This part is a kind of semiconductor called AN1816.

Function of this product has USING THE HC912B32 TO IMPLEMENT THE DISTRIBUTED SYSTEMS INTERFACE (DSI) PROTOCOL.

Manufacturers : Freescale Semiconductor

Image and pinout :

Some of the text within the PDF file :

Freescale Semiconductor Order this document by AN1816/D AN1816 Freescale Semiconductor, Inc... USING THE HC912B32 TO IMPLEMENT THE DISTRIBUTED SYSTEMS INTERFACE (DSI) PROTOCOL By Tracy McHenry August 1999 Introduction System design requirements are continually changing as systems become increasingly complex. In conventional systems where sensors and actuators are connected directly to a microcontroller (MCU), the number of pins available on the MCU limits system expansion. As a result, extra costs can be incurred if another MCU is required or if the hardware has to be redesigned to accommodate a higher pin count MCU. An alternative approach is to move to a distributed bus architecture. This option allows one master MCU to interconnect to many remote sensors and actuators. The Distribu [ ... ]

AN1816 PDF Datasheet Download