Hi Champion
My customer want to test TM4C129X UART receive condition if the baud rate have some small vibration.
They test in 115200 baud rate, use the PC to send data in fix115200 baud rate, and TM4C receive data near 115200, they want to modify the baudrate register to check in what baudrate that TM4C129X will get bit errors.
Customer also want to know whether TI M4 have this kind of data? how stable the baudrate should be garrentee to avoid bit errors.
Thank you!
Hi Eric,
115200 along with others such as 1200, 2400, 4800, 9600 and etc are the standard UART baud rates. The baud rate is calculated using the below equation as shown in the datasheet. With the 6-bit fractional divider the UART can achieve all standard baud rates. We don't have such data as to when the UART will start to detect bit error with non-optimal fractional divider values programmed. This can be subject to the operation conditions (voltage, temperature and whether the UART is in high speed mode with the HSE bit clear or not). The customer can vary the fractional divider value to test at which point UART starts to detect error.
