Functional Description CP3002
Page 2 - 8 ID 1042-9252, Rev. 2.0
P R E L I M I N A R Y
2.11 Board Interfaces
2.11.1 Front Panel LEDs
T
he 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
T
he 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 FUNCTION AFTER BOOT-UP
WD LED green Watchdog status:
off = Watchdog inactive (default)
on = Watchdog active, waiting to be triggered
TH LED red Processor overtemperature:
on = processor temperature is above the safe operating area
blinking = processor has reached a junction temperature of approximately
125°C (Thermtrip)
green The processor is in a safe operating area.
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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