Led State - Kontron AT8402 User Manual

AT8402
4.4.3 E-Keying
E-Keying has been defined in the PICMG 3.0 Specification to prevent board damage, prevent
misoperation, and verify fabric compatibility. The FRU data contains the board point-to-point
connectivity record as described in Section 3.7.2.3 of the PICMG 3.0 specification.
When the board enters M3 power state, the shelf manager reads in the board point-to-point
connectivity record from FRU and determines whether the board can enable the Gigabit Eth-
ernet ports to the back plane. Set/Get Port State IPMI commands defined by the PICMG 3.0
specification are used for either granting or rejecting the E-keys.
Additional E-Keying is prodived for connectivity between the AMC carrier and the AMC bays
as described the in Section 3.9 and 3.7 of the AMC.0 RC.1.1 specification. The Set/Get AMC
Port State IPMI commands defined by the AMC.0 specification are used for either granting or
rejecting the E-keys.
4.4.4 IPMC Firmware Code
IPMC firmware code is organized into boot code and operational code, both of which are stored
in a flash module. Upon an IPMC reset, the IPMC executes the boot code and performs the
following:
1. Self test to verify the status of its hardware and memory.
2. Calculates a checksum of the operational code.
3. Communicates with the Firmware Upgrade Manager (FUM) in order to inform the IPMC
watchdog that the current IPMC firmware is suitable for execution.
Upon successful verification of the operational code checksum, the firmware will jump to the
operational code.
4.4.5 LEDs
For LED positions on the front panel, refer to Chapter 3, section 3.1.11., Front Panel Elements.
4.4.5.1 Hot Swap LED (Blue LED)
The AT8402 Carrier Board supports a blue Hot Swap LED mounted on the front panel. This
LED indicates when it is safe to remove the Carrier from the chassis. The on-board IPMC drives
this LED to indicate the hot swap state. The following states are possible:
Table 4-4:

LED state

LED state
OFF
ON
Short blink
Long blink
Board is in M4 state, normal state when board is in operation.
Ready for hot swap
Board is in M5 state. Deactivation in progress
Activation in progress.
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Software Description
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AT8402 User Guide