A more specialised variant that's also quite common is the "window watchdog" peripheral, which is similar to the timer version, but will also trigger a reset if the keep-alive signal arrives too early, as well as too late.
It can be useful where you've got a mainloop doing some very predictably timed activities, and allows detection of faults which cause your watchdog servicing to occur too frequently.
I think it's quite common in DSP and things like motor control, where you often have hard realtime requirements and things happening too soon is just as bad as too late.
It can be useful where you've got a mainloop doing some very predictably timed activities, and allows detection of faults which cause your watchdog servicing to occur too frequently.
I think it's quite common in DSP and things like motor control, where you often have hard realtime requirements and things happening too soon is just as bad as too late.