Kontron AM4320 - Manual (Page 21)

9 AM4320
www.kontron.com
2.4.2.2 Module Hot Swap
The hot-swap event message conveys the current state of the module, the previous state, and a cause of the
state change as determined by the MMC. Refer to AMC.0 R2.0 Specifications for further details on module
hot-swap states.
2.4.3 Field Replaceable Unit (FRU) Information
The FRU Information provides inventory data about the boards where the FRU Information Device is located.
The part number or version number can be read through software.
FRU information in the AM4320 includes data describing the AM4320 board as per the AMC.0 R2.0
specification. This information is retrieved by the Carrier, enabling reporting of board-specific information
through a standardized mechanism.
Following are the definitions for the multirecord implemented by the firmware as part of Module data.
2.4.4 E-Keying
E-Keying has been defined in the AMC.0 R2.0 Specification to prevent module damage, prevent
misoperation, and verify bay connection compatibility. The FRU data contains the AMC point-to-point
connectivity record as described in Section 3.9.2 of the AMC.0 R2.0 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.
2.4.5 MMC Firmware Code
MMC firmware code is organized into boot code and operational code, both of which are stored in a flash
module. Upon an MMC reset, the MMC executes the boot code and performs the following:
1 Self-test to verify the status of its hardware and memory.
2 Performs a checksum of the operational code.
3 Communicates with the Boot Block in order to inform the MMC watchdog that the actual MMC firmware is
suitable for execution.
Upon successful verification of the operational code checksum, the firmware will jump to the operational
code.
2.4.6 Firmware Upgrade Procedure
The board’s designed to support upgrade via HPM commands. Always follow Kontron documentation for all
your upgrade. The instructions are provided with any new software upgrade package.
Upgrades have been designed to be performed without payload impact.