i have a problem with the AVRISP in case of programming the flash.
It works on some COM ports fine but on others i got an error message when AVRStudio is trying to programm the flash.
obviously the problem has something to do with the rs232 transmit signal which comes out of the AVRISP. the signal looks a little bit strange with a very slow falling edge and this obviously causes a problem on some UART's in the PC.
does anyone has a shematic of this part so i can see, how the transmit signal is generated?
many thanks in advance