8574  I2C 8-Bit-PIO 
8574A I2C 8-Bit-PIO 

8-Bit Input/Output-Baustein fŸr den I2C-Bus

	    __ __
	A0 |  V  | +5V
	A1 |     | SDA
	A2 |     | SCL
	P0 |     | /INT
	P1 |     | P7
	P2 |     | P6
	P3 |     | P5
	GND|_____| P4
	    
Selektionsadresse am I2C-Bus: 

8574:	%0100xxxr
8574A:	%0111xxxr

wobei xxx = A0-2
	r = r/w