CAP1203 datasheet(28/59 Pages) MICROCHIP

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DS00001572B-page 28

 2013-2015 Microchip Technology Inc.

5.7

Sensor Input Enable Register

The Sensor Input Enable register determines whether a capacitive touch sensor input is included in the sensing cycle

in the Active state.

For all bits in this register:

• ‘0’ - The specified input is not included in the sensing cycle in the Active state.

• ‘1’ (default) - The specified input is included in the sensing cycle in the Active state.

Bit 2 - CS3_EN - Determines whether the CS3 input is monitored in the Active state.

Bit 1 - CS2_EN - Determines whether the CS2 input is monitored in the Active state.

Bit 0 - CS1_EN - Determines whether the CS1 input is monitored in the Active state.

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-

12.

TABLE 5-10:

SENSOR INPUT ENABLE REGISTER

Addr

R/W

B5B4B3B2B1B0

Default

21h

R/W

Sensor Input

Enable

CS3_EN

CS2_EN

CS1_EN

07h

TABLE 5-11:

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 5-12:

MAX_DUR BIT DECODE

MAX_DUR[3:0]

Time before Recalibration

560ms

840ms

1120ms

1400ms

1680ms

2240ms

2800ms

3360ms

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