Changing the default I2C address of STSAFE-A120

[LJimé.1]

Hi,

I would want to know the default I2C address of the STSAFE-A120 and if it is possible to change it, as it is done in the A110.

In addition, is there any documentation about the content of the STSAFE-A120 I2C registers?

Thank you in advance.

Regards,

Luis

[Benjamin BARATTE · Accepted solution]

Hi @LJimé.1 ,

The STSAFE-A120 I2C address is part of the customization, therefore, it's describe in the application note on the evaluation profile here

The default value is 0x20 on 7 bits.

Yes, this value is updatable as on STSAFE-A110.

The STSAFE-A120 is not based on registers. It's a frame based protocol. Therefore, the STSELib is here to manage the frame creation as an helper to your application.

You need to provide a simple send/receive I2C API to have it working on your device.

To update the I2C address, you have the command stse_put_i2c_parameters function.

Warning, once made an update of the I2C address, you will need to reset the STSAFE-A120 to apply the new I2C address and restart you STSELib handle with the new I2C address.

Best Regards,

Benjamin

[LJimé.1]

Hi Benjamin,

Thank you very much for your answer!

Regards,

Luis