STM32U5 Traceclock

[Sebastian33]

Hello


I trying to figure out what the maximum frequency is for the TRACECLK  stm32u5A9.
I found this post for the stm32h5
https://community.st.com/t5/stm32-mcus-products/traceclk-freq-in-stm32h5/td-p/604127

does the same apply for stm32u5 were can i in that case find this information for stm32u5?

Are there any pcb layout guidlines for 
TRACECK
TRACED[3:0]

 

[KDJEM.1]

Hello @Sebastian33 ;

 

I reported this issue internally. I will get back to you with more details as soon as possible.

Internal ticket number: 225506 (This is an internal tracking number and is not accessible or usable by customers).

 

Thank you.

Kaouthar

[Viktor POHORELY]

TRACECLK is connected to SYSCLK/2.

Please note that GPIO AC characteristics must be respected - high capacitive load or low voltage may not allow maximum speed of the TRACECLK signal.

[FNiel.1]

And length from STM32U5 to Tracer will be aproximately 25 cm including the Segger cable.

Please advise if any line buffers are needed.

[FNiel.1]

I'm the hardware architect on this design. We are matching the impedance of the lines to the tracer connector to be 80Ohm. I assume that that fits the STM32 U5 drive impedance fairly well as this is the impedance of the Segger IDC cable?

We are also matching length as much as possible as per the Segger layout recomendations.