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BQ76920EVM: SMBus communication

Part Number: BQ76920EVM
Other Parts Discussed in Thread: BQ76920, BQ78350-R1A, EV2400

HI TI Team,

I am using a custom board based on reference design of BQ76920 EVM, I am using BQ76920 as AFE connected to BQ78350-R1A device. 

The regout voltage of AFE is 2.5V. I am able to connect the board to battery management studio through EV2400 and am able to set cell connections as well as observe the variation in cell voltage in real time.

However, I have a doubt that If I want to use an external MCU to communicate with BQ78350-R1A on SMBus do I need any level shifter? WHat is the voltage level on the SMBC and SMBD pins?