STM32H7 Nucleo-144 boards: erroneous STDC14 pin descriptions in UM2407

[KasDev]

Title edited to clarify that STM32H7 Nucleo-144 boards is the subject.

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Table 5 on Page 20 of UM2407 contains erroneous info on the STDC14 connector. I am very sure that the descriptions for STDC14 pins 8 and 12 are wrong, maybe others aswell.

[mƎALLEm]

Hello @KasDev and welcome to the  ST community,

So what errors you've detected in Table 5? please provide details.

Thank you

[Andrew Neil]

So this:

Yes ?

So, as @mƎALLEm said, what do you think is wrong, and why?

PS:

It seems to match the STDC14 pinout shown in the STLink-V3SET manual:

https://www.st.com/resource/en/user_manual/um2448-stlinkv3set-debuggerprogrammer-for-stm8-and-stm32-stmicroelectronics.pdf#page=24

[KasDev]

According to the designation column, pin 6, 8 and 12 are targeting JTMS(T_JTMS), JTDO(T_JTMS) and JTMS(T_JTMS) respectively. As far as i know that is wrong, as you are not supposed to connect them all to T_JTMS and pin 12 needs to be connected to NRST for JTAG to be able to force reset during debugging to regain control of the MCU. I mean i know i could just follow the CN5 column of the table, but the designation column confused me alot.

Edit: when talking about pin numbers im looking at the pin numbers in the column stdc14.

[Andrew Neil]

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@KasDev wrote:

According to the designation column, pin 6, 8 and 12 are targeting JTMS(T_JTMS), JTDO(T_JTMS) and JTMS(T_JTMS) respectively. .

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8 & 12 are both T_JTMS, but 6 is T_JCLK:

So it does look like 8 is wrong?

Have you checked the schematic?

[KasDev]

A jumped in the columns, i meant 4, 8 and 12.

[Andrew Neil]

Have you checked the schematic?

[KasDev]

No, i just copied this from a colleagues schematic who claimed it worked in the past and moved on.

Just wanted to give you a heads up.

[mƎALLEm · Accepted solution]

Hello,

I think how this it should be:

While pin 4 description is correct

Internal ticket for follow-up 224078.