This part is a kind of semiconductor called STC12C5612AD.

Function of this product has MCU.

Manufacturers : STC

Image and pinout :

Some of the text within the PDF file :

STC12C5620AD series MCU STC12LE5620AD series MCU Data Sheet STC MCU Limited STC MCU Limited. Update date: 2011-7-15 CONTENTS Chapter 1. Introduction.7 1.1 Features... 7 1.2 Block diagram. 8 1.3 Pin Configurations . 9 1.4 STC12C5620AD series Selection Table11 1.5 STC12C5620AD series Minimum Application System... 12 1.6 STC12C5620AD series MCU Typical Application Circuit for ISP.. 13 1.6.1 STC12C [ ... ]

STC12C5612AD PDF Datasheet Download