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Irritating documentation for I2C1 Pins on NUCLEO WL55JC1

Forum|Forum|5 years ago
May 27, 2021
3 replies
2801 views

Hi!

I am currently trying to build a GPS sensor that communicates over I2C with the nucleo Board, but i'm not sure about the documentation.

So I started a new CubeMX Project based on the NUCLEO WL55JC1 and, according to the software (as shown in pic 1), the I2C1 Pins are PA10 (SDA) and PB8 (SCL).

However, according to the manual the pins should be PA11 and PA12, wich would be pin 9 and 10 on the CN5 connector (shown in pic 2).

So.. wich one's correct?

Thanks in advance!

This topic has been closed for replies.

Best answer by Imen.D

Hello @GHube.1 ,

in UM2592 rev1, Table 17: CN5 (Pin number 9 and 10) functions should be I2C2_SDA (PA11) and I2C2_SCL (PA12).

(not I2C1_SDA and I2C1_SCL as indicated).

I raised the typos internally for fix in the coming release of User manual UM2592.

Thanks for your contribution.

Imen

I

Imen.DBest answer

ST Technical Moderator

Hello @GHube.1 ,

in UM2592 rev1, Table 17: CN5 (Pin number 9 and 10) functions should be I2C2_SDA (PA11) and I2C2_SCL (PA12).

(not I2C1_SDA and I2C1_SCL as indicated).

I raised the typos internally for fix in the coming release of User manual UM2592.

Thanks for your contribution.

Imen

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks

GHube.1Author

Associate II

Thank you!

I

Imen.D

ST Technical Moderator

Hi @GHube.1 ,

Updates have been done on the new revision of the User manual UM2592 rev2.

Thanks

Imen

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks

LLr.1

Associate III

Hello, also here in the new version (rev2) : it's PB7 (SDA for I2C1)

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