GTS Transceiver PHY User Guide: Agilex™ 5 FPGAs and SoCs
ID
817660
Date
4/07/2025
Public
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1. GTS Transceiver Overview
2. GTS Transceiver Architecture
3. Implementing the GTS PMA/FEC Direct PHY Intel FPGA IP
4. Implementing the GTS System PLL Clocks Intel FPGA IP
5. Implementing the GTS Reset Sequencer Intel FPGA IP
6. GTS PMA/FEC Direct PHY Intel FPGA IP Example Design
7. Design Assistance Tools
8. Debugging GTS Transceiver Links with Transceiver Toolkit
9. Document Revision History for the GTS Transceiver PHY User Guide: Agilex™ 5 FPGAs and SoCs
3.1. IP Overview
3.2. Designing with the GTS PMA/FEC Direct PHY Intel FPGA IP
3.3. Configuring the GTS PMA/FEC Direct PHY Intel FPGA IP
3.4. Reconfigurable PHY
3.5. Signal and Port Reference
3.6. Bit Mapping for PMA, FEC, and PCS Mode PHY TX and RX Datapath
3.7. Clocking
3.8. Custom Cadence Generation Ports and Logic
3.9. Asserting Reset
3.10. Bonding Implementation
3.11. Configuration Register
3.12. Configuring the GTS PMA/FEC Direct PHY Intel FPGA IP for Hardware Testing
3.13. Configurable Quartus® Prime Software Settings
3.14. Hardware Configuration Using the Avalon® Memory-Mapped Interface
3.3.1. Preset IP Parameter Settings
3.3.2. Mode and Common Datapath Options
3.3.3. Reconfigurable PHY Settings
3.3.4. TX Datapath Options
3.3.5. RX Datapath Options
3.3.6. PMA Configuration Rules for Specific Protocol Mode Implementations
3.3.7. FEC Options
3.3.8. PCS Options
3.3.9. Avalon® Memory-Mapped Interface Options
3.3.10. Register Map IP-XACT Support
3.3.11. Analog Parameter Options
3.5.1. TX and RX Parallel and Serial Interface Signals
3.5.2. TX and RX Reference Clock and Clock Output Interface Signals
3.5.3. Reset Signals
3.5.4. FEC Signals
3.5.5. Custom Cadence Control and Status Signals
3.5.6. RX PMA Status Signals
3.5.7. TX and RX PMA and Core Interface FIFO Signals
3.5.8. Avalon Memory-Mapped Interface Signals
3.9.1. Reset Signal Requirements
3.9.2. Power On Reset Requirements
3.9.3. Reset Signals—Block Level
3.9.4. Run-time Reset Sequence—TX
3.9.5. Run-time Reset Sequence—RX
3.9.6. Run-time Reset Sequence—TX + RX
3.9.7. RX Data Loss/CDR Lock Loss (Auto-Recovery)
3.9.8. TX PLL Lock Loss
3.9.9. TX PLL Lock Loss Auto-Recovery (Soft CSR Enabled)
5.1. IP Requirements
5.2. IP Parameters
5.3. IP Port List
5.4. GTS Reset Sequencer Intel FPGA IP General Interface
5.5. GTS Reset Sequencer Intel FPGA IP Design Flow
5.6. GTS Reset Sequencer Intel FPGA IP Use Cases
5.7. Connecting the Reference Clock Buffer Status to the GTS Reset Sequencer Intel® FPGA IP
6.1. Instantiating the GTS PMA/FEC Direct PHY Intel FPGA IP
6.2. Generating the GTS PMA/FEC Direct PHY Intel FPGA IP Example Design
6.3. GTS PMA/FEC Direct PHY Intel FPGA IP Example Design Functional Description
6.4. Simulating the GTS PMA/FEC Direct PHY Intel FPGA IP Example Design Testbench
6.5. Compiling the GTS PMA/FEC Direct PHY Intel FPGA IP Example Design
6.6. Hardware Testing the GTS PMA/FEC Direct PHY Intel FPGA IP Example Design
6.7. GTS PMA/FEC Direct PHY Intel FPGA IP Reconfigurable PHY Example Design
6.8. Generating the GTS PMA/FEC Direct PHY Intel® FPGA IP Reconfigurable Example Design
6.9. GTS PMA/FEC Direct PHY Intel FPGA IP Reconfigurable PHY Example Design Functional Description
6.10. Simulating the GTS PMA/FEC Direct PHY Intel FPGA IP Reconfigurable PHY Example Design Testbench
6.11. Compiling the GTS PMA/FEC Direct PHY Intel FPGA IP Reconfigurable PHY Example Design
6.12. Hardware Testing the GTS PMA/FEC Direct PHY Intel FPGA IP Reconfigurable PHY Example Design
2.5.1. FEC Loopback Mode
Both Firecode and RS-FEC support a loopback mode, offering debugging options.
You can enable the FEC loopback mode parameter in the IP Parameter Editor GUI. When you enable the FEC loopback mode, the output of the TX FEC block is looped back to the RX FEC as shown in the following figure. For more information about enabling the FEC loopback mode refer to FEC Options. You can also enable the FEC loopback mode by configuring the fec_lpbk_en register (0x70000[1]).
Figure 22. FEC Loopback Mode
Note: The FEC loopback mode requires an additional step since the o_rx_is_lockedtodata signal is deasserted if the i_rx_serial_data is not toggling. This causes the hard IP blocks such as the TX/RX PMA Interface, PCS, FEC into a reset state and prevents any loopback in these digital blocks to function correctly. You must perform a write to the src_loopback_mode register (0x10018 bit[0]) to override the RX PMA status signals (refer to RX PMA Status Signals table for more information) so that these hard IP blocks can come out of reset and the FEC loopback mode can function.