CAP1028 datasheet(45/71 Pages) SMSC

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8 Channel Capacitive Touch Sensor with 2 LED Drivers

Datasheet

SMSC CAP1028

Revision 1.1 (08-05-09)

DATASHEET

‘0’ - The interrupt pin will not be asserted if a touch is detected on CS8 (associated with the CS8

status bit).

‘1’ (default) - The interrupt pin will be asserted a touch is detected on CS8 (associated with the

CS8 status bit).

Bit 6 - CS7_INT_EN - Enables the interrupt pin to be asserted if a touch is detected on CS7

(associated with the CS7 status bit).

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).

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).

Bit 0 - CS1_INT_EN - Enables the interrupt pin to be asserted if a touch is detected on CS1

(associated with the CS1 status bit).

5.13

Repeat Rate Enable Register

The Repeat Rate Enable register determines the interrupt behavior of the buttons as described in

Section 4.6.1.

Bit 7 - CS8_RPT_EN - Enables the repeat rate for Capacitive Touch Sensor 8.

‘0’ - The repeat rate for CS8 is disabled. It will only generate an interrupt when a touch is detected

and when a release is detected no matter how long the touch is held for.

‘1’ (default) - The repeat rate for CS8 is enabled. In the case of a “touch” event, it will generate an

interrupt when a touch is detected and a release is detected. In the case of a “press and hold”

event, it will generate an interrupt when a touch is detected and at the repeat rate so long as the

touch is held. It will not generate an interrupt when a release is detected.

Bit 6 - CS7_RPT_EN - Enables the repeat rate for Capacitive Touch Sensor 7.

Bit 5 - CS6_RPT_EN - Enables the repeat rate for Capacitive Touch Sensor 6.

Bit 4 - CS5_RPT_EN - Enables the repeat rate for Capacitive Touch Sensor 5.

Bit 3 - CS4_RPT_EN - Enables the repeat rate for Capacitive Touch Sensor 4.

Bit 2 - CS3_RPT_EN - Enables the repeat rate for Capacitive Touch Sensor 3.

Bit 1 - CS2_RPT_EN - Enables the repeat rate for Capacitive Touch Sensor 2.

Bit 0 - CS1_RPT_EN - Enables the repeat rate for Capacitive Touch Sensor 1.

Table 5.20 Repeat Rate Enable Register

ADDR

R/W

B4B3B2B1B0

DEFAULT

28h

R/W

Repeat Rate

Enable

CS8_

RPT_EN

CS7_

RPT_EN

CS6_

RPT_EN

CS5_

RPT_EN

CS4_

RPT_EN

CS3_

RPT_EN

CS2_

RPT_EN

CS1_

RPT_EN

FFh

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