Board Layout - HP Vectra XW Technical Reference Manual

3 Interface Boards and Mass-Storage Drives
HP PCI Integrated 10/100 BT Interface Board

Board Layout

The analog MLT3 encoder chip is responsible for shaping the output signal
to comply with the specification. The physical transceiver chip (PHY)
converts analog signals to digital, sending its signals to the 82557, and
controlling three status lights. The flash, boot ROM, socket is left empty. The
82557, in the 160-pin PQFP package, is the PCI interface, CSMA/CD chip,
and contains a 6 KB packet buffer for the temporary storage of data received
or awaiting transmission over the network.
• Link
• Activity
• 100 Mb/s
MLT3
encoder
100 MHz
RJ-45
There are three status lights for monitoring the adapter status: an Activity
light, showing network activity, and two whose meaning is summarized by
the following table.
Link Status 100-Mbits/s
Light
ON OFF
ON ON
OFF ON
26
25
MHz
PHY
10/100
Datapath
50
MHz
10 MHz
Light
Normal 10 Mbits per second operation
Normal 100 Mbits per second operation
Either:
Cable is not connected to an active network.
Cable is defective.
LAN Adapter is defective.
Data
Flash
Latch
EEPROM
82557
PCI Network
Controller
33 MHz PCI Bus
Explanation