CAP1126 datasheet(38/73 Pages) MICROCHIP

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CAP1126

DS00001623B-page 38

 2015 Microchip Technology Inc.

6.9

Sensor Input Configuration 2 Register

Bits 3 - 0 - M_PRESS[3:0] - (default 0111b) - Determines the minimum amount of time that sensor inputs configured to

use auto repeat must detect a sensor pad touch to detect a “press and hold” event. If the sensor input detects a touch

for longer than the M_PRESS[3:0] settings, a “press and hold” event is detected. If a sensor input detects a touch for

less than or equal to the M_PRESS[3:0] settings, a touch event is detected.

The resolution is 35ms the range is from 35ms to 560ms as shown in Table 6-16.

6.10

Averaging and Sampling Configuration Register

The Averaging and Sampling Configuration register controls the number of samples taken and the total sensor input

cycle time for all active sensor inputs while the device is functioning in Active state.

Bits 6 - 4 - AVG[2:0] - Determines the number of samples that are taken for all active channels during the sensor cycle

as shown in Table 6-18. All samples are taken consecutively on the same channel before the next channel is sampled

and the result is averaged over the number of samples measured before updating the measured results.

For example, if CS1, CS2, and CS3 are sampled during the sensor cycle, and the AVG[2:0] bits are set to take 4 samples

per channel, then the full sensor cycle will be: CS1, CS1, CS1, CS1, CS2, CS2, CS2, CS2, CS3, CS3, CS3, CS3.

TABLE 6-15:

SENSOR INPUT CONFIGURATION 2 REGISTER

ADDR

R/W

Default

23h

R/W

Sensor Input

Configuration 2

M_PRESS[3:0]

07h

TABLE 6-16:

M_PRESS BIT DECODE

M_PRESS[3:0]

M_PRESS SETTINGS

35ms

70ms

105ms

140ms

175ms

210ms

245ms

280ms (default)

315ms

350ms

385ms

420ms

455ms

490ms

525ms

560ms

TABLE 6-17:

AVERAGING AND SAMPLING CONFIGURATION REGISTER

ADDR

R/W

Default

24h

R/W

Averaging and

Sampling Config

AVG[2:0]

SAMP_TIME[1:0]

CYCLE_TIME

[1:0]

39h

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