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NUCLEO-H755ZIQ 8MHz HSE instead of 25MHz?

Gustavo_AR
Associate II

I have several NUCLEO-H755ZI-Q boards, the documentation says that the clock coming out from STLINK should be 25MHz but I meassured STLK_MCO and found an 8MHz signal... on SB72 to be more precise.

The sticker on the boards say

NUCLEO-H755ZI-Q

NUH755ZIQ$AT3

I was having issues when using HSE as a clock source, because I was configuring it to 25MHz as stated in the documentation and as it defaults to in CUBEMX... The issues went away when I set it to 8MHz.

Under the microscope X1 crystal shows 25.000.

Is there something to configure on STLINK to get the 25MHz?

Could the board be fake?

1 REPLY 1
Pavel A.
Evangelist III

This is what the documentation says on the NUCLEO-H755ZI-Q HSE input from ST-LINK: 8 MHz.

PavelA_0-1725917586600.png