According to the 8051 text book, in order to generate a standard baudrate used for serial rs232 coomunication, the XTAL frequency has to be 11.059MHZ. My current project uses a 14.318MHZ XTAL. Is there anyway I can get around this in order to generate a standard baudrate such as 9600 etc .... Thanks in advance Jimmy
"Well, if you have a c51 derivate that can be clocked that high... " Most new "advanced" derivatives will run at much more than 16Mhz. e.g. the Philips P89C51Rx2 will run at 20/6 or 33/12 Mhz. In the 6 clock mode, the prescaler is twice as long so you will have to calculate the baudrate with 40Mhz if you use a 20 Mhz crystal. Ha' en rar dag Erik
Yes, i know, I used to give an example of quartz who permit a good baudrate.