Cyclone V Device Handbook: Volume 2: Transceivers

ID 683586
Date 10/24/2018
Document Table of Contents Transmitter Protocol Specific

There are two PCIe features in the transmitter PMA section—receiver detect and electrical idle.

  • PCIe Receiver Detect—The transmitter buffers have a built-in receiver detection circuit for use in PCIe configurations for Gen1 and Gen2 data rates. This circuit detects whether there is a receiver downstream by sending out a pulse on the common mode of the transmitter and monitoring the reflection.
  • PCIe Electrical Idle—The transmitter output buffers support transmission of PCIe electrical idle (or individual transmitter tri-state).