F-Tile JESD204C Intel® FPGA IP User Guide

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Date 1/26/2024
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Document Table of Contents
Document Table of Contents x
1. About the F-Tile JESD204C Intel® FPGA IP User Guide 2. Overview of the F-Tile JESD204C Intel® FPGA IP 3. Functional Description 4. Getting Started 5. Designing with the F-Tile JESD204C Intel® FPGA IP 6. F-Tile JESD204C Intel® FPGA IP Parameters 7. Interface Signals 8. Control and Status Registers 9. F-Tile JESD204C Intel® FPGA IP User Guide Archives 10. Document Revision History for the F-Tile JESD204C Intel® FPGA IP User Guide
2. Overview of the F-Tile JESD204C Intel® FPGA IP x
2.1. Release Information 2.2. Device Family Support 2.3. F-Tile 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. System PLL
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. F-Tile JESD204C IP Component Files 4.5. Creating a New Intel® Quartus® Prime Project 4.6. Parameterizing and Generating the IP 4.7. Compiling the F-Tile JESD204C IP Design 4.8. Programming an FPGA Device
5. Designing with the F-Tile JESD204C Intel® FPGA IP x
5.1. Reset Initialization 5.2. Configuration Phase 5.3. Link Reinitialization 5.4. SYSREF Sampling 5.5. Interrupt and Error Handling 5.6. Multi-Device Synchronization 5.7. Deterministic Latency 5.8. Transceiver Toolkit
5.1. Reset Initialization x
5.1.1. F-Tile JESD204C TX Reset Sequence 5.1.2. F-Tile JESD204C RX Reset Sequence
5.5. Interrupt and Error Handling x
5.5.1. Interrupt Configuration for TX and RX 5.5.2. Interrupt Top Half ISR Handler 5.5.3. Interrupt Bottom Half ISR Handler
5.6. Multi-Device Synchronization x
5.6.1. Multi-Device DAC Application for Subclass 1 5.6.2. Multi-Device ADC Application for Subclass 1
5.7. Deterministic Latency x
5.7.1. RBD Tuning Mechanism
7. Interface Signals x
7.1. Transmitter Signals 7.2. Receiver Signals
8. Control and Status Registers x
8.1. Transmitter and Receiver Registers
1. About the F-Tile JESD204C Intel® FPGA IP User Guide
2. Overview of the F-Tile JESD204C Intel® FPGA IP
3. Functional Description
4. Getting Started
5. Designing with the F-Tile JESD204C Intel® FPGA IP
6. F-Tile JESD204C Intel® FPGA IP Parameters
7. Interface Signals
8. Control and Status Registers
9. F-Tile JESD204C Intel® FPGA IP User Guide Archives
10. Document Revision History for the F-Tile JESD204C Intel® FPGA IP User Guide

7.1. Transmitter Signals

Table 19.  Top-level Transmitter IP Core Signals
Signal Width Direction Description
JESD204C TX MAC Clocks and Resets
j204c_pll_refclk 1 Input TX PLL reference clock for the transceiver.
j204c_syspll_div2_clk 1 Output System PLL divided by 2 clock.
j204c_txlink_clk

1

Input

This clock is equal to the TX data rate divided by 66. Generated from the same PLL as txframe_clk.
j204c_txlclk_ctrl

1

Input

Generated from the same PLL as txlink_clk and txframe_clk. This clock control acts as a phase information for j204c_txlink_clk to handle CDC between j204c_txlink_clk and j204c_txframe_clk. This clock control is tied to 1 because j204c_txlink_clk is always the same or 2 times slower than j204c_txframe_clk. Every j204c_txlink_clk positive clock edge is aligned to j204c_txframe_clk positive clock edge.
j204c_txframe_clk

1

Input

This signal is synchronous with txlink_clk. Frequency is equal or 2x txlink_clk, based on the selected option for the frame clock frequency multiplier parameter. Generated from the same PLL as txlink_clk.

j204c_txfclk_ctrl

1

Input

Generated from the same PLL as j204c_txlink_clk and j204c_txframe_clk. This clock acts as a phase information of j204c_txframe_clk to handle CDC crossing from j204c_txframe_clk to j204c_txlink_clk. If FCLK_MULP = 1, this clock is tied to 1 because every j204c_txframe_clk positive clock edge is aligned to the j204c_txlink_clk positive clock edge. However, if FCLK_MULP=2, this signal pulses high for every j204c_txframe_clk period which has the positive clock edge aligned to the j204c_txlink_clk positive clock edge.
j204c_tx_avs_clk

1

Input

Avalon® memory-mapped interface clock.
reconfig_xcvr_clk 1

Input

PMA Avalon® memory-mapped interface clock. In duplex mode, both TX and RX share the same reconfiguration pins.
j204c_tx_rst_n

1

Input

Active-low asynchronous reset signal for MAC LL and TL.

Assertion triggers reset sequence to MAC and PHY. Reset sequence completion indicated by assertion tx_rst_ack_n.

