ADLINK Technology cPCI-6630 Series, User Manual

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24 Board Interfaces
Leading
EDGE COMPUTING
4.5 User LEDs
During bootup, the eight User LEDs on the faceplate display port
80h POST codes in hexadecimal during boot up. Users can use
the POST codes to identify issues during the BIOS POST process.
In default mode, these eight LEDs display the POST code output
to Port 80h during system bootup. The LED number corresponds
to the bit number (from "0" to "7"). For example, if the bit7 > bit0
output is "01110101", then the port 80h output is "75h" (see
Chapter 9 Checkpoints & Beep Codes on page 115).
Each LED indicates a corresponding bit of the port 80h POST
code. Refer to the figure and table below.
Figure 4-4: cPCI-6630(D) LED Labels
After the system is under OS control, the eight User LEDs can be
controlled as user defined LEDs. The LEDs are connected to eight
GPIO pins of the Super I/O IT8786. See Section 7.2 for informa-
tion on programming the User LEDs.
For assistance using the User LEDs, please log in to:
http://askanexpert.adlinktech.com .
LED No. Port 80h bit
Low Nibble
LED 0 Port 80h bit0
LED 1 Port 80h bit1
LED 2 Port 80h bit2
LED 3 Port 80h bit3
High Nibble
LED 4 Port 80h bit4
LED 5 Port 80h bit5
LED 6 Port 80h bit6
LED 7 Port 80h bit7
7 6 5 4 3 2 1