Significance of NMI pin in MPC56xxB controller

[manisham]

Hello All,

Please explain me the significance of NMI (to monitor Interrupt) Pin in the MPC56xB microcontroller, When and why it is used specifically.

In my requirement, input to this(NMI) pin is from an Interrupt pin of by another IC.

Expecting a quick response!

[davidtosenovjan]

Generally a non-maskable interrupt (NMI) is a hardware interrupt that cannot be ignored by standard interrupt masking techniques in the system. An NMI is often used when response time is critical or when an interrupt should never be disabled during normal system operation.

Typically output from other IC (other MCU, external watchdog, system basis chip and son on…) may be connected to this input - it is purely application dependent.

[raghavendrapura]

Hello David,

In our application we are using MCZ33905CD5EKR2 and INT bar pin is connected to NMI pin of 5606B. We would like to know the recommend behaviour in case this NMI pin is high. Any application note will be of great help.

Does this have any relation to hard or warm boot up?

Regards,

Raghavendra P