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Keysight M9502A/M9505A AXIe Chassis User Guide
Features and Functions
LVDS Local Bus
E-Keying Process
When the chassis powers on, the first step the shelf manager does in
point-to-point (P2P) E-Keying is read the backplane P2P connectivity records
from the chassis modules. These connectivity records specify the P2P
interconnections the backplane routes between specific slots and specific
channels on each slot.
Next, for each board loaded in the chassis, the shelf manager reads each board's
Field Replaceable Unit (FRU) table for the P2P connections that board makes to
the backplane. The shelf manager builds up a connection inventory of all the
potential links a particular board can implement. This list is later used to examine
the potential logical links each board has to other boards. Each potential link end
has a link descriptor that identifies the following information:
-
P2P interface on the backplane and a channel number within that interface
-
The ports on a given channel that are involved with this link. This may include
sets of differential signal pairs.
-
Finally, the link type which identifies the specification entity, such as PICMG
3.x, AXIe 1.0, or other specification that fully describes the link classification.
The link type may also be an OEM-defined value using a 128-bit Globally
Universal Identifier (GUID); each card may support up to 15 different GUIDs.
The shelf manager goes through the backplane connection possibilities,
identifying each end of a P2P connection and searches for a compatible link
descriptors. If a pair of ends match, such as both ends are PCIe Express x4, then
the shelf manager issues a “Set Port State (enable)” command to each board for
that link. For the matches that are not found, the shelf manager issues a “Set
Port State (disable)” command to ensure that incompatible link connections are
kept off.
As a final note, the shelf manager is truly agnostic about specific details of a link
protocol. This permits new protocols to be added without modification to the
chassis.
For additional information on E-Keying, refer to the AdvancedTCA specification
(
http://www.picmg.org
) and the AXIe specification
).
Summary of Contents for M9502A
Page 1: ...Keysight M9502A 2 Slot and M9505A 5 Slot AXIe Chassis User Guide...
Page 2: ......
Page 30: ...20 Keysight M9502A M9505A AXIe Chassis User Guide Introduction Product Warranty...
Page 74: ...64 Keysight M9502A M9505A AXIe Chassis User Guide Using the Soft Front Panel SFP Screens...
Page 138: ...128 Keysight M9502A M9505A AXIe Chassis User Guide Glossary...
Page 141: ......
