3.3.4 Measurement Clock Frequency

The device performs touch measurement using the clock defined by Measurement Clock Frequency. Reducing this clock increases the measurement time. You may use this parameter to ensure that the sensor electrodes are fully charged when using CSD is exhausted. It is possible to use 1 MHz or 500 kHz as touch measurement frequency. Refer to the section Steps To Configure Measurement Clock Frequency and CSD for more information on tuning MCLKFREQ.

The measurement clock frequency can be configured per channel by writing the value in the MCLKFREQ[n] register. Refer to the Configuration Summary sections for more information.

Steps to Configure Measurement Clock Frequency

  1. Write the value in the MCLKFREQ[n] register to configure Measurement Clock Frequency.
  2. Save (Optional)
    • This save option will help to retain the values after the device is reset (or) rebooted. Otherwise, this step is optional.