Board Interfaces; Front Panel Leds; Watchdog And Temperature Status Leds; Watchdog And Thermal Status Leds - Kontron CP3002 User Manual

Functional Description
2.11

Board Interfaces

2.11.1

Front Panel LEDs

The CP3002 is equipped with one Watchdog Status LED (WD LED), one Temperature Status LED
(TH LED), and four General Purpose/POST code LEDs (LED0..3). Their functionality is described
in the following chapters and reflected in the registers mentioned in Chapter 4, Configuration.
2.11.1.1

Watchdog and Temperature Status LEDs

The CP3002 provides one Watchdog Status LED (WD LED) and one Temperature Status LED
(TH LED).
Table 2-3:

Watchdog and Thermal Status LEDs

LED COLOR
WD LED green
TH LED red
green
Note ...
If the TH LED flashes red on and off at regular intervals, it indicates that the pro-
cessor junction temperature has reached a level beyond which permanent sili-
con damage may occur. Once activated, the Thermtrip event remains latched
until a cold restart of the CP3002 is undertaken (all power off and then on
again).
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FUNCTION AFTER BOOT-UP
Watchdog status:
off = Watchdog inactive (default)
on = Watchdog active, waiting to be triggered
Processor overtemperature:
on = processor temperature is above the safe operating area
blinking = processor has reached a junction temperature of approximately
125°C (Thermtrip)
The processor is in a safe operating area.
CP3002
ID 1042-9252, Rev. 2.0