Default clock speed for Nucleo-8s208RB

[MykolaLevun]

Hello

What clock frequency and timing scheme is used for Nucleo-8S208RB default? In what documentation can I look this up?

In the documentation (UM2364 User manual) for the board NUCLEO-8S208RB, this information is written (see picture), but looking at the board, I understand that none of these schemes (see picture) are used by default. Or did I look wrong and it’s still being used?

[Peter BENSCH · Accepted solution]

By default, MCO is used by ST-LINK.

Unfortunately, UM2364 is incorrect at this point, the correct value is in section 6.7, block MCO, first bullet point:

• SB14 = OFF, SB13 = OFF

In the schematics of the NUCLEO-8S208RB you will find the T_MCO network, which is connected to the OSCIN of the STM8S208RBT6 via SB15 and feeds the 8MHz from the MCO output of the ST-LINK into the STM8. For this reason, SB14 is also not set because PA1 is already used as the OSCIN function and otherwise the 8MHz signal would also be output at CN1.23.

Is that clearer now?

Regards
/Peter

[MykolaLevun]

The link you provided does not work. It says "This page is not working right now."

[Peter BENSCH]

Website problems should be temporary. Please try again a little later and check the CAD Resources tab if necessary.

[MykolaLevun]

The explanations are clear. Schemes also found on the CAD Resources tab, thank you.