Specifications

Hardware Reference

110124-30002, preliminary

Indicators

The Helios platform has eight red/green/yellow light-emitting diodes (LEDs) that are

software-controlled. The following diagram illustrates the location of the LEDs. The

LEDs are visible to the operator on two sides of the enclosure.

The following table describes the LEDs on the enclosure.

LED CR Description Controller

(note 1)

Device

Red Signal

Green Signal

1 8 Serial activity USB UART IC CBUS4 CBUS3

2 1 Power SMBus GPIO P1 P0

3 2 Software-definable SMBus GPIO P3 P2

4 3 Software-definable SMBus GPIO P5 P4

5 4 Software-definable SMBus GPIO P7 P6

6 5 SATA activity SATA Controller LED0

SATA Controller LED1

7 6 Software-definable I2C GPIO P1 P0

8 7 SD card activity SMBus GPIO P2

SCH US15W SLOT0_LED

Note:

1. CR refers to the reference designator located on the base board.

LED2 indicates system power. By default, LED2 is illuminated green when power is

applied.

LEDs