CAP1014 datasheet(45/84 Pages) SMSC

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

SMSC CAP1014

Revision 1.65 (08-11-09)

DATASHEET

‘0’ - The maximum duration recalibration functionality is disabled. A press may be held indefinitely

and no re-calibration will be performed on any button.

‘1’ (default) - The maximum duration recalibration functionality is enabled. If a press is held for

longer than the MAX_DUR_B bit settings, then the re-calibration routine will be restarted (see

Section 5.16).

APPLICATION NOTE: If the RPT_EN_B bit is updated while a touch is present on a button, then no changes will

be made to the interrupts until that button has been released.

Bit 2 - RPT_EN_B - Determines the interrupt mechanism used when a press is detected on a non-

grouped sensor (button)

‘0’ - An interrupt will be generated when a touch is detected and again when a release is detected.

‘1’ (default) - An interrupt will be generated when a touch is detected and at the programmed repeat

rate so long as the button is pressed.

Bit 1 - MAX_DUR_EN_G - Determines whether the maximum duration recalibration is enabled for

grouped sensors.

‘0’ (default) - The maximum duration recalibration functionality is disabled. A press may be held

indefinitely and no re-calibration will be performed on any button.

‘1’ - The maximum duration recalibration functionality is enabled. If a press is held for longer than

the MAX_DUR_G bit settings, then the re-calibration routine will be restarted (see Section 5.18).

Bit 0 - RPT_EN_G - Determines the interrupt mechanism used when a Press and Hold event is

detected on a grouped sensor

‘0’ (default) - An interrupt will be generated when a Press and Hold event is detected.

‘1’ - An interrupt will be generated when a Press and Hold event is detected and at the programmed

repeat rate so long as the sensor is pressed.

5.15

Sensor Enable Registers

The Sensor Enable registers determine whether a Capacitive Touch Sensor input is included in the

sampling cycle. The length of the sampling cycle is not affected by the number of sensors measured.

Bit 7 - G_EN - Enables all Capacitive Touch Sensors that are grouped to be included during the

sampling cycle.

‘0’ - None of the The grouped sensors are included in the sampling cycle.

‘1’ (default) - All of the grouped sensors are included in the sampling cycle.

Bit 6 - S7_EN - Enables the CS7 input to be included during the sampling cycle.

‘0’ - The CS7 input is not included in the sampling cycle.

‘1’ - The CS7 input is included in the sampling cycle.

Bit 5 - S6_EN - Enables the CS6 input to be included during the sampling cycle.

Bit 4 - S5_EN - Enables the CS5 input to be included during the sampling cycle.

Bit 3 - S4_EN - Enables the CS4 input to be included during the sampling cycle.

Bit 2 - S3_EN - Enables the CS3 input to be included during the sampling cycle.

Table 5.21 Sensor Enable Registers

ADDR

R/W

DEFAULT

21h

R/W

Sensor Enable

G_EN

S7_EN

S6_EN

S5_EN

S4_EN

S3_EN

S2_EN

S1_EN

FFh

CAP1014 Datasheet(PDF) 45 Page - SMSC Corporation

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