In my plan of word domination the first goal was to make a led flash on a 12F629 and with help from you guys the led is flashing and so I pass on to the second goal: serial communication. Software USART did not work at all on the 12F629 and it looks like will be very hard to make it work. The choice of using the 12F629 was only on price and for some insane reason I was thinking that serial communication would be a piece of cake, now I believe that a chip with hardware USART will be a better choice and so I ask for help again. What PIC should I buy? The sales man says that 12F675, 12F509 and 12F683 all have hardware USART but I did not find any mention of it in the datasheet. Any recommendation of PIC model with hardware USART will be greatly appreciated. Uaca -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist