| ??? 04/04/05 19:15 Read: times |
#90991 - baud rate tolerances Responding to: ???'s previous message |
Andy Neil said:
Note that Keil recommends a error of less that 1% in the actual baud rate:
http://www.keil.com/c51/baudrate.asp So, for a example, for a nominal 9600 baud, your actual value needs to be between 9504 and 9696. 1% seems pretty conservative; some Dallas documentation states 3% tolerance, and I have seen 4% mentioned on this forum before. Of course, the best option is a "magic oscillator" whose frequency gives you error-free baud rates for most of the common PC serial port speeds, but that is not always possible. I know I have squeaked by before with greater than 1% error without a problem. And this of course, so many different opinions raises the question, what is the actual tolerance limit? Any ideas? --Sasha Jevtic |
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| Whats the baud rate? Is it PC compatible | 01/01/70 00:00 | |
| Baud rate error | 01/01/70 00:00 | |
| baud rate tolerances | 01/01/70 00:00 | |
| some thoughts | 01/01/70 00:00 | |
| Baud rate errors | 01/01/70 00:00 | |
| baud rate errors/2 | 01/01/70 00:00 | |
| How about this? | 01/01/70 00:00 | |
| Serial Timing | 01/01/70 00:00 | |
| additional error | 01/01/70 00:00 | |
| plausible | 01/01/70 00:00 | |
| Oops! | 01/01/70 00:00 | |
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| More on cables | 01/01/70 00:00 | |
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| Exactly | 01/01/70 00:00 | |
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| Some How!! | 01/01/70 00:00 | |
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| Unspecific English | 01/01/70 00:00 | |
| Platform-Specific Line Termination | 01/01/70 00:00 | |
| Extra Line | 01/01/70 00:00 | |
| Lines, Platforms, and dead-end threads | 01/01/70 00:00 |