hey, can some1 help me to interface PCF 8574 with 89c51 using I2C bus for interfacing LCD in four but mode please.. its for my final year project it will help me alot if any1 can help me out for the code.. coz im not able 2 get it done.. i dont understand it actually..
"im not able 2 get it done.. i dont understand it actually.."
You should admit this to your tutors immediately!
The whole point of a final year project is to demonstrate what you can do - so, if you can't do this, then you need to choose another project!
BTW: for an 89C51, you will need C51 - not C251.