CAP1208 datasheet(49/67 Pages) MICROCHIP

49 / 67 page

8-Channel Capacitive Touch Sensor

Datasheet

 2014 Microchip Technology Inc.

DS00001570B-page 49

inputs universally (though individual sensor inputs can be configured to support recalibration - see

Section 5.11).

Note 5.1

Recalibration Samples refers to the number of samples that are measured and averaged

before the Base Count is updated however does not control the base count update period.

Note 5.2

Update Time refers to the amount of time (in sensing cycle periods) that elapses before

the Base Count is updated. The time will depend upon the number of channels enabled,

the averaging setting, and the programmed sensing cycle time.

5.19

Sensor Input Threshold Registers

Table 5.31 CAL_CFG Bit Decode

CAL_CFG[2:0]

RECALIBRATION

SAMPLES (SEE

Note 5.1)

UPDATE TIME (SEE

Note 5.2)

64 (default)

128

256

1024

256

2048

256

4096

Table 5.32 Sensor Input Threshold Registers

ADDR

R/W

DEFAULT

30h

R/W

Sensor Input 1

Threshold

-64

40h

31h

R/W

Sensor Input 2

Threshold

-64

40h

32h

R/W

Sensor Input 3

Threshold

-64

40h

33h

R/W

Sensor Input 4

Threshold

-64

40h

34h

R/W

Sensor Input 5

Threshold

-64

40h

35h

R/W

Sensor Input 6

Threshold

-64

40h

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