1060 datasheet(25/35 Pages) MICROCHIP

25 / 35 page

AT42QT1060 [DATASHEET]

9505H–AT42–04/2015

Setting Up Procedures

Set the number of keys required by

leaving the SNS pins unconnected in

unused keys.

Determine whether a change in the

corresponding bit in the detection

status register generates a transition

on the CHG line.

[Address 24: Key Mask]

Determine which keys are in the AKS

group.

[Address 25: AKS Mask]

Determine the number of

measurements that must be

confirmed as having passed the key

threshold before that key is registered

as being in detect.

[Address 30: Detection Integrator]

To Set Up Keys

Tune the sensitivity of the keys by

adjusting the value of the sampling

capacitor, Cs and the negative

threshold (NTHR)

[Address 16 – 21: NTHR]

Determine the direction of the I/O

lines. If any lines are unused, set

them to be outputs and leave them

unconnected.

[Address 23: I/O Mask]

Determine which I/Os that are

configured as outputs will be

controlled by their corresponding

capacitive key.

[Address 27: Detection Mask]

To Set Up I/O Lines

Determine which I/Os that are

configured as outputs will output a

PWM signal.

[Address 26: PWM Mask]

Determine the active logic level for the

I/Os that are configured as outputs.

[Address 28: Active Level Mask]

Determine the output level for the I/Os

that are configured as outputs.

[Address 29: User Output Buffer]

Determine the duty cycle of the PWM

output signal.

[Address 31: PWM Level]

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