4 ms·
There is no standard for this. UARTs are called universal because they can be configured to work with "any" asynchronous serial protocol (within their bounds),
by formerly_proven 2y ago
There is no standard for this.
UARTs are called universal because they can be configured to work with "any" asynchronous serial protocol (within their bounds), which usually means
- 1 start bit
- 5-9 data bits
- even or odd parity
- 1-2 or sometimes 3 stop bits
per frame. Hardware UARTs also typically oversample 16x, which is why simple software UARTs are often somewhat glitchy.
- actionfromafar 2y agoThe 5 bit data frame proved useful in the lab at uni where one of our tasks were to build a routable network over serial. :) Split each byte in 4-bit nibbles and used the remaining data bit for not-quite-in-band-signalling.
- wrs 2y agoSee, you called it “asynchronous serial protocol” there. But one can certainly think of asynchronous serial protocols that are outside those bounds. The Wikipedia article [0] calls this category “asynchronous start-stop signaling” but has no source. I guess the best term is “UART protocol”, despite the limited size of the “universe”, since it’s really just a de facto convention established by decades of chips called “UARTs”. [0] https://en.wikipedia.org/wiki/Asynchronous_serial_communication https://en.wikipedia.org/wiki/Asynchronous_serial_communicat...