STM32F030 datasheet: Misleading VDDA vs VDD sequencing description?

Andrew Neil · ‎2025-10-30

Split from: Power Supply for STM32F030 Cortex TSSOP20 VDDA and VDD pin; specifically this post.

@TDK wrote:
that satisfies the condition.

But only the "VDDA >= VDD" condition - it doesn't satisfy the "VDDA must be first" condition.

As noted, I suspect that the 2nd condition is incorrectly stated; I guess it should say, "VDD must not come after VDDA" or similar ?

@TDK wrote:
That is the most common configuration.

Indeed it is!

@fredy - you could check out some ST board schematics to verify ...

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

Andrew Neil · ‎2025-10-30

@mƎALLEm Can the misleading datasheet wording be flagged for clarification?

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

mƎALLEm · ‎2025-10-30

@Andrew Neil wrote:

@mƎALLEm Can the misleading datasheet wording be flagged for clarification?

Do you mean the statement "must be provided first" ?

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

Andrew Neil · ‎2025-10-30

@mƎALLEm wrote:
Do you mean the statement "must be provided first" ?

Yes.

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

mƎALLEm · ‎2025-10-31

Hello @Andrew Neil ,

Thank you for your contribution. Reported internally for analysis and eventual fix. Internal ticket number 220882.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

Andrew Neil · ‎2025-10-31

Thanks.

It also occurs in other datasheets; eg,

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

mƎALLEm · ‎2025-10-31

Yes unfortunately it could be spread in many other datasheets!

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.