(PDF) 42 Page - Microchip Technology |
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CAP1166 Datasheet(HTML) 42 Page - Microchip Technology |
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42 / 79 page  2015 Microchip Technology Inc. DS00001621B-page 42 CAP1166 APPLICATION NOTE: The programmed cycle time is only maintained if the total averaging time for all samples is less than the programmed cycle. The AVG[2:0] bits will take priority so that if more samples are required than would normally be allowed during the cycle time, the cycle time will be extended as necessary to accommodate the number of samples to be measured. 6.11 Calibration Activate Register The Calibration Activate register forces the respective sensor inputs to be re-calibrated affecting both the analog and digital blocks. During the re-calibration routine, the sensor inputs will not detect a press for up to 600ms and the Sensor Input Base Count register values will be invalid. During this time, any press on the corresponding sensor pads will inval- idate the re-calibration. When finished, the CALX[9:0] bits will be updated (see Section 6.39). When the corresponding bit is set, the device will perform the calibration and the bit will be automatically cleared once the re-calibration routine has finished. Bit 5 - CS6_CAL - When set, the CS6 input is re-calibrated. This bit is automatically cleared once the sensor input has been re-calibrated successfully. Bit 4 - CS5_CAL - When set, the CS5 input is re-calibrated. This bit is automatically cleared once the sensor input has been re-calibrated successfully. Bit 3 - CS4_CAL - When set, the CS4 input is re-calibrated. This bit is automatically cleared once the sensor input has been re-calibrated successfully. Bit 2 - CS3_CAL - When set, the CS3 input is re-calibrated. This bit is automatically cleared once the sensor input has been re-calibrated successfully. Bit 1 - CS2_CAL - When set, the CS2 input is re-calibrated. This bit is automatically cleared once the sensor input has been re-calibrated successfully. Bit 0 - CS1_CAL - When set, the CS1 input is re-calibrated. This bit is automatically cleared once the sensor input has been re-calibrated successfully. 6.12 Interrupt Enable Register The Interrupt Enable register determines whether a sensor pad touch or release (if enabled) causes the interrupt pin to be asserted. Bit 5 - CS6_INT_EN - Enables the interrupt pin to be asserted if a touch is detected on CS6 (associated with the CS6 status bit). • ‘0’ - The interrupt pin will not be asserted if a touch is detected on CS6 (associated with the CS6 status bit). • ‘1’ (default) - The interrupt pin will be asserted if a touch is detected on CS6 (associated with the CS6 status bit). Bit 4 - CS5_INT_EN - Enables the interrupt pin to be asserted if a touch is detected on CS5 (associated with the CS5 status bit). Bit 3 - CS4_INT_EN - Enables the interrupt pin to be asserted if a touch is detected on CS4 (associated with the CS4 status bit). Bit 2 - CS3_INT_EN - Enables the interrupt pin to be asserted if a touch is detected on CS3 (associated with the CS3 status bit). Bit 1 - CS2_INT_EN - Enables the interrupt pin to be asserted if a touch is detected on CS2 (associated with the CS2 status bit). TABLE 6-21: CALIBRATION ACTIVATE REGISTER ADDR R/W Register B7 B6 B5B4 B3B2B1 B0 Default 26h R/W Calibration Activate -- CS6_ CAL CS5_ CAL CS4_ CAL CS3_ CAL CS2_ CAL CS1_ CAL 00h TABLE 6-22: INTERRUPT ENABLE REGISTER ADDR R/W Register B7 B6 B5 B4 B3 B2 B1 B0 Default 27h R/W Interrupt Enable -- CS6_ INT_EN CS5_ INT_EN CS4_ INT_EN CS3_ INT_EN CS2_ INT_EN CS1_ INT_EN 3Fh |
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