The device provides several system clock outputs. Summary of these output clocks are as follows:
- MCU_CLKOUT0
- Reference clock output for Ethernet PHYs (50 MHz or 25 MHz)
- MCU_SYSCLKOUT0
- SYSCLK0 of WKUP_PLLCTRL0 is divided by 6 and then sent out of the device as a LVCMOS clock signal (MCU_SYSCLKOUT0). This signal can be used to test if the main chip clock is functioning or not.
- MCU_OBSCLK0
- On the clock output MCU_OBSCLK0, oscillators and PLLs clocks can be observed for tests and debug.
- SYSCLKOUT0
- SYSCLK0 from the MAIN_PLL controller is divided by 6 and then sent out of the device as a LVCMOS clock signal (SYSCLKOUT0). This signal can be used to test if the main chip clock is functioning or not.
- CLKOUT
- OBSCLK[2:0]
- On the clock output OBSCLK0, oscillators and PLLs clocks can be observed for tests and debug.