CAP1208 datasheet(51/67 Pages) MICROCHIP

51 / 67 page

8-Channel Capacitive Touch Sensor

Datasheet

 2014 Microchip Technology Inc.

DS00001570B-page 51

5.21

Standby Channel Register

The Standby Channel register controls which (if any) capacitive touch sensor inputs are enabled in

Standby (see Section 4.3.1.2, "Standby State Sensing Settings").

For all bits in this register:



‘0’ (default) - The specified channel will not be monitored in Standby.



‘1’ - The specified channel will be monitored in Standby. It will use the standby threshold setting,

and the standby averaging and sensitivity settings.

Bit 7 - CS8_STBY - Controls whether the CS8 channel is enabled in Standby.

Bit 6 - CS7_STBY - Controls whether the CS7 channel is enabled in Standby.

Bit 5 - CS6_STBY - Controls whether the CS6 channel is enabled in Standby.

Bit 4 - CS5_STBY - Controls whether the CS5 channel is enabled in Standby.

Bit 3 - CS4_STBY - Controls whether the CS4 channel is enabled in Standby.

Bit 2 - CS3_STBY - Controls whether the CS3 channel is enabled in Standby.

Bit 1 - CS2_STBY - Controls whether the CS2 channel is enabled in Standby.

Bit 0 - CS1_STBY - Controls whether the CS1 channel is enabled in Standby.

5.22

Standby Configuration Register

The Standby Configuration register controls averaging and sensing cycle time for sensor inputs

enabled in Standby. This register allows the user to change averaging and sample times on a limited

number of sensor inputs in Standby and still maintain normal functionality in the Active state.

Bit 7 - AVG_SUM - Determines whether the sensor inputs enabled in Standby will average the

programmed number of samples or whether they will accumulate for the programmed number of

samples.



‘0’ - (default) - The Standby enabled sensor input delta count values will be based on the average

of the programmed number of samples when compared against the threshold.



‘1’ - The Standby enabled sensor input delta count values will be based on the summation of the

programmed number of samples when compared against the threshold. Caution should be used

with this setting as a touch may overflow the delta count registers and may result in false readings.

Table 5.35 Standby Channel Register

ADDR

R/W

DEFAULT

40h

R/W

Standby

Channel

CS8_

STBY

CS7_

STBY

CS6_

STBY

CS5_

STBY

CS4_

STBY

CS3_

STBY

CS2_

STBY

CS1_

STBY

00h

Table 5.36 Standby Configuration Register

ADDR

R/W

DEFAULT

41h

R/W

Standby

Configuration

AVG_

SUM

STBY_AVG[2:0]

STBY_SAMP_

TIME[1:0]

STBY_CY_TIME

[1:0]

39h

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