GTS JESD204C Intel® FPGA IP User Guide

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ID 813959
Date 4/01/2024
Public
Document Table of Contents
Document Table of Contents x
1. About the GTS JESD204C Intel® FPGA IP User Guide 2. Overview of the GTS JESD204C Intel® FPGA IP 3. Functional Description 4. Getting Started 5. Designing with the GTS JESD204C Intel® FPGA IP 6. GTS JESD204C Intel® FPGA IP Parameters 7. Interface Signals 8. Document Revision History for the GTS JESD204C Intel® FPGA IP User Guide
2. Overview of the GTS JESD204C Intel® FPGA IP x
2.1. Release Information 2.2. Device Family Support 2.3. GTS JESD204C Intel® FPGA IP Features 2.4. Performance and Resource Utilization
3. Functional Description x
3.1. Clocks 3.2. Local Extended Multiblock Clock 3.3. CRC Encoding/Decoding 3.4. Scrambler/Descrambler
3.1. Clocks x
3.1.1. Device Clock 3.1.2. Frame Clock and Link Clock 3.1.3. GTS Reset Sequencer Intel® FPGA IP Clock
3.2. Local Extended Multiblock Clock x
3.2.1. LEMC Counter
4. Getting Started x
4.1. Installing and Licensing Intel® FPGA IP Cores 4.2. Intel® FPGA IP Evaluation Mode 4.3. IP Catalog and Parameter Editor 4.4. GTS JESD204C IP Component Files 4.5. Creating a New Quartus® Prime Project 4.6. Parameterizing and Generating the IP 4.7. Compiling the GTS JESD204C IP Design 4.8. Programming an FPGA Device
5. Designing with the GTS JESD204C Intel® FPGA IP x
5.1. Configuring the GTS Reset Sequencer Intel® FPGA IP 5.2. Reset Initialization 5.3. Configuration Phase 5.4. Link Reinitialization 5.5. SYSREF Sampling 5.6. Interrupt and Error Handling 5.7. Multi-Device Synchronization 5.8. Deterministic Latency
5.2. Reset Initialization x
5.2.1. GTS JESD204C TX Reset Sequence 5.2.2. GTS JESD204C RX Reset Sequence
5.6. Interrupt and Error Handling x
5.6.1. Interrupt Configuration for TX and RX 5.6.2. Interrupt Top Half ISR Handler 5.6.3. Interrupt Bottom Half ISR Handler
5.7. Multi-Device Synchronization x
5.7.1. Multi-Device DAC Application for Subclass 1 5.7.2. Multi-Device ADC Application for Subclass 1
5.8. Deterministic Latency x
5.8.1. RBD Tuning Mechanism
7. Interface Signals x
7.1. Transmitter Signals 7.2. Receiver Signals
1. About the GTS JESD204C Intel® FPGA IP User Guide
2. Overview of the GTS JESD204C Intel® FPGA IP
3. Functional Description
4. Getting Started
5. Designing with the GTS JESD204C Intel® FPGA IP
6. GTS JESD204C Intel® FPGA IP Parameters
7. Interface Signals
8. Document Revision History for the GTS JESD204C Intel® FPGA IP User Guide

3.4. Scrambler/Descrambler

Both the scrambler and descrambler are designed in a 64-bit parallel implementation and the scrambling/descrambling order starts from the first octet with MSB first.
Figure 6. Scrambling/Descrambling Order

The GTS JESD204C TX and RX IP core support scrambling/descrambling of converter data by implementing a 64-bit parallel scrambler per TX lane and a 64-bit parallel descrambler per RX lane. The scrambler and descrambler are located in the GTS JESD204C IP MAC interfacing to the Avalon® streaming interface. During operation, the scrambler and descrambler must be enabled. Unlike the previous generation's design, disabling of scrambler and descrambler is not allowed.

The scrambling polynomial is:

x58 + x39 + 1

The descrambler is able to self-synchronize in 58 bits. During typical application where the reset value of the scrambler seed is different from the converter device to the FPGA logic device, the correct user data is recovered in the receiver in one link clock cycle as the link data width is 64 bits.

Level Two Title