This is a AT24CXX breakout board, designed to allow the addition of an EEPROM (electrically erasable and programmable read only memory) chipset to your project. These memory chipsets are organised into 8192 words of 8 bits to be accessed through the common I2C interface.
Communication is handled through a 2 pin I2C interface, available on a wide range of microcontrollers. The I2C address of can be set by setting the A jumpers for addresses in the range of 0x50 – 0x57.
 
Pin Description:
VCC: 2.7 – 5.5V
SCL: Serial clock
SDA: Serial data
GND: 0V
Jumper Description:
WP: Write protect
A0 – 2: Device address