Specifications

MDR User Guide 105
Ethernet Host Interface
The MDR module utilizes the Ethernet PMC to provide networking access to hosts like
a PC or workstation.
DE520 Ethernet PMC
The DE520 is an Ethernet Adapter as a PCI Mezzanine Card (PMC) with a direct
interface to the 32-bit PCI local bus. This dual-speed module uses a single connector for
either a 10 megabits per second (10 Mb/s) or a 100 megabits per second (100 Mb/s)
IEEE 802.3 Ethernet network connection. The module automatically senses and
switches to the correct speed.
Current Model
DE520 Ethernet PMC Module, 10 or 100 Mb/s from Compaq.
Features
The DE520 Ethernet PMC Module has the following features:
• High performance: full-speed, 32-bit DMA bus transfers at 132 MiB/s.
• Single-shielded or unshielded RJ-45 connection.
• Automatic sensing of speed and change to that speed.
• Powerful parallel cut-through architecture and other patented features to maximize
data throughput and minimize CPU use.
• 100BASE-TX (100 Mb/s) with UTP Category 5 cabling or 10BASE-T
(10 Mb/s) with UTP Category 3, 4, 5 cabling.
• Configurable by software to operate in full-duplex mode, increasing the aggregate
bandwidth up to 20 Mb/s and 200 Mb/s.
• Compliance with PCI revision 2.0.
• Compliance with FCC Class A and CISPR-22 Class A.
Connector Pinout (RJ-45)
Pin Number Signal Name
1 Transmit +
2 Transmit –
3 Receive +
4 NC (no connection)
5 NC (no connection)
6 Receive –
7 NC (no connection)
8 NC (no connection)
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