CAP1298 datasheet(34/68 Pages) MICROCHIP

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CAP1298

DS00001571B-page 34

 2013-2015 Microchip Technology Inc.

5.8

Sensor Input Configuration Register

The Sensor Input Configuration Register controls timings associated with the capacitive sensor inputs.

Bits 7 - 4 - MAX_DUR[3:0] - (default 1010b) - Determines the maximum time that a sensor pad is allowed to be touched

until the capacitive touch sensor input is recalibrated (see Section 4.4.3, "Delayed Recalibration"), as shown in Table 5-

14.

Bits 3 - 0 - RPT_RATE[3:0] - (default 0100b) Determines the time duration between interrupt assertions when auto

repeat is enabled (see Section 4.9.2, "Capacitive Sensor Input Interrupt Behavior"). The resolution is 35ms and the

range is from 35ms to 560ms as shown in Table 5-15.

TABLE 5-13:

SENSOR INPUT CONFIGURATION REGISTER

Addr

R/W

B5B4B3B2B1

Default

22h

R/W

Sensor Input

Configuration

MAX_DUR[3:0]

RPT_RATE[3:0]

A4h

TABLE 5-14:

MAX_DUR BIT DECODE

MAX_DUR[3:0]

Time before Recalibration

560ms

840ms

1120ms

1400ms

1680ms

2240ms

2800ms

3360ms

3920ms

4480ms

5600ms (default)

6720ms

7840ms

8906ms

10080ms

11200ms

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