How to read 0x0X000000 reset value for a register ? Hexadecimal numbers only go as far as F does it mean that those four bytes have random reset values? Ref manual RM0399 page 587.

[HTess.1]

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[Peter BENSCH]

Welcome, @Community member​, to the community!

We are sorry that in RM0399, section 13.3 (SYSCFG registers) we neglected to include the explanation:

‘X’ correspond to PC3, PC2, PA1 and PA0 switch open bit reset value (PXnSO). PXnSO reset value is 0 when the corresponding PXn_C pin is available on the package but PXn is not, otherwise it is 1.

You can find the pins in the respective data sheets by searching for "(1)" and "(2)" and the corresponding footnotes by searching for "Pxy".

Does it answer your question?

Regards

/Peter

@Amel NASRI​:

@Sara BEN HADJ YAHYA:​ 

This also applies to RM0433.

[Amel NASRI]

Thanks @Peter BENSCH​  for highlighting this issue.

This is tracked internally and should be fixed in coming versions of RM0433 & RM0399.

Internal ticket number: 126727 (This is an internal tracking number and is not accessible or usable by customers).

-Amel

[HTess.1]

Yes, it does answer my question.

Thank you very much for your help!