Reset reason for atmega 32u4

[dr pepper]

Is there a register within this chip I can read to determine the cause of the reset.
I want to determine a power on reset from a brownout reset.

 

[FvM]

You want to look for MCU Control and Status Register MCUCSR

 

[dr pepper]

Thanks I found it, but didnt you mean MCUSR.
Arduino IDE recognizes MCUSR and can just be read into a variable, and the 6 causes of a reset can easily be determined.
I expected it to be harder somehow.

 

[FvM]

It's named MCUCSR in my ATmega32 datasheet.