We are using MPC5675K micro-controller and codewarrior 10.6 as the software development IDE.
During boot-up we are printing the last reset cause by reading RGM_FES(Functional event status) and RGM_DES(Destructive event status) registers.
Internal Watch dog timer is enabled and an ISR is registered for the WDT event for debug prints. Internal watch dog timer over flow was simulated and is working. The values from RGM_FES and RGM_DES are 0x4180 and 0x0000 respectively.
Some times the controller resets without triggering the WDT ISR. Both RGM_FES and RGM_DES are found to have the same values i.e 0x4180 and 0x0000 respectively.
Is this still a internal watchdog reset? Help us to find the reason of reset. Is there any other way to find root cause of reset?