CAP1208 datasheet(43/67 Pages) MICROCHIP

43 / 67 page

8-Channel Capacitive Touch Sensor

Datasheet

 2014 Microchip Technology Inc.

DS00001570B-page 43

APPLICATION NOTE: Writing a ‘0’ to clear a ‘1’ may cause a planned calibration to be skipped, if the calibration

routine had not reached the sensor input yet.

5.12

Interrupt Enable Register

The Interrupt Enable register determines whether a sensor pad touch or release (if enabled) causes

an interrupt (see Section 4.8, "Interrupts").

For all bits in this register:



‘0’ - The ALERT# pin will not be asserted if a touch is detected on the specified sensor input.



‘1’ (default) - The ALERT# pin will be asserted if a touch is detected on the specified sensor input.

Bit 7 - CS8_INT_EN - Enables the ALERT# pin to be asserted if a touch is detected on CS8

(associated with the CS8 status bit).

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

(associated with the CS7 status bit).

Bit 5 - CS6_INT_EN - Enables the ALERT# pin to be asserted if a touch is detected on CS6

(associated with the CS6 status bit).

Bit 4 - CS5_INT_EN - Enables the ALERT# pin to be asserted if a touch is detected on CS5

(associated with the CS5 status bit).

Bit 3 - CS4_INT_EN - Enables the ALERT# pin to be asserted if a touch is detected on CS4

(associated with the CS4 status bit).

Bit 2 - CS3_INT_EN - Enables the ALERT# pin to be asserted if a touch is detected on CS3

(associated with the CS3 status bit).

Bit 1 - CS2_INT_EN - Enables the ALERT# pin to be asserted if a touch is detected on CS2

(associated with the CS2 status bit).

Bit 0 - CS1_INT_EN - Enables the ALERT# 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 enables the repeat rate of the sensor inputs as described in Section

4.8.2, "Capacitive Sensor Input Interrupt Behavior".

Table 5.21 Interrupt Enable Register

ADDR

R/W

DEFAULT

27h

R/W

Interrupt

Enable

CS8_

INT_EN

CS7_

INT_EN

CS6_

INT_EN

CS5_

INT_EN

CS4_

INT_EN

CS3_

INT_EN

CS2_

INT_EN

CS1_

INT_EN

FFh

Table 5.22 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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