2.4
Front Panel Indicators and Controls
When installing or removing the board for the first time, or when checking it’s operation, it can be
very useful to note the behavior of the LEDs on the front panel. Figure 2-2 shows the location of
the LEDs, and their purpose is outlined below.
2.4.1
Run LED (R) Green
The run LED indicates that activity is occurring on the PCI bus. This allows the user to quickly
assess how active the PCI bus is.
2.4.2
POST LED (P) Yellow
The POST LED is used to indicate that a power on self test has failed. This LED will also flash
when outputting sound on the speaker.
2.4.3
Ethernet Speed LED (Speed) Yellow
This LED indicates the operating speed of the front panel Ethernet interface, as follows:
l
Off = 10Mbits/s
l
Steady On = 100Mbits/s
NOTE
The LED stays Off if the Ethernet interface is routed to the rear panel.
2.4.4
Link/Activity LED (LK/ACT) Green
This LED lights when connection has been made on the Ethernet interface. It will flash to
indicate link activity, and during periods of high Ethernet activity the LED may switch off for
several seconds.
NOTE
The LED stays Off if the Ethernet interface is routed to the rear panel.
2.4.5
User LED (U) Red
This LED is available for use by user software. It is manipulated using RMI registers (see
Section 10.7 for details).
2.4.6
Hot-Swap LED (H) Blue
This LED is used when the board is hot-swapped, and lights to indicate when the board can be
safely removed from the chassis.
2.4.7
EIDE Activity LED (I) Green
This LED lights when there is activity on the on-board (secondary) EIDE interface.
NOTE
The AD PP5/001 Transition Module contains a LED to indicate activity on the
off-board (primary) EIDE interface.
2-4
PP 110/01x
Hardware Installation
Console I/O
(Shared Connection)
PMC 2
PMC 1
Ethernet CH0
User
LED
Speed
LK/ACT
IDE
Activity
Hot-Swap LED
POST
LED
Reset
Switch
Run
LED
Figure 2-2 Front Panel Indicators and Controls
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