F-Tile JESD204C Intel® FPGA IP User Guide

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Date 1/26/2024
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6. F-Tile JESD204C Intel® FPGA IP Parameters

Table 17.   F-Tile JESD204C Intel® FPGA IP Parameters
Parameter Value Description
Main Tab
Device family Intel® Agilex™ 7 Supports Intel® Agilex™ 7 F-Tile devices.
JESD204C wrapper
  • Both Base and PHY
Supports a single wrapper.
  • Both Base and PHY—generates both the base (data link layer and transport layer) and the transceiver PHY layer (hard PMA).
Data path
  • Receiver
  • Transmitter
  • Duplex
Select the operation modes. This selection enables or disables the receiver and transmitter supporting logic.
  • Receiver—instantiates the receiver to interface to the ADC.
  • Transmitter—instantiates the transmitter to interface to the DAC.
  • Duplex—instantiates the receiver and transmitter to interface to both the ADC and DAC.

JESD204C Subclass

  • 0
  • 1
Select the F-Tile JESD204C subclass modes.
  • 0—Set subclass 0
  • 1—Set subclass 1

Data rate

5.0–32.44032 Gbps Set the lane rate for each lane. The maximum rate is 32.44032 Gbps. Refer to Performance and Resource Utilization for more information.

Transceiver type

F-tile-FGT This shows the transceiver type supported. Only FGT transceivers on the F-tile are supported.
Bonding mode
  • Bonded
  • Non-bonded
Set the bonding modes.
  • Bonded—Select this option to minimize inter-lanes skew for the transmitter datapath.
  • Non-bonded—Select this option to disable inter-lanes skew control for the transmitter datapath.

PLL/CDR reference clock frequency

Variable Set the transceiver reference clock frequency for PLL and CDR/PLL or CDR. The frequency range available for you to choose depends on the data rate.
System PLL frequency Variable Specify the System PLL clock frequency used in the Tile.
Note: For Intel® Agilex™ 7 devices with F- transceiver tiles, the system PLL is outside of F-Tile JESD204C Intel® FPGA IP. Use this option to set the system PLL clock frequencies in the generated SDC constraint file. This setting does not directly affect the frequency of the system PLL.
Enable PMA Avalon® memory-mapped interface On, Off Enables the Avalon® memory-mapped interface to access PMA registers. The default value is On.
Enable debug endpoint for PMA Avalon® memory-mapped interface On, Off When enabled, the F-Tile JESD204C Intel® FPGA IP includes an embedded Native PHY Debug Master Endpoint that connects internally to a Avalon® memory-mapped slave interface. The Native PHY Debug Master Endpoint can access the reconfiguration space of the transceiver. It can perform certain test and debug functions via JTAG using the System Console.
JESD204C Configurations Tab

Lanes per converter device (L)

1–16 Set the number of lanes per converter device.

Converters per device (M)

1–32 Set the number of converters per converter device.

Octets per frame (F)

1–256 The number of octets per frame is derived from F= M*N'*S/(8*L).

Converter resolution (N)

1–32 Set the number of conversion bits per converter.

Transmitted bits per sample (N')

4–32 Set the number of transmitted bits per sample (JESD204 word size, which is in nibble group).
Note: If parameter CF equals to 0 (no control word), parameter N' must be larger than or equal to sum of parameter N and parameter CS (N' ≥ N + CS). Otherwise, parameter N' must be larger than or equal to parameter N (N'≥N).

Samples per converter per frame (S)

1–32 Set the number of transmitted samples per converter per frame.

Multiblocks in an extended multiblock (E)

1–32 Set the number of multiblock within an extended multiblock.

Control bits (CS)

0–3 Set the number of control bits per conversion sample.

Control words (CF)

0–31 Set the number of control words per frame clock period per link.

High-density user data format (HD)

0–1 Turn on this option to set the data format. This parameter controls whether a sample may be divided over more lanes.
  • 1 (On)—High Density format
  • 0 (Off)—Data should not cross the lane boundary
Sync header configuration (SH_CONFIG)
  • CRC-12
  • Standalone command channels
Set the sync header (SH) encoding configuration.
  • CRC-12—For the sync word to contain error detection information.
  • Standalone command channel—For the sync word to contain transmit commands and status information.
Frame clock frequency multiplier (FCLK_MULP) 1, 2 Select the frame clock frequency multiplier (FCLK). The default and recommended value is 1.
  • 1—Frame clock and link clock are at the same frequency.
  • 2—Frame clock frequency is two times the link clock frequency.
Frame data width multiplier (WIDTH_MULP) 1, 2, 4, 8 Select the data width multiplier between the application layer and transport layer.
Note: The multiplier value is auto-calculated based on the M, N, S, and F configurations. Select the smallest data width multiplier value on the list. Other data width multiplier values are not allowed.
Enable fabric to tile TX data pipestage (Transmitter) On, Off Enable pipeline stage in TX datapath to tile for timing improvement. Turning on requires additional resources.
  • Off—Do not insert any pipeline stage. Minimum latency.
  • On—Insert 1 pipeline stage.
Note: For high data rates, Intel recommends that you enable pipeline stages for better timing.
TX LEMC offset (Transmitter) 0–255 TX LEMC offset from SYSREF. The default value is 0.
EMB error threshold (Receiver) 1–8 EMB error threshold to unlock EMB FSM back to initialization state. The default value is 8.
SH error threshold (Receiver) 1–16 Sync header error threshold to unlock SH FSM back to initialization state. The default value is 16.
RX LEMC offset (Receiver) 0–255 RX LEMC offset from SYSREF. The default value is 0.
RBD offset (Receiver) 0–1023 Elastic buffer release point (reference to LEMC) for Subclass 1 usage. The default value is 0.

One full LEMC, N number means (LEMC – N) cycles to release data in elastic buffer when deskew alignment is achieved.

Enable ECC in M20K DCFIFO (Receiver) On, Off Turn on to enable ECC feature if M20K is used as FIFO.
Lane polarity attribute (Receiver)
  • Optimize away
  • Writable
Select whether you want the lane polarity attribute to be read-only (RO) or read and write (RW).
  • Optimize away—Select this option to enable the attribute to be read-only.
  • Writable—Select this option to enable the attribute to be read and write.

Applies only for RX.

Enable lane polarity detection (Receiver) 16'h0–16'hFFFF Specify the bit representing the polarity enable status of each lane. For example, LSB represents lane 0, LSB+1 represents lane 1, MSB represents lane 15, and so on.

This value depends on the number of lanes you specify.

Polarity inversion (Receiver) 16'h0–16'hFFFF Specify the bit representing the polarity inversion status of each lane. For example, LSB represents lane 0, LSB+1 represents lane 1, MSB represents lane 15, and so on.

This value depends on the number of lanes you specify.

Single lane mode (Receiver) On, Off Turn on only when you set the Sync header configuration parameter to Standalone command channel.
Multilink mode (Receiver)

On, Off

Turn on this parameter when you want to implement synchronization between multiple F-Tile JESD204C RX IP instances. When you turn on this parameter, the j204c_rx_dev_emblock_align and j204c_rx_alldev_emblock_align signals are present.

The IP uses the j204c_rx_dev_emblock_align and j204c_rx_alldev_emblock_align signals together with the j204c_rx_dev_lane_align and j204c_rx_alldev_lane_align signals to achieve multidevice synchronization.

Refer to Receiver Signals for more information about these signals.

Configurations and Status Registers Tab

Enable CSR optimization

On, Off

Turn on to optimize the usage of the registers, including the Avalon® memory-mapped interfaces.