CAP1114 datasheet(69/102 Pages) MICROCHIP

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

SMSC CAP1114

Revision 1.1 (02-04-11)

DATASHEET

Note 6.3

If the repeat rate for the slider is set at 105msec or lower, the 11b case will use the fixed

values of 140, 105 and 70msec, respectively.

6.32

Digital Recalibration Control Register

The Digital Recalibration Control Register forces channels to perform a digital calibration as if there

were no base count. When a bit is set, the corresponding Capacitive Touch Sensor will be re-calibrated

and the bit will be automatically cleared once the re-calibration routine has finished. This calibration

routine will update the base count for touch detection.

Bit 7 - GP_D_CAL - Forces the grouped sensors to perform a digital recalibration as if there were no

base count.

Bit 6 - CS7_D_CAL - Forces CS7 to perform a digital recalibration as if there were no base count.

Bit 5 - CS6_D_CAL - Forces CS6 to perform a digital recalibration as if there were no base count.

Bit 4 - CS5_D_CAL - Forces CS5 to perform a digital recalibration as if there were no base count.

Bit 3 - CS4_D_CAL - Forces CS4 to perform a digital recalibration as if there were no base count.

Bit 2 - CS3_D_CAL - Forces CS3 to perform a digital recalibration as if there were no base count.

Bit 1 - CS2_D_CAL - Forces CS2 to perform a digital recalibration as if there were no base count.

Bit 1 - CS1_D_CAL - Forces CS1 to perform a digital recalibration as if there were no base count.

Table 6.48 RPT_SCALE Bit Decode

NUMBER OF SENSORS IN

100MSEC

REPEAT RATE (MSEC)

RPT_SCALE[1:0]

>=5

435

335

105

140

RPT_RATE_SL

Table 6.49 Digital Recalibration Control Register

ADDR

R/W

DEFAULT

3Fh

R/W

Digital

Recalibration

Control

GP_

D_CAL

CS7_

D_CAL

CS6_

D_CAL

CS5_

D_CAL

CS4_

D_CAL

CS3_

D_CAL

CS2_

D_CAL

CS1_

D_CAL

00h

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