AN2282 Datasheet, PDF (1/19 Pages) STMicroelectronics – With the ever-increasing success

AN2282
APPLICATION NOTE
TCP/IP Over Ethernet Connectivity
with the STR710
Introduction
With the ever-increasing success of the Internet, many applications with networking features
are being developed making the TCP/IP protocol a global standard for communication both
for the Internet and local area networks. In a normal scenario, a microcontroller inside a
home appliance or process controller of an industrial distributed control system is not
directly connected to the Internet but instead is a host of a home or industrial local area
network using an Ethernet protocol.
This application note describes a method to provide TCP/IP over Ethernet connectivity to an
STR710-based solution and, as an example, an application layer has been included in the
solution firmware. The application is a server that waits for a Client request. The successful
or unsuccessful processing notification is sent back to the Client. The solution block diagram
is showed in Figure 1. The MAC layer is implemented using the third part CIRRUS LOGIC^®
Crystal LANTM CS8900A 10-baseT Ethernet controller because of its ISA bus interface.
The STR7 EMI interface can be interfaced with an ISA bus by simple Glue Logic.
Figure 1. Solution block diagram
STR7
EMI
ISA
Glue
Logic
RJ45
RS232
USB
February 2006
Rev 1
www.st.com
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