USB-C PD Analyzer-Tool used in AN5225 ?

AWack · ‎2026-03-04

Hi,

in AN5225 an anylzer is used (e.g. Fig 22, page 33). Can anyone tell me which analyzer it is?

Best regards,

Achim

FBL · ‎2026-03-11

Figure 22 is a conceptual timing diagram, not output of an automatic tool. It is intended to illustrate the USB‑PD sink behavior and GPIO activity over time. It's describing the behavior of the STM32G0 Discovery kit USB Type‑C analyzer as called in Figure 9.

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Best regards,
FBL

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mƎALLEm · ‎2026-03-04

Hello,

I’m not sure but that seems to be a representation from an excel screenshot.

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Andrew Neil · ‎2026-03-04

@mƎALLEm beat me to it, but it also looks to me like someone just getting creative with Excel ?

(other spreadsheets are available)

@AWack Note that you can give a link to a specific page in an online PDF by adding #page=n at the end of the URL; eg,

https://www.st.com/resource/en/application_note/an5225-introduction-to-usb-typec-power-delivery-for-stm32-mcus-and-mpus-stmicroelectronics.pdf #page=33

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 · ‎2026-03-04

Less probable that’s a live usb signal acquisition on excel. That’s more a theoretical drawing on excel to show what should happen in real.

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Andrew Neil · ‎2026-03-04

Yes, that's what I mean by "someone just getting creative with Excel" - just using Excel as a drawing tool.

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.

FBL · ‎2026-03-11

Hi @AWack

Figure 22 is a conceptual timing diagram, not output of an automatic tool. It is intended to illustrate the USB‑PD sink behavior and GPIO activity over time. It's describing the behavior of the STM32G0 Discovery kit USB Type‑C analyzer as called in Figure 9.

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.

Best regards,
FBL

Andrew Neil · ‎2026-03-13

@Andrew Neil wrote:
"someone just getting creative with Excel" - just using Excel as a drawing tool.

You can get very creative with Excel; eg, I just saw this today:

LOL !

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.