CAP1106 datasheet(27/48 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS00001624B-page 27

CAP1106

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.

Bits 3 - 2 - SAMP_TIME[1:0] - Determines the time to take a single sample as shown in Table 6-19.

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

TABLE 6-18:

AVG BIT DECODE

AVG[2:0]

Number of Samples Taken per

Measurement

8 (default)

128

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