I am just wondering if there is any way to program an AVR via the ISP interface, while it's reset pin is connected to an external WDT ic.
I am using the MAX823 watchdog ic and the AT90CAN32 uC. I have connected the MAX823 open drain output to the uC's reset pin and the WDI (WDT timer reset) pin to the uC's PB1(SCK) pin. Also, between the MAX823 reset output and uC's reset input, there is a jumper that is open circuit while the microcontroller is been programmed via the ISP.
I have tested to program the uC while it's reset pin is connected to the external WDT, but this is impossible.
I have also tried to find an ApNote from ATMEL, but nothing.
Do you have any experiense on this?