Multi-Color LED

The CMX158886 has a Multi-Color LED located beside the EIDE connector (CN10) 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 54.

 

Table 54 LED Colors

 

 

Color

Description

 

 

Green

Normal Operation

Blue

On Board IDE Activity

Red

cpuModule is in reset1

Yellow (Red + Green)

cpuModule is in Standby

White (R+G+B)

cpuModule is approaching thermal limit2

Cyan (Blue + Green)

Ethernet Link at 10 Mbps

Magenta (Blue + Red)

Ethernet Link at 100 Mbps

Blink

Ethernet Activity

 

 

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

2.The LED will remain White until the system is shut down.

The LED can also be controlled manually by writing to I/O Port 456h, as shown in Table 55 and Table 56.

Table 55 Multi-Color LED I/O Address 456h

 

D7

D6

D5

D4

D3

D2

D1

D0

 

 

Reserved

Reserved

Reserved

Reserved

Reserved

 

Multi-Color LED

 

 

 

(User

(User

(User

 

 

 

 

 

 

 

EEPROM)

EEPROM)

EEPROM)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note When writing to I/O Port 456h, only the lower three bits of the register should be modified.

Modifying the upper bits will effect the User EEPROM

The following table lists the color displayed and the value written.

 

Table 56 Manual LED Colors

 

 

I/O Port 456h Value

Color

 

 

0x00

Automatic (see Table 54)

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)

 

 

76 CMX158886 cpuModule

BDM-610000049 Rev G

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Image 86
IBM BDM-610000049 user manual Multi-Color LED I/O Address 456h, Manual LED Colors

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