The Digital Blocks DB-I2C-S-APB / DB-I2C-S-AHB / DB-I2C-S-AXI / DB-I2C-S-AVLN Controller IP Core interfaces an ARM, MIPS, PowerPC, ARC,NIOS II or other high performance microprocessor via the AMBA APB or AHB or AXI-Lite or Altera Avalon System Interconnect Fabric to an I2C Bus. The I2C is a two-wire bidirectional interface standard (SCL is Clock, SDA is Data) for transfer of bytes of information between two or more compliant I2C devices, typically with a microprocessor behind the master controller and one or more master / slave or slave devices.