rtd cpuModules CME34BT, User Manual, Page: 76 / 110

68 CME34BT cpuModule BDM-610000088 Rev A
Multi-Color LED
The CME34BT 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 42.
The LED can also be controlled manually by writing to I/O Port EA7h, as shown in Table 43 and Table 44.
The following table lists the color displayed and the value written.
Table 42 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
Yellow (Red + Green) cpuModule is in Standby
White (R+G+B) cpuModule is approaching thermal limit
2
2. 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 43 Multi-Color LED I/O Address EA5h
D7 D6 D5 D4 D3 D2 D1 D0
Reserved Reserved Reserved Reserved Reserved Multi-Color LED
Table 44 Manual LED Colors
I/O Port EA7h Value Color
0x00 Automatic (see Table 42)
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)