nrf5340 I2C operation at 5V

[Rahul Wagh]

Hi,

We are working with nrf53-DK evaluation board, and we are using P1.02\P1.03 pins for I2C communication.

We wanted to connect a 5V I2C slave on these lines can we connect 5V I2C slave.

As per the nrf5340 datasheet if it is powered at 3.3V then all the GPIO pins should be connected to 3.3V.

If it is possible please let us know.

[Vidar Berg]

Hi,

This will exceed the Absolute maximum ratings  for the chip and it may cause damage internally on the chip. If the slave needs to operate on 5V, you will need to place a level-shifter between to translate the IO levels.

Best regards,

Vidar