does trace clock divide by 2 ?

[stav]

I have adapted code for the K40 tower running in PEE mode at 96MHz. (from an external 8Mhz xtal) this is confirmed by register settings checked in debug and a correct baud rate on serial port. The freq of MCGOUT = system clock = 96Mhz. I measure 48Mhz on a scope at the trace output.

Does the trace output do an (undocumented ?) divide by 2?

Thanks!

[zeal]

Hi, a late reply but in this thread it is concluded that trace clock is half the core clock:

https://community.freescale.com/thread/89398

[pgo]

Dear stav,

I came to the same conclusion. I couldn't find any reference in the Kinetis documentation however some ARM documentation mentions a half-rate clock (option) for the traceclk.  The option is chosen by the implementor (Freescale).  I believe this is the case for the Kinetis devices.

bye