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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

32

1

0

00

0

0

35ms

00

0

1

70ms

0

0

1

0

105ms

0

0

1

1

140ms

0

1

0

0

175ms

0

1

0

1

210ms

0

1

1

0

245ms

0

1

1

1

280ms (default)

1

0

0

0

315ms

1

0

0

1

350ms

1

0

1

0

385ms

1

0

1

1

420ms

1

1

0

0

455ms

1

1

0

1

490ms

1

1

1

0

525ms

1

1

1

1

560ms

TABLE 6-17:

AVERAGING AND SAMPLING CONFIGURATION REGISTER

ADDR

R/W

Register

B7

B6

B5

B4

B3

B2

B1

B0

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

21

0

00

0

1

00

1

2

01

0

4

0

1

1

8 (default)

10

0

16

10

1

32

11

0

64

1

1

1

128