F-tile Jesd204c Intel Fpga Ip Design Example User Guide (+ PDF)

Contents hide

1 F-Tile JESD204C Intel FPGA IP Design Example

2 About the F-Tile JESD204C Intel® FPGA IP Design Example User Guide

2.1 Intended Audience

3 F-Tile JESD204C Intel FPGA IP Design Example Quick Start Guide

3.1 Design Example Block Diagram

3.2 Software Requirements

3.3 Generating the Design

3.4 Simulating the Design Example Testbench

3.5 Compiling the Design Example

4 Detailed Description for the F-Tile JESD204C Design Example

4.1 System Components

4.2 F-Tile JESD204C Design Example Clock and Reset

4.3 F-Tile JESD204C Design Example Signals

4.4 F-Tile JESD204C Design Example Control Registers

5 Document Revision History for the F-Tile JESD204C Intel FPGA IP Design Example User Guide

6 Documents / Resources

7 Related Posts

F-Tile JESD204C Intel FPGA IP Design Example

About the F-Tile JESD204C Intel® FPGA IP Design Example User Guide

This user guide provides the features, usage guidelines, and detailed description about the design examples for the F-Tile JESD204C Intel® FPGA IP using Intel Agilex™ devices.

Intended Audience

This document is intended for:

Design architect to make IP selection during system level design planning phase
Hardware designers when integrating the IP into their system level design
Validation engineers during system level simulation and hardware validation phase

Related Documents
The following table lists other reference documents which are related to the F-Tile JESD204C Intel FPGA IP.

Table 1. Related Documents

Reference	Description
F-Tile JESD204C Intel FPGA IP User Guide	Provides information about the F-Tile JESD204C Intel FPGA IP.
F-Tile JESD204C Intel FPGA IP Release Notes	Lists the changes made for the F-Tile JESD204C F-Tile JESD204C in a particular release.
Intel Agilex Device Data Sheet	This document describes the electrical characteristics, switching characteristics, configuration specifications, and timing for Intel Agilex devices.

Acronyms and Glossary

Table 2. Acronym List

Acronym	Expansion
LEMC	Local Extended Multiblock Clock
FC	Frame clock rate
ADC	Analog to Digital Converter
DAC	Digital to Analog Converter
DSP	Digital Signal Processor
TX	Transmitter
RX	Receiver

Acronym	Expansion
DLL	Data link layer
CSR	Control and status register
CRU	Clock and Reset Unit
ISR	Interrupt Service Routine
FIFO	First-In-First-Out
SERDES	Serializer Deserializer
ECC	Error Correcting Code
FEC	Forward Error Correction
SERR	Single Error Detection (in ECC, correctable)
DERR	Double Error Detection (in ECC, fatal)
PRBS	Pseudorandom binary sequence
MAC	Media Access Controller. MAC includes protocol sublayer, transport layer, and data link layer.
PHY	Physical Layer. PHY typically includes the physical layer, SERDES, drivers, receivers and CDR.
PCS	Physical Coding Sub-layer
PMA	Physical Medium Attachment
RBD	RX Buffer Delay
UI	Unit Interval = duration of serial bit
RBD count	RX Buffer Delay latest lane arrival
RBD offset	RX Buffer Delay release opportunity
SH	Sync header
TL	Transport layer
EMIB	Embedded Multi-die Interconnect Bridge

Table 3. Glossary List

Term	Description
Converter Device	ADC or DAC converter
Logic Device	FPGA or ASIC
Octet	A group of 8 bits, serving as input to 64/66 encoder and output from the decoder
Nibble	A set of 4 bits which is the base working unit of JESD204C specifications
Block	A 66-bit symbol generated by the 64/66 encoding scheme
Line Rate	Effective data rate of serial link Lane Line Rate = (Mx Sx N’x 66/64 x FC) / L
Link Clock	Link Clock = Lane Line Rate/66.
Frame	A set of consecutive octets in which the position of each octet can be identified by reference to a frame alignment signal.
Frame Clock	A system clock which runs at the frame’s rate, that must be 1x and 2x link clock.

