"The Memec Design MC-XIL-TWSI core is an industry standard two-wire serial interface supporting multiple masters. This core operates as a master or a slave. This core does not support 10-bit slave addressing or START byte data transfers.
Device Family Support
Virtex-II Pro
Virtex-II
Virtex-E
Virtex
Spartan-3
Spartan-IIE
Spartan-II
Spartan
Key Features
I2C-compatible two-wire serial interface core (I2C is a trademark of Philips, Inc.)
Multi-master operation with arbitration and clock synchronization
Slave transmit and receive operation
Support for reads, writes, burst reads, burst writes, and repeated start
User defined timing and clock frequency
Fast and standard operation modes"