C8051F989-GM View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

C8051F989-GM

Ultra Low Power, 8-2 kB Flash, Capacitive Sensing MCU

Silicon Laboratories 

C8051F99x-C8051F98x

8.13. Adjusting CS0 For Special Situations

There are several configuration options in the CS0 module designed to modify the operation of the circuit

and address special situations. In particular, any circuit with more than 500 ohms of series impedance

between the sensor and the device pin may require adjustments for optimal performance. Typical applica-

tions which may require adjustments include:

 Touch panel sensors fabricated using a resistive conductor such as indium-tin-oxide (ITO).

 Circuits using a high-value series resistor to isolate the sensor element for high ESD protection.

Most systems will require no fine tuning, and the default settings for CS0DT, CS0DR, CS0IA, CS0RP

and CS0LP should be used.

Rev. 1.0

105

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