Copyright © 2010 Atmel Corporation
The cycle counter is a COUNT register, that increments once every clock. The count register can be used together with the COMPARE register to create a timer with interrupt functionality. The COMPARE register holds a value that the COUNT register is compared against. When the COMPARE and COUNT registers match, a compare interrupt request is generated and COUNT is reset to 0.
See drivers in /cycle_counter and an example.
The MPU allows the user to divide the memory space into different protection regions. These regions have a user-defined size and start at a user-defined address. The different regions can have different access privileges attributes. You can also read the Memory Protection Unit section in the AVR32 UC technical reference guide.
See drivers in /mpu and an example.
The Secure State allows execution of secure or secret code alongside 3rd-party code on the same processor. The secret code will execute in the secure state, and therefore be protected from hacking or readout by the 3rd-party code. Recommended reading: the Secure State chapter in the AVR32 UC Technical Reference manual.
See drivers in /secure_state and an example.
See drivers avr32_reset_cause.h and an example in /services/basic/cpu/reset_cause_example.