Document IMX8MMRM-i.MX 8M Mini Applications Processor Reference Manual, Rev 1, 03/2019 states that CCM_CLKO[2:1] can be connected to pads GPIO1_IO[14:15] (p. 1231). The signals are shown on page 262 as coming out of the CCM.
However, I cannot find the description for CCM_CLKO[2:1]. Could you let me know what this signal is? I am hoping it may be a clock output from the SoC.
The CCM_CLKO pins are indeed lacking documentation but while these refer to an output for clocks it is not recommended to drive external devices as CCM_CLKO is designed only for monitoring on this processor.
My apologies for the inconvenience and thank you for pointing out the lack of information on the documentation!
The CCM_CLKO signal does usually refer to a clock output for off-chip devices. However, I will escalate with our experts so they can confirm this and to add this information on the next release of the documentation.