Bernie Boos

HCS12 to transmit SCI at 115200 baud

Discussion created by Bernie Boos on May 18, 2006
Latest reply on May 22, 2006 by no name
Hi everyone,
I am using an MC9S12A256B and would like to transmit on the serial line at 115200 bps. I am using a 6MHz crystal. From what I've read in a different forum, I will probably have to bump up my internal bus speed using the PLL to get this baud rate. Has anyone done this? Is there  a simple way to choose the PLL register values and the SCI divider values to get this baud? I was hoping to keep the bus clock as low as possible. I know I can bump it up to 48MHz and get the baud rate, but that draws a lot of current.