13.15.3.8 Deadman Timer Reset (DMTR)

A Deadman Timer (DMT) Reset is generated when the DMT count has expired.

The primary function of the DMT is to Reset the processor in the event of a software malfunction. The DMT is a free-running instruction fetch timer, which is clocked whenever an instruction fetch occurs until a count match occurs. Instructions are not fetched when the processor is in the Sleep mode.

The DMT consists of a 32-bit counter with a time-out count match value as specified by the DMTCNT[4:0] bits in the CFGCON2 Configuration register.

A DMT is typically used in mission critical and safety critical applications, where any single failure of the software functionality and sequencing must be detected. For more information on the DMT reset, see Deadman Timer (DMT) from Related Links.