Suppose you send an I2C value, for that specific value, the output will be A0=0, A1=0
then you send another specific value , for that specific value, the output will be A0=0, A1=1
The output of A0 and A1 logic condition will be changed based on the I2C value at the input
Fine.. then this cannot be a simple MUX.. and also I am not sure if any COTS device exist to perform this logic. You may have to have a small programmable device with a look-up table that can output various A&B combinations on the output based on the I2C Data. You cannot use a simple MUX because the I2C clock is not a periodic signal.
you are right...
i notice A0 and A1 as Output corresponding to the request .
right definition is P0 P1
because but there are also Pin A0 A1 A2 to define offest adresse of PCF8574