Networking Interface for Open Programmable Acceleration Engine: Intel FPGA Programmable Acceleration Card D5005

ID 683830
Date 11/04/2019

2.2. Physical View

This section depicts the hardware view of a single transceiver channel and its sub-components as part of the Native PHY IP core. The Native PHY IP core is optimized for the lowest roundtrip latency. The Native PHY IP TX/RX PCS-Core Interface FIFOs are configured as following:
  • Both QSFP28 Port-0 and Port-1 TX FIFOs are in Phase Compensation mode such that TX clocks can be shared across all 4 channels per QSFP28 interface.
  • QSFP28 Port-0 RX FIFO is in Phase Compensation mode.
  • QSFP28 Port-1 RX FIFO is in Register mode (bypassed).
Note: In the following figures, the PCS, MAC, and User Logic blocks under AF are shown for illustration. These blocks are not provided by Intel as part of the AFU. Intel only provides an example AFU with 8xPRBS Generators and Verifiers.
Figure 3. Physical View with QSFP28 Port-0
Figure 4. Physical View with QSFP28 Port-1

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