|Bit Index||Default||Access Type||Description|
Set to 1 to arm performance counters. Counter starts after the Control register Run bit is set.
Set to 0 to halt performance counters.
Write 1 to clear performance counters.
Automatically stop performance counters when a descriptor with the stop bit is completed. Automatically clear performance counters when the Control register Run bit is set. Writing 1 to the Performance Monitor Control register Run bit is still required to start the counters.