D R A F T — F O R I N
T E R N A L U S E O N L Y
26
www.kontron.com
User Guide
CP3004-SA
2.7.1.1 System Status LEDs
Note:
If the TH LED flashes red at regular intervals, it indicates that the processor junction tem-
perature has reached a level beyond which permanent silicon damage may occur and the
processor has been shut off. To turn to normal operation, the power must be switched off
and then on again.
2.7.1.2 General Purpose LEDs
The General Purpose LEDs (LED3..0) are designed to indicate the boot-up POST code after which they
are available to the application. If the LED3..0 are lit red during boot-up, a failure is indicated. In this
event, please contact Kontron for further assistance.
For further information regarding the configuration of the General Purpose LEDs, refer to section
3.3.14 LED Configuration Register, and section 3.3.15 LED Control Register.
Note:
The bit allocation for Port 80 is the same as for the POST code.
Table 5: System Status LEDs Function
LED
COLOR
STATE
FUNCTION
TH LED
red / green
Off
Power failure
Green
Board in normal operation
Red
CPU has reached maximum allowable operating temperature and the per-
formance has been reduced
Red blinks
CPU temperature above 125°C (CPU has been shut off)
In this event, all General Purpose LEDs (LED3..0) are blinking red as well.
WD LED
red / green
OFF
Watchdog inactive
Green
Watchdog active, waiting to be triggered
Red
Watchdog expired
Table 6: General Purpose LEDs Function
LED
COLOR
FUNCTION
DURING BOOT-UP
FUNCTION DURING uEFI BIOS POST
(if POST code config. is enabled)
FUNCTION
AFTER BOOT-UP
LED3 red
Power
failure
--
General Purpose or Port 80
Default: General Purpose
green
--
uEFI BIOS POST bit 3 and bit 7
red+green
--
--
LED2
red
CPU catastrophic error
CPU catastrophic error
General Purpose or Port 80
Default: General Purpose
green
--
uEFI BIOS POST bit 2 and bit 6
red+green
--
--
LED1
red
Hardware reset
--
General Purpose or Port 80
Default: General Purpose
green
--
uEFI BIOS POST bit 1 and bit 5
red+green
--
--
LED0
red
uEFI BIOS boot failure
--
General Purpose or Port 80
Default: General Purpose
green
--
uEFI BIOS POST bit 0 and bit 4
red+green
--
--
