Open drain & Use of pull up resistor in i2c.

[lpcware]

Content originally posted in LPCWare by jayudhandha on Thu Sep 25 22:23:13 MST 2014
Hello,

I am not able to understand the use of pull up resistor in i2c. I am using LPC 1769 ,icrocontroller.
And what is open drain?

Regards.. :-)

[lpcware]

Content originally posted in LPCWare by mc on Fri Sep 26 09:00:00 MST 2014
Hi Jay,
I suggest you to read below links.
http://www.i2c-bus.org/how-i2c-hardware-works/
http://www.i2c-bus.org/termination-versus-capacitance/
http://en.wikipedia.org/wiki/Open_collector

And for more detail study check i2C the specifications doc at
http://www.nxp.com/documents/user_manual/UM10204.pdf