On the F29H85X-SOM-EVM, a BAW oscillator (Y1) provides a 25-MHz CMOS clock that is used by the F29H85x device. This clock is can also used as a source for the ECAT_PHY0_CLK and ECAT_PHY1_CLK outputs of the controlSOM. Figure 2-4 details the clock tree of the F29H85x controlSOM.

Figure 2-4 F29H85x controlSOM Clock Tree

The F29H85x device clock can be monitored through the GPIO219/XCLKOUT pin. This pin is connected to TP13 on the board. The XCLKOUT feature must be enabled through software. For more information on XCLKOUT, refer to the F29H85x and F29P58x Real-Time Microcontrollers Technical Reference Manual.