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Sample code to set/display the date/time from a Microchip MCP7941x. Ian Chilton <firstname.lastname@example.org> 08/11/2011 The MCP79411 is an I2C RTC chip which also includes 1K of EEPROM, 64 bytes of SRAM and a Unique ID. There are 3 flavours of the MCP7941x, which differ in the Unique ID content: MCP79410 - Blank MCP79411 - EUI-48 Mac Address MCP79412 - EUI-64 Mac Address The chip uses an I2C address of 0x57 for the EEPROM and 0x6f for the RTC and SRAM (the Wire library takes care of adding a LSB for read/write selection)