[SCI] Asynchronous Baud Register Values for Common SCI Bit Rates

Hi.

In the TMS320F2803x Technical Reference Manual there is a "12.12 SCI Baud Rate Calculations" section which describes Asynchronous Baud Register Values for Common SCI Bit Rates. But there is only few Ideal Baud rates described in the table. My question is about % of error. I want to have a 115200 baud rate but what will be the % of errors in this situation?

over 2 years ago

+1 Vince over 2 years ago

TI__Mastermind 19795 points

Hi WW,

Thanks for your question. Actual % error can vary drastically depending on the system, which is why we don't specify this. See this email thread:

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1160990/tms320f28384d-the-maximum-error-rate-of-sci-communication/4367321#4367321

If you're just wanting to see what the actual baud rate would be written into the register, you can use the formulas in the BAUDH/L registers to get your baud rate to BAUDH/L values. Then convert these values from BAUDH/L to baud rate to get the ACTUAL baud rate that you set.

Note in these formulas it depends on your LSPCLK value, so please keep that in mind.

Regards,

Vince

C2000™︎ microcontrollers

C2000 microcontrollers forum

[SCI] Asynchronous Baud Register Values for Common SCI Bit Rates