CAP1114 datasheet(64/102 Pages) MICROCHIP

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

Revision 1.1 (02-04-11)

SMSC CAP1114

DATASHEET

Note 6.1

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

before the Base Count is updated.

Note 6.2

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

Base Count is updated.

6.28

Sensor Threshold Registers

The Sensor Threshold Registers store the delta threshold that is used to determine if a touch has been

detected. When a touch occurs, the input signal of the corresponding sensor changes due to the

Table 6.39 CAL_CFG Bit Decode

CAL_CFG[2:0]

RECALIBRATION

SAMPLES (SEE

Note 6.1)

UPDATE TIME (SEE

Note 6.2)

256

256 (default)

256

1024

256

2048

256

4096

256

7936

Table 6.40 Sensor Threshold Registers

ADDR

R/W

DEFAULT

30h

R/W

Sensor 1

Threshold

-64

40h

31h

R/W

Sensor 2

Threshold

-64

40h

32h

R/W

Sensor 3

Threshold

-64

40h

33h

R/W

Sensor 4

Threshold

-64

40h

34h

R/W

Sensor 5

Threshold

-64

40h

35h

R/W

Sensor 6

Threshold

-64

40h

36h

R/W

Sensor 7

Threshold

-64

40h

37h

R/W

Group

Threshold

-64

40h

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