Datasheet

CY8C20xx6A/H CapSense Design Guide Doc. No. 001-65973 Rev. *A 46
The architecture of the CapSense controller imposes a restriction on current budget for even and odd port pin
numbers. An odd pin can be any port pin having an odd number as pin number. For a CapSense controller, if the
current budget of odd port pin is 100 mA, total current drawn though all odd port pins should not exceed 100 mA. In
addition to the total current budget limitation, there is also a maximum current limitation for each port pin that is
defined in the CapSense controller datasheet.
All CapSense controllers provide high-current sink and source capable port pins. When using high-current sink or
source from port pins, it is recommended to use the ports that are closest to device ground pin to minimize the noise.
5.7 PCB Layout Guidelines
Detailed PCB layout guidelines are available in Getting Started with CapSense.