Hardware Management Overview

3.14.4IDE Drive Activity LED

Table 28. IDE Drive Activity LED

LED Status

Meaning

 

 

Off

Normal/No disk access

 

 

Green (Blinking)

Disk access (read/write activity)

 

 

3.14.5User Programmable LEDs

The MPCBL0001 SBC provides two bicolor LEDs for user-programmable functions. The LEDs can be driven to display a red, green or amber color. When these LEDs are lit, they indicate a status of a user-defined function.

Table 29.

User Programmable LEDs

 

 

 

 

 

 

 

 

 

LED Status (left)

LED Status (right)

 

Meaning

 

 

 

 

 

 

 

Off

Off

No Status

 

 

 

 

 

 

 

Red

Red/Green

Active Status of user defined function

 

 

 

 

 

 

 

The user-programmable LEDs are connected to the GPIO pins on the ICH3 device as follows:

Table 30.

GPIO Pin Connections

 

 

 

 

 

 

 

 

 

 

 

LED

 

Pin

 

 

 

 

 

 

 

 

 

User_Prog_LED1_Red#

 

GPIO21

 

 

 

 

 

 

 

 

 

User_Prog_LED1_GRN#

 

GPIO20

 

 

 

 

 

 

 

 

 

User_Prog_LED2_Red#

 

GPIO28

 

 

 

 

 

 

 

 

 

User_Prog_LED2_GRN#

 

GPIO23

 

 

 

 

 

 

 

 

By programming the ICH3 GPIO registers as outputs, then selecting the appropriate state (low for illumination, high for off), the user enables the LEDs as required. Refer to the ICH3 datasheet in appendix B for specific GPIO 20, 21, 23, 28 register information.

Intel NetStructure® MPCBL0001 High Performance Single Board Computer

65

Technical Product Specification

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Intel MPCBL0001 manual IDE Drive Activity LED, User Programmable LEDs, Gpio Pin Connections