Deassertion triggers out-of-reset sequence. Out of reset completion indicates by the deassertion of tx_rst_ack_n.

You must assert this reset signal if tx_avs_rst_n is asserted.

j204c_tx_avs_rst_n 1

Input

Active-low asynchronous reset signal for TX Avalon® memory-mapped interface.

This signal deasserts synchronous to tx_avs_clk.

j204c_tx_rst_ack_n 1 Output Asynchronous signal.

Acknowledgment indicator of the state of j204c_tx_rst_n.

reconfig_xcvr_reset 1 Input PMA Avalon® memory-mapped interface reset.

Active high signal. During duplex mode, both TX and RX share the same reconfiguration pins.

Intel recommends that you tie this signal to tx_avs_rst_n.

Signal

Width

Direction

Description

Transceiver Interface
tx_serial_data

L

Output

Differential high speed serial output data. The clock is embedded in the serial data stream.
tx_serial_data_n

L

Output

Differential high speed serial output data. The clock is embedded in the serial data stream.
reconfig_xcvr_read

1

Input

During duplex mode, both TX and RX share the same reconfiguration pins.

This signal is synchronous with reconfig_xcvr_clk.

reconfig_xcvr_write

1

Input

During duplex mode, both TX and RX share the same reconfiguration pins.

This signal is synchronous with reconfig_xcvr_clk.

reconfig_xcvr_address

log2(L) +18

Input

Each transceiver lanes address is 18 bits wide. The upper bits are lane select.

This signal is synchronous with reconfig_xcvr_clk.

reconfig_xcvr_readdata

32

Output

During duplex mode, both TX and RX share the same reconfiguration pins.

This signal is synchronous with reconfig_xcvr_clk.

reconfig_xcvr_writedata

32

Output

During duplex mode, both TX and RX share the same reconfiguration pins.

This signal is synchronous with reconfig_xcvr_clk.

reconfig_xcvr_waitrequest

1

Output

Wait request signal.

During duplex mode, both TX and RX share the same reconfiguration pins.

This signal is synchronous with reconfig_xcvr_clk.
reconfig_xcvr_byteenable 4 Input

Byte enable signal. If byteenable[3:0] is 4’b1111, uses 32-bit Dword; otherwise uses byte access.

This signal is synchronous with reconfig_xcvr_clk.

Signal

Width

Direction

Description

JESD204C TX MAC Avalon® Memory-Mapped Interface
j204c_tx_avs_chipselect

1

Input

This signal is synchronous to tx_avs_clk.

When this signal is present, the slave port ignores all Avalon® memory-mapped signals unless this signal is asserted. This signal must be used in combination with read or write. If the Avalon® memory-mapped bus does not support chip select, Intel recommends that you tie this port to 1.

j204c_tx_avs_address

10

Input

This signal is synchronous to tx_avs_clk.

For Avalon® memory-mapped slave, each slave access is based on byte-based offset. For example, address = 0 selects the first four bytes of the slave register and the address = 4 selects the next four bytes of the slave register space.

j204c_tx_avs_writedata

32

Input

This signal is synchronous to tx_avs_clk.

32-bit data for write transfers. The width of this signal and the j204c_tx_avs_readdata[31:0] signal must be the same if both signals are present.

j204c_tx_avs_read

1

Input

This signal is synchronous to tx_avs_clk.

This signal is asserted to indicate a read transfer. This is an active high signal and requires the j204c_tx_avs_readdata[31:0] signal to be in use.

j204c_tx_avs_write

1

Input

This signal is synchronous to tx_avs_clk.

This signal is asserted to indicate a write transfer. This is an active high signal and requires the j204c_tx_avs_writedata[31:0] signal to be in use.

j204c_tx_avs_readdata

32

Output

This signal is synchronous to tx_avs_clk.

32-bit data driven from the Avalon® memory-mapped slave to master in response to a read transfer.

j204c_tx_avs_waitrequest

1

Output

This signal is synchronous to tx_avs_clk.

This signal is asserted by the Avalon® memory-mapped slave to indicate that it is unable to respond to a read or write request. The F-Tile JESD204C Intel® FPGA IP ties this signal to 0 to return the data in the access cycle.

Signal

Width

Direction

Description

JESD204C TX MAC Avalon® Streaming Interface (Data Channel)
j204c_tx_avst_data

M*S*N*WIDTH_MULP

Input

The minimum data width = M*S*N. This signal is synchronous to txframe_clk. Indicates the converter samples that is processed by TL.

This signal indicates a 64-bit user data (per lane) at txlink_clk clock rate, where 8 octets are packed into a 64-bit data width per lane. The data format is big endian.

If L=1 and M*S*N*WIDTH_MULP=64, the first octet is located at bit[63:56], followed by bit[55:48], and the last octet is bit[7:0]. If more than one lane is instantiated, Lane 0 data is always located in the upper 64-bit. Data lane L’s data is located at bit[63:0], with the first octet position for lane L is at bit[63:56].

j204c_tx_avst_control M*S*WIDTH_MULP*CS

Input

Control bits to be inserted as part of CS parameter.

