Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 4/01/2024
Public

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13.4.4.2. Urgency and Pressure Signals

The system interconnect uses encoded values to indicate urgency. These encoded values are only propagated internally within system interconnect. The following table shows the urgency and pressure signal encoding.

Table 381.  Urgency and Pressure Signal Encoding
2-bit Encoded Value Urgency/Pressure Traffic Class
2’b11 Highest Latency critical
2’b01 High Latency sensitive
2’b00 Lowest Best effort

These encoded values are sent as “Urgency” within a packet.

These encoded values are sent as “Pressure” as a side-channel independent of any packets.