1
1999 Integrated Device Technology, Inc.
DSC-4277/1
MAY 1999
10 / 100 Ethernet Adapter
in PCI Mezzanine Card (PMC)
Form-Factor
PRELIMINARY
IDT7M9401
FEATURES:
Bus Interface: 33Mhz, 5V, 32-bit PCI bus version 2.1
Electrical Compliance
Form-Factor: Single-wide PCI Mezzanine Card (74mm x 149mm).
Intel 82558 Fast Ethernet Single Chip LAN Controller
- Dual mode 10BASE-T/100BASE-TX PHY
- 100 Mbps transmission with minimum interframe spacing
- Glueless 32-bit PCI bus master interface
- Full or half duplex capable at 10 or 100 Mbps
Automatic 10 / 100 Mb configuration supports Ethernet, Fast
Ethernet, and mixed bandwidth networks via a single RJ-45
connector.
Compliant with IEEE 802.3u 100BASE-T specification.
DESCRIPTION:
The IDT7M9401 provides reliable, high performance 10/100 Ethernet
connectivity for PCI Mezzanine Card (PMC)-based systems. The IDT7M9401
is designed for mechanical and electrical compliance with the Common Mezza-
nine Card Specification (IEEE1386) and the PCI Mezzanine Card Specification
(IEEE1386.1). This low-profile I/O card is ideally suited to serve as an Ethernet
I/O card mounted on a standard VME or Compact PCI Single Board Computer.
OVERVIEW:
The central component of the IDT7M9401 is the Intel 82558 Fast Ethernet
single chip LAN controller. The 82558 connects directly to the PCI bus, an
expansion Flash memory device and an Ethernet LAN. The 82558's PCI bus
master interface provides efficient, low latency DMA transfer capability over PCI.
The 82558 chip provides both the Ethernet MAC and PHY layers in a single
device. This integration enhances reliability and reduces power consumption
requirements.
4277 drw 01
BLOCK DIAGRAM
SERIAL
E2PRO M
Inte l
82 558
PC I B U S, 32 -b it, 33 M hz,
5V
Rx
Tx
RJ-45
25
M hz
Osc
Flash
(O ptiona l)
M ag netics
Rx
Tx
LE D
LE D
LE D
LIN K
A C T IV IT Y
10 0 M B
2
1999 Integrated Device Technology, Inc.
DSC-4277/1
IDT
IDT7M9401
PIN ASSIGNMENTS
The 32-bit PCI bus is implemented in two 64-pin headers (PN1 & PN2)
in compliance with the PMC Specification and is provided below.
4277 tbl 01
4277 tbl 02
NOTES:
1. These signals are not connected (NC) on the IDT7M9401.
2. +3.3V is not used by the IDT7M9401; however, it is decoupled
on the board.
2
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3
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015
408-988-5647
Santa Clara, CA 95054
fax: 408-492-8674
ssdhelp@idt.com
www.idt.com
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
4277 drw 02
ORDERING INFORMATION
X
Power
X
Speed
X
Package
X
Process/
Tem perature
R ange
Blank
M
TM
Silver Face Plate
Black Face P late
S
Standard C onfiguration
XX XXX
D evice
Type
7M9401
10 / 100 Ethernet Adapter
ID T
100
Speed in M egabits/Second
C omm ercial (0C to +70C )
PDF 
ZIP