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HD3SS3220: I2C pull high voltage of the 3220UFP-LEVM schematic

Part Number: HD3SS3220

Tool/software:

when i use the 3220UFP_LEVM, why the I2C(SDA/SCL)pin is pull high to 5V.

in the datasheet, the operation voltage of I2C should be 1.8/3.3V