The device provides several system clock outputs. Summary of these output clocks are as follows:
- MCU_SYSCLKOUT0
- MCU_SYSCLKOUT0 is the MCU domain system clock (MCU_SYSCK0) divided-by-4. This clock output is provided for test and debug purposes only.
- MCU_OBSCLK0
- Observation clock output for test and debug purposes only.
- SYSCLKOUT0
- SYSCLKOUT0 is the MAIN domain system clock (MAIN_SYSCLK0) divided-by-4. This clock output is provided for test and debug purposes only.
- CLKOUT0
- CLKOUT0 is the Ethernet subsystem clock (MAIN_PLL0_HSDIV4_CLKOUT) divided-by-5 or divided-by-10. This clock output was provided to source to the external PHY. When configured to operate as the RMII Clock source (50MHz) the signal must also be routed back to the RMII_REF_CLK pin for proper device operation.
- OBSCLK0
- Observation clock output for test and debug purposes only.
- GPMC_FCLK_MUX
- GPMC_FCLK_MUX is the GPMC0 functional clock (GPMC_FCLK). This clock is provided as an alternative GPMC interface clock when attached devices require a continuous running clock.
For more information, see Clock Outputs section in Clocking chapter and GPMC Clock Configuration section in Peripherals chapter in the device TRM.