USB-UART Bridge pins?

Question

It seems most questions revolving around the USB-UART bridge are from instantiating the Zynq processing system.

However, I have a project with my own uart that I'm attempting to connect to the USB-UART bridge.

I'm trying to assign my RX/TX pins to C14/D11 (as dictated in the hardware user guide and schematic) in Vivado.
However, Vivado is complaining that C14/D11 are invalid placements.

I'm using the Rev D Zedboard

Former Member · Accepted Answer

Hi,

The Zynq C14 and D11 pins on the ZedBoard are 'MIO' pins which are for 'direct' connections to the Zynq PS (Processor System) and are not available to be driven from PL (Programmable Logic) sections. Take a look at chapter 2 of the Zynq Technical Reference Manual for details:

http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf

You could use a PMOD based USB-UART bridge such as this Digilent PMOD and route your custom uart signals to the PMOD connector:

http://avnetexpress.avnet.com/1/1/9993337-digilent-inc-210-212.html

-Gary