Capture Control Register. The CCR controls which edges of the capture inputs are used to load the Capture Registers and whether or not an interrupt is generated when a capture takes place.
Match Register . MR can be enabled through the MCR to reset the TC, stop both the TC and PC, and/or generate an interrupt every time MR matches the TC.
Match Shadow Register . If enabled, the Match Register will be automatically reloaded with the contents of this register whenever the TC is reset to zero.
Prescale Counter. The 32 bit PC is a counter which is incremented to the value stored in PR. When the value in PR is reached, the TC is incremented and the PC is cleared. The PC is observable and controllable through the bus interface.