Funny statement in STM32C071 datasheet

[gbm]

Section 3.20: "It requires a precise 48 MHz clock that is generated from the internal high-speed
external clock source"

So we have "internal external" clock source. ;)

[Andrew Neil]

So it does!

https://www.st.com/resource/en/datasheet/stm32c071kb.pdf#page=28 

[SofLit]

Hello @gbm ,

Thank you for your comment, I'm checking internally and getting back to you as soon as I have a feedback.

Ticket number for follow-up: 194454.

[SofLit]

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@Andrew Neil wrote:

So it does!

https://www.st.com/resource/en/datasheet/stm32c071kb.pdf#page=28 

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I think there is something missing in the statement. There are two possible clock sources: HSIUSB48 and HSE.

[Andrew Neil]

So what they mean is, "HSE or HSIUSB48":

https://www.st.com/resource/en/reference_manual/rm0490-stm32c0-series-advanced-armbased-32bit-mcus-stmicroelectronics.pdf#page=115

[Andrew Neil]

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@SofLit wrote:
I think there is something missing in the statement. There are two possible clock sources: HSIUSB48 and HSE.

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Yes, it does mention the two:

"It requires a precise 48 MHz clock that is generated from the internal high-speed
external clock source or by the internal 48 MHz oscillator in automatic trimming mode"

So

1. "the internal high-speed external clock source"  is (meant to be) HSE;
2. "the internal 48 MHz oscillator in automatic trimming mode" is HSIUSB.

I guess what they meant to say was something like, "HSE routed internally" ?

[Simon.T]

Hello @gbm ,

Indeed, the word "internal" is a typo. The right sentence would be:  "It requires a precise 48 MHz clock that is coming from a high-speed external clock (from an external source or an oscillator) or by the internal 48 MHz oscillator in automatic trimming mode."

This typo will be fixed for the next document revision. Thanks for spotting this typo, and enjoy the STM32C071 !

Best regards,

Simon