Term	Description
Samples per frame clock	Samples per clock, the total samples in frame clock for the converter device.
LEMC	Internal clock used to align the boundary of the extended multiblock between lanes and into the external references (SYSREF or Subclass 1).
Subclass 0	No support for deterministic latency. Data should be immediately released upon lane to lane deskew on receiver.
Subclass 1	Deterministic latency using SYSREF.
Multipoint Link	Inter-device links with 2 or more converter devices.
64B/66B Encoding	Line code that maps 64-bit data to 66 bits to form a block. The base level data structure is a block that starts with 2-bit sync header.

Table 4. Symbols

Term	Description
L	Number of lanes per converter device
M	Number of converters per device
F	Number of octets per frame on a single lane
S	Number of samples transmitted per single converter per frame cycle
N	Converter resolution
N’	Total number of bits per sample in the user data format
CS	Number of control bits per conversion sample
CF	Number of control words per frame clock period per link
HD	High Density user data format
E	Number of multiblock in an extended multiblock

F-Tile JESD204C Intel FPGA IP Design Example Quick Start Guide

The F-Tile JESD204C Intel FPGA IP design examples for Intel Agilex devices features a simulating testbench and a hardware design that supports compilation and hardware testing.
You can generate the F-Tile JESD204C design examples through the IP catalog in the Intel Quartus® Prime Pro Edition software.

Figure 1. Development Stages for the Design Example

Design Example Block Diagram

Figure 2. F-Tile JESD204C Design Example High-level Block Diagram

The design example consists of the following modules:

Platform Designer system
- F-Tile JESD204C Intel FPGA IP
- JTAG to Avalon Master bridge
- Parallel I/O (PIO) controller
- Serial Port Interface (SPI)—master module— IOPLL
- SYSREF generator
- Example Design (ED) Control CSR
- Reset sequencers
System PLL
Pattern generator
Pattern checker

Table 5. Design Example Modules

Components	Description
Platform Designer system	The Platform Designer system instantiates the F-Tile JESD204C IP data path and supporting peripherals.
F-Tile JESD204C Intel FPGA IP	This Platform Designer subsystem contains the TX and RX F-Tile JESD204C IPs instantiated together with the duplex PHY.
JTAG to Avalon Master bridge	This bridge provides system console host access to the memory-mapped IP in the design through the JTAG interface.
Parallel I/O (PIO) controller	This controller provides a memory-mapped interface for sampling and driving general purpose I/O ports.
SPI master	This module handles the serial transfer of configuration data to the SPI interface on the converter end.
SYSREF generator	The SYSREF generator uses the link clock as a reference clock and generates SYSREF pulses for the F-Tile JESD204C IP. Note: This design example uses the SYSREF generator to demonstrate the duplex F-Tile JESD204C IP link initialization. In the F-Tile JESD204C subclass 1 system level application, you must generate the SYSREF from the same source as the device clock.
IOPLL	This design example uses an IOPLL to generate a user clock for transmitting data into the F-Tile JESD204C IP.
ED Control CSR	This module provides SYSREF detection control and status, and test pattern control and status.
Reset sequencers	This design example consists of 2 reset sequencers: Reset Sequence 0—Handles the reset to TX/RX Avalon® streaming domain, Avalon memory-mapped domain, core PLL, TX PHY, TX core, and SYSREF generator. Reset Sequence 1—Handles the reset to RX PHY and RX core.
System PLL	Primary clock source for the F-tile hard IP and EMIB crossing.
Pattern generator	The pattern generator generates a PRBS or ramp pattern.
Pattern checker	The pattern checker verifies the PRBS or ramp pattern received, and flags an error when it finds a mismatch of data sample.

Software Requirements

Intel uses the following software to test the design examples in a Linux system:

Intel Quartus Prime Pro Edition software
Questa*/ModelSim* or VCS*/VCS MX simulator

Generating the Design

To generate the design example from the IP parameter editor:

Create a project targeting Intel Agilex F-tile device family and select the desired device.
In the IP Catalog, Tools ➤ IP Catalog, select F-Tile JESD204C Intel FPGA IP.
Specify a top-level name and the folder for your custom IP variation. Click OK. The parameter editor adds the top-level .ip file to the current project automatically. If you are prompted to manually add the .ip file to the project, click Project ➤ Add/ Remove Files in Project to add the file.
Under the Example Design tab, specify the design example parameters as described in Design Example Parameters.
Click Generate Example Design.

