Pci Local Buses And Devices; Gigabit Ethernet Interface; 10/100Mb Ethernet Interface - Motorola MVME5500 Installation And Use Manual

Functional Description

PCI Local Buses and Devices

4

Gigabit Ethernet Interface

10/100Mb Ethernet Interface

4-8
The GT-64260B on the MVME5500 provides two independent 64-bit,
33/66 MHz PCI buses. The GT-64260B documentation refers to these
buses as PCI Bus 0 and PCI Bus 1.
The devices on Bus 1 are the GT-64260B PCI bridge 1, one 32/64-bit PMC
slot, and an 825544EI LAN device. The devices on Bus 0 are the
GT-64260B PCI bridge 0, one 32/64-bit PMC slot, and a HiNT PCI 6154
PCI-to-PCI bridge. For the purpose of this document, Bus 1 is also
identified as PCI Bus 1.0, and Bus 0 is also identified as PCI Bus 0.0.
The MVME5500 provides a Gigabit Ethernet transceiver interface
(1000BaseT) using an Intel 82544EI integrated Ethernet device
(Ethernet 1). It also supports 100BaseTX and 10BaseT modes of
operation. The Ethernet interface is accessed via an industry-standard,
front-panel mounted RJ-45 connector.
The 10/100Mb Ethernet interface (Ethernet 2) comes from the GT-
64260B, and connects to an external PHY. This port can be routed to a
front-panel RJ-45 connector or to the P2 connector with user-configurable
jumpers.
Each Ethernet interface is assigned an Ethernet Station Address. The
address is unique for each device. The Ethernet Station Address is
displayed on a label affixed to the board. The assembly policy is to assign
MAC addresses in such a manner that the higher value MAC address is
assigned to Ethernet port 1 and the lower to Ethernet port 2.
In addition, the Gigabit Ethernet address is stored in a configuration ROM
interfaced to the 82544EI device, while the 10/100Mb Ethernet address is
stored in the on-board VPD serial EEPROM.
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