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adn_endec_decoder_64b66b (module)

Author: Foez Ahmed (foez.official@gmail.com)

Source: adn_endec_decoder_64b66b.sv

Top IO

Parameters

None

Ports

Name Direction Type Dimension Description
block_in input logic [65:0]
scramble_state_in input logic [57:0]
payload_out output logic [63:0]
sync_header_out output logic [ 1:0]
scramble_state_out output logic [57:0]
header_err output logic

Description

This module implements a 64b/66b decoder designed to process encoded data blocks. It performs synchronization header extraction, payload descrambling using a provided state, and validation of the sync header to detect transmission errors.

Usage

The adn_endec_decoder_64b66b module is used to decode 66-bit blocks into 64-bit data payloads.

  1. Input: Provide the 66-bit encoded block to block_in and the current 58-bit scrambling state to scramble_state_in.
  2. Processing: The module extracts the 2-bit sync header and descrambles the 64-bit payload using the provided state.
  3. Output: The decoded 64-bit payload is available at payload_out, the sync header at sync_header_out, and the updated scrambling state at scramble_state_out.
  4. Error Detection: The header_err signal asserts high if the sync header is invalid (i.e., not 2'b01 or 2'b10).
REVISION DATE AUTHOR DESCRIPTION
1.0 2026-07-29 Foez Ahmed Stable release

Author : Foez Ahmed (foez.official@gmail.com)