31.2 Embedded Characteristics

The Power Management Controller provides the following clocks:

Host Clock (MCK), programmable from a few hundred Hz to the maximum operating frequency of the device. It is available to the modules running permanently, such as the Enhanced Embedded Flash Controller
Processor Clock (HCLK), automatically switched off when entering the processor in Sleep mode
Free-running processor Clock (FCLK)
The Cortex-M7 SysTick external clock
USB Clock (USB_48M), required by the USB peripheral
Peripheral Clocks with independent ON/OFF control, provided to the peripherals
Programmable Clock Outputs (PCKx), selected from the clock generator outputs to drive the device PCK pins
Clock sources independent of MCK and HCLK, provided by internal PCKx for USART, UART, TC, Embedded Trace Macrocell (ETM) and CAN Clocks
Generic Clock (GCLK) with controllable division and ON/OFF control, independent of MCK and HCLK. Provided to selected peripherals.

The Power Management Controller also provides the following features on clocks: