CAP1293 datasheet(30/63 Pages) MICROCHIP

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CAP1293

DS00001566B-page 30

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• ‘0’ (default) - If low frequency noise is detected by the analog block, the delta count on the corresponding channel

is set to 0. Note that this does not require that Noise Status bits be set.

• ‘1’ - A touch is not blocked even if low frequency noise is detected.

Bit 3 - MAX_DUR_EN - Determines whether the maximum duration recalibration is enabled.

• ‘0’ (default) - The maximum duration recalibration functionality is disabled. A touch may be held indefinitely and no

recalibration will be performed on any sensor input.

• ‘1’ - The maximum duration recalibration functionality is enabled. If a touch is held for longer than the MAX_DUR

bit settings (see Section 5.8), the recalibration routine will be restarted (see Section 4.4.3, "Delayed Recalibra-

tion").

5.6.2

CONFIGURATION 2 - 44H

Bit 6 - BC_OUT_RECAL - Controls whether to retry analog calibration when the base count is out of limit for one or more

sensor inputs.

• ‘0’ - When the BC_OUTx bit is set for a sensor input, the out of limit base count will be used for the sensor input.

• ‘1’ (default) - When the BC_OUTx bit is set for a sensor input (see Section 5.17, "Base Count Out of Limit Regis-

ter"), analog calibration will be repeated on the sensor input.

Bit 5 - BLK_PWR_CTRL - Determines whether the device will reduce power consumption while waiting between con-

version time completion and the end of the sensing cycle.

• ‘0’ (default) - The device will reduce power consumption during the time between the end of the last conversion

and the end of the sensing cycle.

• ‘1’ - The device will not reduce power consumption during the time between the end of the last conversion and the

end of the sensing cycle.

Bit 4 - BC_OUT_INT - Controls the interrupt behavior when the base count is out of limit for one or more sensor inputs.

• ‘0’ (default) - An interrupt is not generated when the BC_OUT bit is set (see Section 5.2, "Status Registers").

• ‘1’ - An interrupt is generated when the BC_OUT bit is set.

Bit 3 - SHOW_RF_NOISE - Determines whether the Noise Status bits will show RF Noise as the only input source.

• ‘0’ (default) - The Noise Status registers will show both RF noise and low frequency noise if either is detected on a

capacitive touch sensor input.

• ‘1’ - The Noise Status registers will only show RF noise if it is detected on a capacitive touch sensor input. Low fre-

quency noise will still be detected and touches will be blocked normally; however, the status bits will not be

updated.

Bit 2 - DIS_RF_NOISE - Determines whether the RF noise filter is enabled. Setting this bit disables the feature.

• ‘0’ (default) - If RF noise is detected by the analog block, the delta count on the corresponding channel is set to 0.

Note that this does not require that Noise Status bits be set.

• ‘1’ - A touch is not blocked even if RF noise is detected.

Bit 1 - ACAL_FAIL_INT - Controls the interrupt behavior when analog calibration fails for one or more sensor inputs (see

Section 4.4, "Sensor Input Calibration").

• ‘0’ (default) - An interrupt is not generated when the ACAL_FAIL bit is set (see Section 5.2, "Status Registers").

• ‘1’ - An interrupt is generated when the ACAL_FAIL bit is set

Bit 0 - INT_REL_n - Controls the interrupt behavior when a release is detected on a button (see Section 4.9.2, "Capac-

itive Sensor Input Interrupt Behavior").

• ‘0’ (default) - An interrupt is generated when a press is detected and again when a release is detected and at the

repeat rate (if enabled - see Section 5.12).

• ‘1’ - An interrupt is generated when a press is detected and at the repeat rate but not when a release is detected.

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