The I²C-master core is a modified version of the OpenCores I²C-Master where the WISHBONE interface has been replaced with an AMBA APB interface. The core is compatible with Philips I²C standard and supports 7- and 10-bit addressing. Standard-mode (100 kb/s) and Fast-mode (400 kb/s) operation are supported directly.
For more information, please see the GRLIB IP Core User's Manual
Estimation of the resource utilization for the I²CMST can be found here: