Cyclone V Device Handbook: Volume 2: Transceivers

ID 683586
Date 10/24/2018
Document Table of Contents

1.2.1. Transmitter PMA Datapath

Table 2.  Functional Blocks in the Transmitter PMA Datapath
Block Functionality
  • Converts the incoming low-speed parallel data from the transmitter PCS to high-speed serial data and sends the data LSB first to the transmitter buffer.
  • Supports 8-, 10-, 16-, and 20-bit serialization factors.
  • Supports the optional polarity inversion and bit reversal features.
Transmitter Buffer
  • The 1.5-V PCML output buffer conditions the high-speed serial data for transmission into the physical medium.
  • Programmable differential output voltage (VOD )
  • Programmable pre-emphasis
  • Programmable VCM current strength
  • Programmable slew rate
  • On-chip biasing for common-mode voltage (TX VCM )
  • Differential OCT (85, 100, 120, and 150 Ω )
  • Transmitter output tristate
  • Receiver detect (for the PCIe receiver detection function)