rtd cpuModules CMA34CR, User Manual

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68 CMA34CR cpuModule BDM-610000083 Rev L
Multi-Color LED
The CMA34CR has a Multi-Color LED which can be enabled or disabled in the BIOS setup screen. The color of
the LED indicates the status of the board, as shown in Table 48.
The LED can also be controlled manually by writing to I/O Port EA5h, as shown in Table 49 and Table 50.
The following table lists the color displayed and the value written.
Table 48 LED Colors
Color Description
Green Normal Operation
Blue SATA Activity
Red
1
1. If power is applied to the cpuModule while jumper JP5 is installed, the LED will be red. This does not
indicate that the board is in reset
cpuModule is in reset
2
2. Unlike previous generations of RTD cpuModules, the CMA34CR requires both +5V and +12V to be
present to come out of reset. For more information, refer to: Auxiliary Power (CN3) — page 30
Yellow (Red + Green) cpuModule is in Standby
White (R+G+B) cpuModule is approaching thermal limit
3
3. The LED will remain White until the system is shut down.
Cyan (Blue + Green) Ethernet Link at 100 Mbps or Bus Stacking Error
Magenta (Blue + Red) Ethernet Link at 1000 Mbps
Blink Ethernet Activity
Table 49 Multi-Color LED I/O Address EA5h
D7 D6 D5 D4 D3 D2 D1 D0
Reserved Reserved Reserved Reserved Reserved Multi-Color LED
Table 50 Manual LED Colors
I/O Port Value Color
0x00 Automatic (see Table 48)
0x08 Off (will reduce system power consumption)
0x09 Blue
0x0A Green
0x0B Cyan (Green + Blue)
0x0C Red
0x0D Magenta (Red + Blue)
0x0E Yellow (Red + Green)
0x0F White (Red + Green + Blue)