CAP1208 datasheet(44/67 Pages) MICROCHIP

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8-Channel Capacitive Touch Sensor

Datasheet

DS00001570B-page 44

 2014 Microchip Technology Inc.

For all bits in this register:



‘0’ - The repeat rate for the specified sensor input is disabled. It will only generate an interrupt when

a touch is detected and when a release is detected (if enabled) no matter how long the touch is

held.



‘1’ (default) - The repeat rate for the specified sensor input is enabled. In the case of a “touch”

event, it will generate an interrupt when a touch is detected and a release is detected (as

determined by the INT_REL_n bit - see Section 5.6, "Configuration Registers"). 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.

Bit 7 - CS8_RPT_EN - Enables the repeat rate for capacitive touch sensor input 8.

Bit 6 - CS7_RPT_EN - Enables the repeat rate for capacitive touch sensor input 7.

Bit 5 - CS6_RPT_EN - Enables the repeat rate for capacitive touch sensor input 6.

Bit 4 - CS5_RPT_EN - Enables the repeat rate for capacitive touch sensor input 5.

Bit 3 - CS4_RPT_EN - Enables the repeat rate for capacitive touch sensor input 4.

Bit 2 - CS3_RPT_EN - Enables the repeat rate for capacitive touch sensor input 3.

Bit 1 - CS2_RPT_EN - Enables the repeat rate for capacitive touch sensor input 2.

Bit 0 - CS1_RPT_EN - Enables the repeat rate for capacitive touch sensor input 1.

5.14

Multiple Touch Configuration Register

The Multiple Touch Configuration register controls the settings for the multiple touch detection circuitry.

These settings determine the number of simultaneous buttons that may be pressed before additional

buttons are blocked and the MULT status bit is set.

Bit 7 - MULT_BLK_EN - Enables the multiple button blocking circuitry.



‘0’ - The multiple touch circuitry is disabled. The device will not block multiple touches.



‘1’ (default) - The multiple touch circuitry is enabled. The device will flag the number of touches

equal to programmed multiple touch threshold and block all others. It will remember which sensor

inputs are valid and block all others until that sensor pad has been released. Once a sensor pad

has been released, the N detected touches (determined via the sensing cycle order of CS1 - CS8)

will be flagged and all others blocked.

Bits 3 - 2 - B_MULT_T[1:0] - Determines the number of simultaneous touches on all sensor pads

before a Multiple Touch Event is detected and sensor inputs are blocked. The bit decode is given by

Table 5.24.

Table 5.23 Multiple Touch Configuration

ADDR

R/W

DEFAULT

2Ah

R/W

Multiple Touch

Config

MULT_

BLK_

B_MULT_T[1:0]

80h

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