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STM32L476 I2C open drain with VDDIO2

Question asked by Silas Valera on May 20, 2017
Latest reply on May 21, 2017 by KIC8462852 EPIC204278916



I am trying to use STM32L476 with several I2C devices, STM32L4 operates @3.3V whereas one of the I2C device is operating @1.8V - I need to avoid using level shifting hardware, there is provision of VDDIO2 and when used with I2C open drain configuration (w/o any pull up or pull down), I can connect this device directly to the I2C port. 


Can anyone help me how can I do that? Is there any sample schematic I can follow? Can anyone who has used this configuration tell me about his experience please?


Thanks for your help in advance