Honored Contributor
Honored ContributorI guess, the frame format is N-8-1, so no parity errors should be detected. It would be interesting however to enable parity and check for real transmission errors.
I don't use Altera SOPC components and am not aware of the UART implementation details like bit sampling method and framing. If the UART is used for other purposes than occasional debugging, I won't accept the error rate. As dsl suggested, you should calculate the actual baud rate achieved with your SOPC clock frequency. In some cases, the timing error margin can be increased by sending an additional stop bit from the peer.
