Ethernet Interface - Motorola MVME2300 Series Installation And Use Manual

Functional Description
Table 3-7.PowerPC 60x Bus to Flash Access Timing for Bank B (16-bit Port)
Access type
3
1-Beat Read (1 byte)
1-Beat Write

Ethernet Interface

3-12
Clock Periods Required for:
1st Beat
20
19
The MVME2300 module uses a DECchip 21140/21143 PCI Fast Ethernet
LAN controller to implement an Ethernet interface that supports
10BaseT/100BaseTX connections, via an RJ45 connector on the front
panel. The balanced differential transceiver lines are coupled via on-board
transformers.
Every MVME2300 is assigned an Ethernet station address. The address is
$08003E2xxxxx, where xxxxx is the unique 5-nibble number assigned to
the board (every board has a different value for xxxxx).
Each MVME2300 displays its Ethernet station address on a label attached
to the base board in the PMC connector keepout area just behind the front
panel. In addition, the six bytes including the Ethernet station address are
stored in the NVRAM (BBRAM) configuration area specified by boot
ROM. That is, the value 08003E2xxxxx is stored in NVRAM. The
MVME2300 debugger, PPCBug, has the capability to retrieve the Ethernet
station address via the CNFG command.
The unique Ethernet address is set at the factory and should not
Note
be changed. Any attempt to change this address may create node
or bus contention and thereby render the board inoperable.
If the data in NVRAM is lost, use the number on the label in the PMC
connector keepout area to restore it.
For the pin assignments of the 10BaseT/100BaseTX connector, refer to
Appendix A, Specifications.
2nd 3rd 4th
Beat Beat Beat
- - -
- - -
Computer Group Literature Center Web Site
Total
Clocks
20
19