This part is a kind of semiconductor called BR24L01A-W.

Function of this product has I2C BUS EEPROM.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Datasheet Serial EEPROM Series Standard EEPROM I2C BUS EEPROM (2-Wire) BR24Lxxx-W Series (1K 2K 4K 8K 16K 32K 64K) ●General Description BR24Lxxx-W series is a serial EEPROM of I2C BUS interface method ●Features „ Completely conforming to the world standard I2C BUS. All controls available by 2 ports of serial clock (SCL) and serial data (SDA) „ Other devices than EEPROM can be connected to the same port, saving microcontroller port „ 1.8V to 5.5V *1 single power source action most suitable for battery use „ Page write mode useful for initial value write at factory shipment „ Highly reliable connection by Au pad and Au wire „ Auto erase and auto end function at data write „ Low current consumption ¾ At write operation (5V) : 1.2mA (Typ.) *2 ¾ At read operation (5V) [ ... ]

BR24L01A-W PDF Datasheet Download