Is it possible to set the output voltage of USB-8451 I2C ports to 1.8V ?

[Chen-Chi]

Dear All,

        As title. Is it possible to set the output voltage of USB-8451 I2C ports to 1.8V ? How ? THANKS A LOT for your help !!

[smercurio_fc]

Not according to the specifications. Why would you want to? Doing so doesn't adhere to the I2C spec.

[Chen-Chi]

Since most of our IP design uses core voltage (0.75V or 0.9V), it means if we want to use USB-8451 to configure the test chip, we need to either add IO buffer inside the test chip or use external level shifter to translate votlage levels between the USB-8451 and the test chip. It would be great if the USB-8451 can support an output voltage close to 1V or below. 

[crossrulz]

I know the USB-8452 supports multiple voltage levels, but the USB-8451 does not. Based on the specification, the USB-8452 can support down to 1.2V logic.