I am planning to use temp sensor part TMP451HQDQWRQ1 with STM32F303ZET6. This sensor is SMBA based. Where to connect SCL & SDA from sensor to MCU? I can see below 4 pins in MCU, I2C2_SMBA I2C3_SMBA I2C1_SMBA I2C2_SMBA Please help.

[KJ.4]

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[Peter BENSCH]

SMBA (SMB Alert) is an additional function to SMB. So you would have to set both SDA and SCL for the desired SMB channel (I2C), as well as the corresponding SMBA pin.

You have found the SMBA for I2C2 twice, because on the STM32F303ZET it is either on PB12 or on the alternative pin PA8.

Does it answer your question?

Regards

/Peter