This part is a kind of semiconductor called VC0706.

Function of this product has Serial Port Debug User Manual.

Manufacturers : VIMICRO

Image and pinout :

Some of the text within the PDF file :

VC0703 串口调试工具使用说明 V1.00 VC0706 Serial port debug User’s manual Version 1.00 2008.02.29 Notes1: The information is subject to change without notice. Before using this document, please confirm that this is the latest version. Notes2: Not all products and/or types are available in every country. Please check with a Vimicro sales representative for availability and additional information. Page 1 of 36 VC0706 Vimicro Corporation Important Notice All rights about this document belong to Vimicro Corporation (here after, refer as Vimicro). All rights are reserved. Vimicro and its subsidiaries reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or servic [ ... ]

VC0706 PDF Datasheet Download