How is it possible to achieve fast serial baud rate of
115200,230400,460800,921600? I was trying to communicate with the PC at these rates. Using a 20MHz clock frequency is not possible due to deviation errors? What actually affects the desired baud rate, and how do I achieve this common PC standards??
These crystal frequencies are commonly available. I never bothered to calculate higher baud rates because of OS support issues and stability problems. USB is the way to go for improved speed.
18,432,000 is a good all-round frequency (18,432,000 = 300, 600, 1200,
2400, 4800, 9600, 19200) but I prefer 22,118,400, you can easily get quite a few of the common baud rates from it (22,118,400 = 300, 600,
1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 38400, 57600,
115200).
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