Channel numbering when routing SNS and SNSK pins to different ports

When SNS and SNSK pins are available on different ports, the channel numbering follows the pin numbering in the ports selected.

  1. 1.

    The channel numbers follow the pin numbers starting with the LSB (pin 0 is channel 0 and pin 3 is channel 3).

  2. 2.

    Since the channel numbers are fixed to the pins of the SNS and SNSK ports, if the design calls for use of a subset of the pins available in the SNS and SNSK ports, the user has to skip the channel numbers of the unused SNS and SNSK pins.

For example, on a 4 channel configuration using SNS and SNSK ports, if pin 2 is not used for touch sensing ( on both SNS and SNSK ports), channel number 2 is unavailable and care should be taken while configuring the channels and sensors to avoid using this channel. Also, the SNS and SNSK masks are assigned properly as explained in section 7.5.2.2