davef 
I have a mini2440 attached to 2 ATmega32U4 boards. The watchdog facility on the mini2440 does not appear to have the equivalent of a Watchdog system reset flag that I find on the AVR ATmega series. While I could reboot the mini2440, using its watchdog facility I also want to reset these two boards. After a search through watchdog issues I see that one solution might be an external watchdog chip. However, can anyone suggest a way of using the watchdog on the mini2440 (/dev/watchdog) to reset some external microcontrollers? Thanks, davef