Arria® V Device Handbook: Volume 2: Transceivers

ID 683573
Date 5/29/2020
Public
Document Table of Contents

1.2.2.5.4. Manual Ordering Mode

In manual ordering mode, the byte ordering operation is controlled using the rx_enabyteord signal.

A rising edge on the rx_enabyteord signal triggers byte ordering to look for the byte ordering pattern in the byte-deserialized data.

When the first data byte that matches the byte ordering pattern is found, the byte ordering performs the following operations:

  • If the pattern is not in the LSByte position—byte ordering inserts the appropriate number of pad patterns to push the byte ordering pattern to the LSByte position and indicates the byte alignment.
  • If the pattern is in the LSByte position—byte ordering indicates the byte alignment.

Any byte misalignment found thereafter is ignored unless another rising edge on the rx_enabyteord signal is observed.