Need help finding a I2C chip

[MAXPAYNE]

Is there any I2C chip available which will do the following functions as attached image ?

 

[cks3976]

Can you please elaborate ? This is a MUX, but what an I2C bus doing here ?

 

[MAXPAYNE]

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

 

[cks3976]

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.

 

[KlausST]

Hi,

a simple I/O port could do this.
Like PCA9536DP.
Then you have two spare I/O pins.
you can control four line as I/O individually.

Klaus

 

[syenidogan]

Is there any I2C chip available which will do the following functions as attached image ?

you are using 2 pins and with two pins you can do 4 state. so what is the idea using extra compenent to do the same thing ?

 

[MAXPAYNE]

you are using 2 pins and with two pins you can do 4 state. so what is the idea using extra compenent to do the same thing ?

because in those two pins which will carry I2C data, there are other slave devices connected.

 

[milan.rajik]

Google for I2C 4 input MUX or I2C Multiplexer.

 

[paulfjujo]

a simple PORT output 8 bits
ex: PCF8754 .. use only A0 A1
i2C value => Binary value

 

[Easyrider83]

Pins marked as 'A' is address pins. Port expanders using I/O pins as input and output. Here should be some misunderstanding I suppose.

 

[MAXPAYNE]

I just marked them as A. They could be anything. whatever they are, all are output.

 

[paulfjujo]

Pins marked as 'A' is address pins. Port expanders using I/O pins as input and output. Here should be some misunderstanding I suppose.

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