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CS8920 Datasheet(PDF) 6 Page - Cirrus Logic

Part # CS8920
Description  Ethernet Controller
PDF  66 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS8920 Datasheet(HTML) 6 Page - Cirrus Logic

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AN84REV1
6
CS8920 Technical Reference Manual
1.0 Introduction to CS8920
Technical Reference Manual
This Manual provides the information
which will be helpful in designing a board
using the CS8920, programming the
associated EEPROM, and installing and
running the CS8920 device drivers. It is
expected that the user of this Technical
Reference Manual will have a general
knowledge of hardware design, Ethernet,
the ISA bus, and networking software.
Recommended sources of background
information are:
a) ISA System Architecture by Shanley
and Anderson, Mindshare Press, 1992,
ISBN 1-881609-05-7
b) Ethernet, Building a Communication
Infrastructure, by Hegering and Lapple,
Addison-Wesley, 1993, ISBN 0-201-
62405-2
c) Netware Training Guide: Networking
Technologies, by Debra Niedenmiller-
Chaffis, New Riders Publishing, ISBN
1-56205-363-9
As shown in the Figure 1.1, the CS8920
requires a minimum number of external
components. The EEPROM stores
configuration information such as interrupt
number, DMA channel, I-O base address,
memory base address, and IEEE Individual
Address. The EEPROM can be eliminated
on a PC motherboard if that information in
stored in the system CMOS. Note also that
the Boot PROM is only needed for diskless
workstations that boot DOS at system
power up, over the network. Also, the LEDs
are optional.
Figure 1.1 - Hardware Application Summary
Boundary
RAM
ISA
Bus
Logic
Memory
Manager
Media Access
Control
(MAC).
Ethernet
protocol
processing.
EEPROM
Control
Encoder,
Decoder
&
PLL
10BASE-T
RX Filters &
Receiver
10BASE-T
TX Filters &
Transmitter
AUI
Transmitter
AUI
Collision
AUI
Receiver
Clock
Power
Manage
Scan
Test Logic
LED
Control
EEPROM:
Stores Configuration
Information &
IEEE Address
57
pins
ISA Bus
Boot PROM:
Used to boot diskless
workstations.
AUI
Transformer
(Attachment
Unit
Interface)
10BASE-T
Transformer



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