Pin mux tables in K60P144M150 Reference Manual and Datasheet don't show FB_CLKOUT...

[stevenmartin]

In the 144 pin 100MHz K60, the FB_CLKOUT signal could be muxed out on PTC3 as ALT5.  In the K60P144M150, the FB_CLKOUT doesn't appear in either the reference manual (Rev 2) or the datasheet (Rev 4).  The ref manual shows PTC3-ALT5 as undefined and the datasheet shows it as CLKOUT (as in system clock out, same as PTA6-ALT5).  Where is FB_CLKOUT now?  Are both docs wrong?

[apanecatl · Accepted solution]

Hi Steven, as Norm mentioned, the FB_CLKOUT signal is assigned to pin 106 /  / PTC3, there is a small error in the device's datasheet where the pins is shown as the system CLKOUT, you can confirm the FB signal configuration in the TWR-K60F120M schematic page 4:

http://cache.freescale.com/files/32bit/hardware_tools/schematics/TWR-K60F120M-SCH.pdf

[ndavies]

There has been extra functionality added to the CLK_OUT pin. It can be routed out through PTC3-ALT5. However you can now select which clock is passed out of CLK_OUT pin. It is controlled through the SIM register SOPT2. The default clock_out function is FB_CLKOUT.

I'm using the flex bus with the CLKOUT pin configured for the flexbus clock.