PC5-LARGO • CompactPCI
®
PlusIO • 5
th
Generation Intel
®
Core™-5xxx Processor
Front Panel LEDs
The PC5-LARGO is equipped with four LEDs which can be observed from the front panel. Three of
these LEDs are labelled according to their primary meaning, but should be interpreted altogether for
system diagnosis:
LED
Status
PG
Green/Red
GP
Green/Red
HD
Green/Yellow
OFF
GREEN
GREEN
Sleep State S5 (Soft Off)
OFF
GREEN
OFF
Sleep State S4 (Suspend to Disk/Hibernate)
OFF
OFF
GREEN
Sleep State S3 (Suspend to RAM/Standby)
GREEN
RED BLINK
X
After Reset
GREEN
X
X
Board Healthy and in S0 State
YELLOW BLINK
X
X
Front panel handle is unlocked
RED
X
X
Hardware Failure - Power Fault
RED BLINK
X
X
Software Failure
PG (Power Good) LED
The PC5-LARGO offers a bicolour LED labelled PG located within the front panel. After system reset,
this LED defaults to signal different power states:
<
Off
Sleep state S3, S4 or S5
<
Green
Healthy
<
Yellow blink Front panel handle open
<
Red steady
Hardware failure
<
Red blink
Software failure
To enter the PG LED state
Software Failure,
the bit PGLED in the board control register CTRLL_REG
must be set. The PG LED remains in this red blinking state until this bit is cleared. After that it falls
back to its default function.
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