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Altera_Forum's avatar
Altera_Forum
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9 years ago

UART issue

Greetings everyone, I'm working on an UART design (only the receiver), I followed an online pdf wich deals with the subject. I ended up with this following code : library ieee; use ieee....
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

This will be because rx_done_tick is an asynchronous signal. There will be a signel somewhere that changes slightly before the clock edge causing a glitch. This are a characteristic of asynchronous outputs. Its difficult to tell exactly what because you didnt provide a test bench and your image is too low a resolution.

The solutiuon would be to make all of the code synchronous - put it all in a synchronous process, and no glitches can be produced