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DP83869HM: Selecting different values for CLK_OUT

Part Number: DP83869HM
Other Parts Discussed in Thread: DP83869

We are using a DP83869 in MII loopback mode.  Regardless of the CLK_O_SEL value written to IO_MUX_CFG Register (Address = 0x170), we see a 25Mhz clock on CLK_OUT.  I have seen two different threads in this support forum where it is recommended to write to register 0x00C6.  According to the datasheet for DP83869, this register does not exist.  I do see it in DP83867 datasheet for PLL Clock-out Control Register (PLLCTL).   Does register exist in DP83869 also?

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/894177/dp83869hm-is-clk_out-capable-of-generating-125mhz-from-internal-pll