The software generates all design files in the sub-directories. These files are required to run simulation and compilation.

Design Example Parameters
The F-Tile JESD204C Intel FPGA IP parameter editor includes the Example Design tab for you to specify certain parameters before generating the design example.

Table 6. Parameters in the Example Design Tab

Parameter	Options	Description
Select Design	System Console Control None	Select the system console control to access the design example data path through the system console.
Simulation	On, Off	Turn on for the IP to generate the necessary files for simulating the design example.
Synthesis	On, Off	Turn on for the IP to generate the necessary files for Intel Quartus Prime compilation and hardware demonstration.
HDL format (for simulation)	Verilog VDHL	Select the HDL format of the RTL files for simulation.
HDL format (for synthesis)	Verilog only	Select the HDL format of the RTL files for synthesis.

Parameter	Options	Description
Generate 3- wire SPI module	On, Off	Turn on to enable 3-wire SPI interface instead of 4-wire.
Sysref mode	One-shot Periodic Gapped periodic	Select whether you want the SYSREF alignment to be a one-shot pulse mode, periodic, or gapped periodic, based on your design requirements and timing flexibility. One-shot—Select this option to enable SYSREF to be a one-shot pulse mode. The sysref_ctrl[17] register bit’s value is 0. After the F-Tile JESD204C IP reset deasserts, change the sysref_ctrl[17] register’s value from 0 to 1, then to 0, for a one-shot SYSREF pulse. Periodic—SYSREF in periodic mode has 50:50 duty cycle. SYSREF period is ESYSREF_MULP. Gapped periodic—SYSREF has programmable duty cycle of granularity of 1 link clock cycle. SYSREF period is ESYSREF_MULP. For out-of-range duty cycle setting, the SYSREF generation block should automatically infer 50:50 duty cycle. Refer to the SYSREF Generator section for more information about the SYSREF period.
Select board	None	Select the board for the design example. None—This option excludes hardware aspects for the design example. All the pin assignments will be set to virtual pins.
Test Pattern	PRBS-7 PRBS-9 PRBS-15 PRBS-23 Ramp	Select pattern generator and checker test pattern. Pattern Generator—JESD204C support PRBS pattern generator per data sample. This means that the width of the data is N+CS option. PRBS pattern generator and checker are useful for creating data sample stimulus for testing and it is not compatible with PRBS test mode on the ADC/DAC converter. Ramp Pattern Generator—JESD204C link layer operates normally but the transport later is disabled and the input from the formatter is ignored. Each lane transmits an identical octet stream that increments from 0x00 to 0xFF and then repeats. Ramp pattern test is enable by prbs_test_ctl. PRBS Pattern Checker—JESD204C PRBS scrambler is self synchronizing and it is expected that when the IP core is able to decode link up, the scrambling seed is already synchronized. PRBS scrambling seed will take up 8 octets to self initialize. Ramp Pattern Checker—JESD204C scrambling is self synchronizing and it is expected that when the IP core is able to decode link up, the scrambling seed is already synchronized. The first valid octet is loaded as the ramp initial value. Subsequent data must increment up to 0xFF and roll over to 0x00. Ramp pattern checker should check for identical pattern across all lanes.
Enable internal serial loopback	On, Off	Select internal serial loopback.
Enable Command Channel	On, Off	Select command channel pattern.

Directory Structure
The F-Tile JESD204C design example directories contain generated files for the design examples.

Figure 3. Directory Structure for F-Tile JESD204C Intel Agilex Design Example

Table 7. Directory Files

Folders	Files
ed/rtl	tx j204c_f_tx_ip.qsys j204c_f tx_ss.qsys altera_s10_user_rst_clkgate_0.ip j204c f_se_outbuf_1bit.ip
simulation/mentor	modelsim_sim.tcl tb_top_waveform.do
simulation/synopsys	vcs vcs_sim.sh tb_top_wave_ed.do vcsmx vcsmx_sim.sh tb_top_wave_ed.do

Simulating the Design Example Testbench

The design example testbench simulates your generated design.

