This part is a kind of semiconductor called ET1100.

Function of this product has Slave Controller.

Manufacturers : Beckhoff

Image and pinout :

Some of the text within the PDF file :

Hardware Data Sheet ET1100 Slave Controller Section I – Technology (Online at http://www.beckhoff.com) Section II – Register Description (Online at http://www.beckhoff.com) Section III – Hardware Description Pinout, Interface description, electrical and mechanical specification, ET1100 features and registers Version 1.9 Date: 2014-07-07 DOCUMENT ORGANIZATION DOCUMENT ORGANIZATION The Beckhoff EtherCAT Slave Controller (ESC) documentation covers the following Beckhoff ESCs:  ET1200  ET1100  EtherCAT IP Core for Altera® FPGAs  EtherCAT IP Core for Xilinx® FPGAs  ESC20 The documentation is organized in three sections. Section I and section II are common for all Beckhoff ESCs, Section III is specific for each ESC variant. The latest documentation is available at th [ ... ]

ET1100 PDF Datasheet Download