Arria® V Device Handbook: Volume 2: Transceivers

ID 683573
Date 5/29/2020
Document Table of Contents Transmitter PMA Datapath

Table 8.  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 the optional polarity inversion and bit reversal features.
  • Supports 8, 10, 16, and 20-bit serialization factors in Arria V GX, SX, GT, ST, and GZ devices.
  • Additionally supports 64 and 80-bit serialization factors for 10-Gbps transceiver channels in Arria V ST and GT devices.
  • Additionally supports 32, 40, 64, and 80-bit serialization factors in Arria V GZ devices.
Transmitter Buffer
  • The 1.4-V (Arria V GZ Only) and 1.5-V pseudo current mode logic (PCML) output buffer conditions the high-speed serial data for transmission into the physical medium. Arria GZ supports 1.4 and 1.5V PCML.
  • Supports the following features:
  • 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)