I have been using the PSoC5 for some CNC motion control applications. I was using the CY8CKIT-059 and was having trouble with some pins not working for stepper motor step generation. When looking at the schematic I saw that P0_2, P0_3,P0_4, and P3_2 have 1.0uF capacitors. See the attached schematic snippet.
I think those capacitors are killing my short (a few usecs) step pulses. I will probably remove the caps. I was wondering how much capacitance the I/O can handle before it is damaged. I could not find the spec in the datasheet.
BTW: If you are interested in CNC motion control on PSoC see my blog post.
The caps on the pins you mention have some sense. They stabilize Vref and support the capsense components with the required Cs. I would suggest you to choose some other pins for your CNC interface.