This part is a kind of semiconductor called STC11F02E.

Function of this product has single-chip 8-bit micro-controller.

Manufacturers : STC Technology

Image and pinout :

Some of the text within the PDF file :

www.DataSheet.co.kr STC Technology Co.,Ltd. STC11F02 Family STC11F01E/02E/04E/06 Features ........................................................................................................................... 3 General Description ....................................................................................................... 4 Order Information: .......................................................................................................... 4 Pin Definition ............................................................................................................ 5 Pin Configuration ...................................................................................................... 6 Special Function Register ............................................ [ ... ]

STC11F02E PDF Datasheet Download