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Functional Description
CPB902
C P B 9 0 2 U s e r M a n u a l
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© 2 0 0 8 F a s t w e l v . 1 . 5 b E
4.3.19 Diagnostic
LEDs
CPB902 has four diagnostic LEDs (D9, D10, D11, D20 - upper-right corner in
). If the
processor module is installed into the mounting cage, additional light pipes can be installed to
conduct the light to the front panel. The following table describes the function of these LEDs.
Table 4.25:
CPB902 Diagnostic LEDs Function
LED
Function
D9
IDE HDD activity
D10
User LED1
D11
User LED2
D20
Processor reset by WDT.
This LED lights up when the processor was reset on WDT timeout expiry.
It should not lit during normal operation.
LED1 and LED2 user LEDs are linked directly with GPIO5 and GPIO6 microprocessor ports. They
are switched on and off by a BIOS procedure, which can be invoked from user application
programs. The description of the procedure can be found in
.
4.3.20
Power
Supply
Connector
The power is supplied to CPB902 via J20 connector. The main power voltage of the processor
module is +5V. +12 V is supplied via J20 connector, but is not used in CPB902. It is routed to P4
PC/104 connector. The PC/104 connector contacts corresponding to -5 V and -12 V voltages are
not connected to the board circuitry. The following table gives J20 contacts' assignments.
Table 4.26:
J20 Power Connector Pinout
Pin
Assignment
1
+12 V
2
GND
3
GND
4
+5 V