Question: Which debug port should I use in PSoC 3 and PSoC 5 devices?



PSoC 3 and PSoC 5 devices support debugging via both industry standard JTAG, or Single Wire Debug (SWD) interface. SWD offers a low pin-count debug solution (two pins versus four or five pins for JTAG), with the same functionality and speed of JTAG.  The SWD port must be selected to save number of pins used for debugging. If the user wants boundary scan, JTAG debug option should be used.