This signal is synchronous to txframe_clk.

j204c_tx_avst_valid

1

Input

Indicates whether the data from the application layer is valid or invalid. The Avalon® streaming sink interface in the TX core cannot be backpressured and assumes that the data is always valid on every cycle when the j204c_tx_avst_ready signal is asserted.

  • 0—data is invalid
  • 1—data is valid

This signal is synchronous to txframe_clk.

j204c_tx_avst_ready

1

Output

Indicates that the Avalon® streaming sink interface in the TX core is ready to accept data. The Avalon® streaming sink interface asserts this signal on the JESD204C transport state of USER_DATA phase. The ready latency is 0.

This signal is synchronous to txframe_clk.

Signal

Width

Direction

Description

JESD204C TX MAC Command (Command Channel)
j204c_tx_cmd_data

L*6

L*18

Input

Indicates a 6/18-bit user command (per lane) at txlink_clk clock rate. The data format is big endian. If more than one lane is instantiated, Lane 0 data is always located at the upper 18-bit or 6 bits of data, Lane L is located at bit[17:0] or bit[5:0], with the first command bit position for Lane L at bit[17] or bit[5].

This signal is synchronous to txlink_clk.

If CRC-12 is enabled, width is L*6. If standalone command channel, width is L*18.

j204c_tx_cmd_valid

1

Input

Indicates whether the command from the application layer is valid or invalid. The Avalon® streaming sink interface in the TX core cannot be backpressured and assumes that data is always valid on every cycle when the j204c_tx_cmd_ready signal is asserted.

  • 0—data is invalid
  • 1—data is valid

This signal is synchronous to txlink_clk.

j204c_tx_cmd_ready

1

Output

Indicates that the Avalon® streaming sink interface in the TX core is ready to accept command. The Avalon® streaming sink interface asserts this signal on the JESD204C link/transport state of USER_DATA phase. The ready latency is 0.

This signal is synchronous to txlink_clk.

Signal

Width

Direction

Description

JESD204C Interface
j204c_tx_sysref

1

Input

SYSREF signal for JESD204C Subclass 1 implementation.

For Subclass 0 mode, tie-off this signal to 0.

Signal

Width

Direction

Description

JESD204C TX MAC CSR
j204c_tx_csr_l

4

Output

Indicates the number of active lanes for the link. The transport layer can use this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_f

8

Output

Indicates the number of octets per frame. The transport layer uses this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_m

8

Output

Indicates the number of converters for the link. The transport layer uses this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_cs

2

Output

Indicates the number of control bits per sample. The transport layer uses this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_n

5

Output

Indicates the converter resolution. The transport layer uses this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_np

5

Output

Indicates the total number of bits per sample. The transport layer uses this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_s

5

Output

Indicates the number of samples per converter per frame cycle. The transport layer uses this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_hd

1

Output

Indicates the high density data format. The transport layer uses this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_cf

5

Output

Indicates the number of control words per frame clock period per link. The transport layer uses this signal as a compile-time parameter.

This signal is synchronous to tx_avs_clk.

j204c_tx_csr_e 8

Output

LEMC period.

This signal is synchronous to tx_avs_clk.

Signal

Width

Direction

Description

JESD204C TX MAC Out-of-band (OOB)
j204c_tx_int

1

Output

Asynchronous signal.

Interrupt pin for the F-Tile JESD204C Intel® FPGA IP.

Interrupt is asserted when any error or synchronization request is detected. Configure the tx_err_enable register to set the type of error that can trigger an interrupt.

j204c_tx2rx_lbdata L*66

Output

Output as 66-bit width data before the TX gearbox to connect to the RX core (same signal name) for 2-block loopback function.

If L>0, LSB of this bus is mapped to lane 0. MSB is mapped to lane L–1.

Input and multiplexed with RX Gearbox output when TX2RX loopback mode is enabled. This is to be connected to TX IP in duplex setup (same signal name) for TX2RX loopback function. if L>0, MSB of this bus is mapped to Lane0. LSB is mapped to Lane L-1.

This signal is synchronous to txlink_clk.

j204c_tx2rx_lbdata_gb L*64 Output

This output is valid when the 66/64 Gearbox is available.

This signal is synchronous to txphy_clk or sysclk.

Output as 64 bit width data after TX Gearbox. This signal is connected to RX IP (same signal name) for the Tx2Rx loopback function.

If L > 0, MSB of this bus is mapped to Lane 0. LSB is mapped to Lane L-1.

j204c_tx2rx_lbdata_gb_valid L Output

Assert to indicate j204c_tx2rx_lbdata_gb is valid. LSB is mapped to Lane 0, MSB is mapped to Lane L-1.

This signal is synchronous to txphy_clk or sysclk.

Note: For information about the transceiver PHY signals, refer to the Signal and Port Reference section in the F-tile Architecture and PMA and FEC Direct PHY IP User Guide.
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