Luke, take a look at J400, 3 pin 0.1" header next to the FPGA….it's nominally for a debug UART for engineering work, currently unused in the production RTL. This would be an easier header to work with for a simple external T/R switch than the MICTOR debug header.Another alternative is the GPSDO socket if you are not using it…there are serial UART lines to that also that you could redefine in the RTL. -Ian Ralph,
Are you familiar at all with the B2x0? I don't have the device with me at the moment, but I see a debug header on the schematic (J502). Do you know if that can be used as a GPIO with some VHDL mods? I'm wondering if I could control the switch using that.
-Luke
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