Effect on Baud with clock speeds

david_101 · Guest

hi,

I am trying to connect two processors via hardware UART, but they are working at different clock speeds, one is a DSP controller working at 150Mhz and the other is 18F pic working at 40Mhz. But both of them have their baud rates set to 9600 baud.

Will this work?

Thanks

Dave

Rohit de Sa · Joined: 09 Nov 2007 Posts: 282 Location: India

Yes it will work. As long as your DSP allows you to set the baud rate to 9600bps (which in all likelihood, it will), it should work without problems.

If you use UART hardware, a certain clock speed can support a minimum and a maximum baud rate. Going below or above these limits is not possible. Using software you can go below the minimum specified (typically using software delays).

Rohit