Xilinx Virtex UltraScale+ FPGAs - Chapter 4: Receiver

Chapter 4
Receiver
This secon shows how to congure and use each of the funconal blocks inside the receiver
(RX). Each GTM transceiver includes an independent receiver made up of a PCS and PMA. The
following gure shows the blocks of the GTM transceiver RX. High-speed serial data ows from
traces on the board into the PMA of the GTM transceiver RX, into the PCS, and nally into the
interconnect logic.
Figure 36: GTM Transciever RX Block Diagram
Polarity
FIFO
PRBS
Checker
RX
Interface
FEC
Gray
Encoder
Pre-
Coder
RX PCS
DFE/
FFE
RX EQ SIPOADC
RX PMA
To RX Parallel Data
(Near-End PCS Loopback)
From RX Parallel Data
(Far-End PCS Loopback)
X20221-053018
The key elements within the GTM transceiver RX are:
1. RX Analog Front End
2. RX Equalizer
3. RX CDR
4. RX Fabric Clock Output Control
5. RX Margin Analysis
6. RX Pre-Coder
7. RX Gray Encoder
8. RX Polarity Control
9. RX Paern Checker
10. RX Buer
Chapter 4: Receiver
UG581 (v1.0) January 4, 2019 www.xilinx.com
Virtex UltraScale+ GTM Transceivers 84
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