> Does anyone have any experience in this area? Could the omission of the > RESET pullup be having some bad effect, like causing communication errors > that result in the long turnaround times?
PDI is a synchronous system if there is a lot of skew between PDI_CLK (the reset pin) and PDI_DATA you might get what you are seeing. I always put a 10k pull up on Reset (to lower its impedance increase noise immunity not related to PDI), and a 100k pull down on PDI_DATA, as well as making sure the CLK/DATA lines are matched in length (timing skew and capacitance) in the layout, and fixtures, as much as practical. Has worked fine so far on all my XMega boards. However I have not tried to use the Dragon yet. _______________________________________________ AVR-chat mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/avr-chat
