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There are no differences between the (A0 vs. A1) devices for both the Programming and Peripheral UARTs.
What are the symptoms of not-working? Doesn't work at all? Drops some characters?
Are you using code from the Hardware Interfaces document, something from the SDK contents, or something you created?
On the 20732A0, I download the code, remove the USB, from the mini-switches on the board I flip the two switches so data can be displayed on the console. I replace the USB, then I can see output, and input keystrokes.
On the 20732A1, I follow the exact same steps, but there is no output and I can't input data; But if I flip the switches back (without disconnecting the USB), I see output, put I can't input anything?
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I likewise have sent a private message with detailed instructions on who to contact regarding this version of the BCM20732 SOC.