CAP1293 datasheet(20/63 Pages) MICROCHIP

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CAP1293

DS00001566B-page 20

 2013-2015 Microchip Technology Inc.

4.9.3

INTERRUPTS FOR THE POWER BUTTON

Interrupts are automatically enabled for the power button when the feature is enabled (see Section 4.6, "Power Button").

A touch must be held on the power button for the designated period of time before an interrupt is generated.

4.9.4

INTERRUPTS FOR MULTIPLE TOUCH PATTERN DETECTION

An interrupt can be generated when the MTP pattern is matched (see Section 5.15, "Multiple Touch Pattern Configura-

tion Register").

4.9.5

INTERRUPTS FOR SENSOR INPUT CALIBRATION FAILURES

An interrupt can be generated when the ACAL_FAIL bit is set, indicating the failure to complete analog calibration of

one or more sensor inputs(see Section 5.2, "Status Registers"). This interrupt can be enabled by setting the ACAL_-

FAIL_INT bit (see Section 5.6, "Configuration Registers").

FIGURE 4-4:

SENSOR INTERRUPT BEHAVIOR - REPEAT RATE ENABLED

FIGURE 4-5:

SENSOR INTERRUPT BEHAVIOR - NO REPEAT RATE ENABLED

Touch Detected

INT bit

Button Status

Write to INT bit

Sensing Cycle

(35ms)

Min Press Setting

(280ms)

Interrupt on

Touch

Button Repeat Rate

(175ms)

Button Repeat Rate

(175ms)

Interrupt on

Release

(optional)

ALERT# pin

Touch Detected

INT bit

Button Status

Write to INT bit

Sensing Cycle

(35ms)

Interrupt on

Touch

Interrupt on

Release

(optional)

ALERT# pin

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