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
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
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).
