Solon,
Check out Philip Semiconductors sight.  They are the "owners" of the I2C bus.  They have many datasheets explaining the operation of it.  If I remeber correctly you have to go to the section on microcontrollers on Philip Semiconductors web sight for the datasheets.

Steve

-----Original Message-----
From:   Solon Caceres Moreno [SMTP:cdmb@MULTINET.COM.CO]
Sent:   Monday, March 16, 1998 5:54 PM
To:     PICLIST@MITVMA.MIT.EDU
Subject:        the I2C bus Theory & def

PIC's:

Please, What is the I2C bus?

Thanks

Solon Caceres Moreno
Ingeniero de Sistemas UIS
Bucaramanga, Colombia
e-mail: solca@usa.net
              cdmb@multinet.com.co