This part is a kind of semiconductor called STC15W4K56S4.

Function of this product has MCU.

Manufacturers : STC MCU

Image and pinout :

Some of the text within the PDF file :

STC15W4K32S4 series MCU Data Sheet CONTENTS Chapter 1 General Overview of STC15W4K32S4 series..12 1.1 Introduction of STC15W4K32S4 series MCU.. 12 1.2 Block diagram of STC15W4K32S4 series MCU.. 15 1.3 Pin Configurations of STC15W4K32S4 series MCU... 16 1.4 STC15W4K32S4 series Selection and Price Table... 21 1.5 Naming rules of STC15W4K32S4 series MCU 22 1.6 Application Circuit Diagram for ISP of STC15W4K series... 23 1.6.1 Application Circuit Diagram for ISP using RS-232 Converter 23 1.6.2 Application Circuit Diagram for ISP using USB to convert Serial Port.. 24 1.6.3 Application Circuit Diagram f [ ... ]

STC15W4K56S4 PDF Datasheet Download