User Manual
UM_8430_005  78Q8430 Driver Manual for ST5100/OS-20 with NexGen TCP/IP Stack 
Rev. 1.0    5 
1 Introduction 
The Teridian Semiconductor Corporation (TSC) 78Q8430 is a single chip 10/100 Ethernet MAC and PHY 
controller supporting multi-media offload. The device is optimized to enhance throughput and offload 
network protocol tasks from the host processor for demanding multi-media applications found in Set Top 
Boxes, IP video, and Broadband Media Appliances. 
This document describes the 78Q8430 software device driver for ST/OS-20. The document is based on 
the following driver software version: 
¾  SW Revision TSC8430B_V1.01, 03/07/2008. 
A 78Q8430 Demo Board (D8430T3B_STEM) is available to support development of embedded 
applications in conjunction with an ST STi5100 IPSTB development platform and ST ST20R2.0.5 SW 
tools. The 78Q8430 ST/OS-20 device driver includes the operating system (OS) and platform 
independent files and the OS and platform (CPU, board) dependent files. The ST/OS-20 device driver 
uses a specific configuration of the OS and platform which is dependent on the generic Teridian Ethernet 
device driver. This driver runs on the STi5100 IPSTB hardware platform with the NexGen TCP/IP 
protocol stack for IP video streaming demo application software. 










