User Guide • PC3-ALLEGRO • CompactPCI
®
PlusIO CPU Board • Intel® i7-3xxx Processor
HD (Hard Disk Activity) LED
The PC3-ALLEGRO offers a bicoloured LED marked as HD placed within the front panel. This LED,
when blinking green, signals activity on any device attached to the SATA ports of the Intel® QM77
Panther Point Platform Controller Hub (PCH). Blinking yellow signals activity on any device attached to
the SATA ports of the Marvell 88SE9230 SATA RAID Controller.
As previously described, the green part of this LED may change its function dependent on the state of
the LED PG.
EB (Ethernet Backplane) LED
To monitor the link status and activity on both Ethernet ports attached to the backplane via the
CompactPCI
®
Serial connector P6 a single bicoloured LED is provided in the front panel. The states are
decoded as follows:
1_ETH
2_ETH
LED EB
no link
no link
OFF
link
no link
GREEN
no link
link
YELLOW
link
link
GREEN/YELLOW
Blinking of the LED EB in the appropriate colour means that there is activity on the port.
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