Supplemental facilities include debug unit for real - time debugging , high resolution tick timer , programmable interrupt controller and power management support 辅助功能包括用于实时调试的调试单元,高分辨率嘀哒计数器,可编程中断控制器和电源管理。
In computing, a programmable interrupt controller (PIC) is a device that is used to combine several sources of interrupt onto one or more CPU lines, while allowing priority levels to be assigned to its interrupt outputs. When the device has multiple interrupt outputs to assert, it asserts them in the order of their relative priority.