Modified DDS functions as baud-rate generator

摘要

You can often use an available oscillator to generate a baud-rate clock for a UART. You must divide the oscillator frequency to attain the proper baud rate, but dividing can produce baudrate errors. Table 1 shows the percentage of error when you generate a baud rate using an 8-MHz crystal oscillator and a conventional binary divider. The system in this Design Idea obtains a clock 16 times faster than the baud rate.