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PSoC 5, using SWD pins for UART RX/TX. | Cypress Semiconductor

PSoC 5, using SWD pins for UART RX/TX.

Summary: 2 Replies, Latest post by ngohara on 01 Sep 2015 02:07 PM PDT
Verified Answers: 1
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ngohara's picture
36 posts

I am working on a project with a CY8C5868-AXI-LP035 (also used in the 5LP module for CY8CKIT-001), 

This project has the real estate for only one port. So I am trying to use an USB micro connector (which has 5 pins). 

This allows me to connect a MiniProg 5pin conn appropriately  to the PSoC  for programming.

​With proper routing, this leaves the USB data pins (2 & 3)  tied to  the PSoC SWD pins (15.6 & 15.7).


What I am trying to do now is use the USB data pins as a UART signal to a PC (ie a terminal or script program). 

However PSoC Creator 3.2 will not allow me to manually route pins 15.6 and 15.7 to the  UART Tx and Rx pins,

even when I choose System settings  Debug Select = GPIO,  Enable Device Protection = Yes. 

(Which is supposed to free the SWD pins for GPIO).


Can anyone suggest how I get Creator to use this pins for UART communication?


Additionally, on the CY8CKIT-001, are there any other contact points for the J9 USB connector other than the two white loop testpoints for Dp and Dm? I haven't found any ports that I can plug into...



Thanks for any advice.



user_14586677's picture
7646 posts

This might help -      AN72382 - Using PSoC® 3 and PSoC 5LP GPIO Pins


Attached fixed pin constraints.


Regards, Dana.

ngohara's picture
36 posts

Thank you for the advice.

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