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to move to the M6 state. The Hot Swap LED will indicate this state with a short blink. Once
permission is received from the SHMC or higher-level software, the SBC will move to the M6 state.
The SHMC or higher level software can reject the request to move to the M6 state. If this occurs, the
Hot Swap LED returns to a solid off condition, indicating that the SBC has returned to M4 state.
If the SBC reaches the M6 state, either through an extraction request through the lower ejector
handle or a direct command from higher-level software and an ACPI-enabled OS is loaded on the
SBC, the IPMC communicates to the OS that the module must discontinue operation in preparation
for removal. The Hot Swap LED continues to flash during this preparation time, just like it does at
the M5 state. When main board power is successfully removed from the SBC, the Hot Swap LED
remains lit, indicating it is safe to remove the SBC from the chassis.
LED Status
Off
Blinking Blue
Solid Blue
2.16.9.7
In addition to captive retaining screws, the AT8001 SBC has two ejector mechanisms to provide
a positive cam action; this ensures the blade is properly seated. The bottom ejector handle
also has a switch that is connected to the IPMC to determine if the board has been properly
inserted.
Normal status
Preparing for removal/insertion: Long blink indicates activation is in progress,
short blink when deactivation is in progress.
Ready for hot swap
Ejector Mechanism
Meaning
2-35
AT8001 User's Guide
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