MAC Transfer Layer

Versal Adaptive SoC Technical Reference Manual (AM011)

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1.6 English

The transfer layer provides these main functions:

  • Initiation of the transmission process after recognizing bus idle (compliance with interframe space)
    • Serialization of the frame
    • Bit stuffing
    • Arbitration and passing into receive mode in case of loss of arbitration
    • ACK check
    • Presentation of a serial bitstream to PHY for transmission
    • CRC sequence calculation including stuff bit count for FD frames
    • Bit rate switching
  • Reception of a serial bitstream from the PHY
    • Deserialization and recompiling of the frame structure
    • Bit de-stuffing
    • Transmission of ACK
    • Bit rate switching
  • Bit timing functions
  • Error detection and signaling
  • Recognition of an overload condition and reaction