This part is a kind of semiconductor called SiI9573.

Function of this product has Port Processor.

Manufacturers : Lattice

Image and pinout :

Some of the text within the PDF file :

SiI9573 and SiI9575 Port Processor Data Sheet SiI-DS-1089-F March 2016 SiI9573 and SiI9575 Port Processor Data Sheet Contents 1. General Description ..7 1.1. HDMI Inputs and Outputs .7 1.2. Performance Improvement Features 8 1.3. Audio Inputs and Outputs .8 1.4. Control [ ... ]

SiI9573 PDF Datasheet Download