Specifications

3
LEDs and External Interfaces
26
Front panel LEDs
Table 2describesthefrontpanelstatusandactivityLEDs.
TheIPMCusesGPIOpinstocontrolthehotswapandpowerLEDs.TheIPMCsupplies
defaultstatesfortheLEDsandrespondstosensorreadings,GPIOinputs,andIPMI
commandsfromotherentitiestochangeLEDstates.
Front panel connectors
USB 2.0 connectors
TheUSBinterfaceonthefrontpanelisadual‐portstacke dconnector.USBperipheral
devices,suchasCD‐ROMdrivesorUSBstorage,canbeconnectedtotheseportsusinga
standardUSB2.0cable.
Table 2. Front panel LEDs
Label LED ID Definition Color LED states
OOS LED 1 Out of service Amber or
red
a
a
The user application can select the LED color using the Set FRU LED State IPMI command. Only red or amber can
be selected for the OOS LED.
Controlled by the IPMC or the user.
b
Default behavior:
• Default LED color is set by the IPMC
• Always OFF, except for the following situation:
• Persistent blink when both active and backup IPMC
application images are invalid or corrupted.
b
The user application can control LED color and illumination using the Set FRU LED State IPMI command. LED
illumination can be turned on or off, the LED can be configured to blink, or the lamp test function can be enabled.
To use the command, specify the FRU ID, LED ID (which is “1” for the OOS LED), LED function, LED on duration,
and illumination color. Command usage is described in the PICMG specification, FRU LED Control commands,
section 3.2.5.6.
PWR LED 2 Power Green Indicates whether CPM power supplies are within
tolerance. The possible states are:
• Green: All power supplies initially good, and power has
not been removed.
• Off: Module not powered on.
APP LED 3 Application
defined
Amber
b
Controlled by the IPMC, with functionality defined by the
system implementer.
b
By default, this LED is off.
H/S H/S Hot swap
status
Blue Controlled by the IPMC with these possible states:
• Long blink: Activating the module after insertion.
• Short blink: Preparing for hot swap.
• Solid: Ready for hot swap.
• Off: No hot swap activity in progress.