AVR-Chat

At 03:26 AM 5/03/2005, you wrote:

>was a problem that the connections aren't clear on the schematic ...
>like the pins CTS, Rx, Tx & RTS/DTR ...


It is rather unclear. The Rx and Tx pins from the level
shifter chip (Max232) go to the Rx and Tx pins of the 8535.
The RTS ans CTS pins (Hardware handshaking) can just be
shorted together. For J1 chose the RTS setting. This should
keep the PC happy and it should work. If you are going to
the trouble of buiding this programmer on Veroboard then I
would suggest again to use a similar programmer that uses
the 2313 because I do some (free) firmware upgrade from time to
time, even though the firmware should be reassemblable (?  :-))
for the 8535. Vasilis Serasidis has lots of info on his website
at www.serasids.gr




Regards

John Samperi

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