Figure 4. Procedure

To simulate the design, perform the following steps:

Change the working directory to <example_design_directory>/simulation/<Simulator>.
In the command line, run the simulation script. The table below shows the commands to run the supported simulators.

Simulator	Command
Questa/ModelSim	vsim -do modelsim_sim.tcl
Questa/ModelSim	vsim -c -do modelsim_sim.tcl (without Questa/ ModelSim GUI)
VCS	sh vcs_sim.sh
VCS MX	sh vcsmx_sim.sh

The simulation ends with messages that indicate whether the run was successful or not.

Figure 5. Successful Simulation
This figure shows the successful simulation message for VCS simulator.

Compiling the Design Example

To compile the compilation-only example project, follow these steps:

Ensure compilation design example generation is complete.
In the Intel Quartus Prime Pro Edition software, open the Intel Quartus Prime Pro Edition project <example_ design_ directory>/ed/quartus.
On the Processing menu, click Start Compilation.

Detailed Description for the F-Tile JESD204C Design Example

The F-Tile JESD204C design example demonstrates the functionality of data streaming using loopback mode.
You can specify the parameters settings of your choice and generate the design example.
The design example is available only in duplex mode for both Base and PHY variant. You can choose Base only or PHY only variant but the IP would generate the design example for both Base and PHY.

Note: Some high data rate configurations may fail timing. To avoid timing failure, consider specifying lower frame clock frequency multiplier (FCLK_MULP) value in the Configurations tab of the F-Tile JESD204C Intel FPGA IP parameter editor.

System Components

The F-Tile JESD204C design example provides a software-based control flow that uses the hard control unit with or without system console support.

The design example enables an auto link up in internal and external loopback modes.

JTAG to Avalon Master Bridge
The JTAG to Avalon Master Bridge provides a connection between the host system to access the memory-mapped F-Tile JESD204C IP and the peripheral IP control and status registers through the JTAG interface.

Figure 6. System with a JTAG to Avalon Master Bridge Core

Note: System clock must be at least 2X faster than the JTAG clock. The system clock is mgmt_clk (100MHz) in this design example.

Parallel I/O (PIO) Core
The parallel input/output (PIO) core with Avalon interface provides a memory-mapped interface between an Avalon memory-mapped slave port and general purpose I/O ports. The I/O ports connect either to on-chip user logic, or to I/O pins that connect to devices external to the FPGA.

Figure 7. PIO Core with Input Ports, Output Ports, and IRQ Support
By default, the Platform Designer component disables the Interrupt Service Line (IRQ).

The PIO I/O ports are assigned at the top level HDL file ( io_ status for input ports, io_ control for output ports).

The table below describes the signal connectivity for the status and control I/O ports to the DIP switch and LED on the development kit.

Table 8. PIO Core I/O Ports

Port	Bit	Signal
Out_port	0	USER_LED SPI programming done
Out_port	31:1	Reserved
In_port	0	USER_DIP internal serial loopback enable Off = 1 On = 0
	1	USER_DIP FPGA-generated SYSREF enable Off = 1 On = 0
	31:2	Reserved.

SPI Master
The SPI master module is a standard Platform Designer component in the IP Catalog standard library. This module uses the SPI protocol to facilitate the configuration of external converters (for example, ADC, DAC, and external clock generators) via a structured register space inside these devices.

The SPI master has an Avalon memory-mapped interface that connects to the Avalon master (JTAG to Avalon master bridge) via the Avalon memory-mapped interconnect. The SPI master receives configuration instructions from the Avalon master.

The SPI master module controls up to 32 independent SPI slaves. The SCLK baud rate is configured to 20 MHz (divisible by 5).
This module is configured to a 4-wire, 24-bit width interface. If the Generate 3-Wire SPI Module option is selected, an additional module is instantiated to convert the 4-wire output of the SPI master to 3-wire.

IOPLL
The IOPLL generates the clock required to generate frame_clk and link_clk. The reference clock to the PLL is configurable but limited to the data rate/factor of 33.

For design example that supports data rate of 24.33024 Gbps, the clock rate for frame_clk and link_clk is 368.64 MHz.
For design example that supports data rate of 32 Gbps, the clock rate for frame_clk and link_clk is 484.848 MHz.

SYSREF Generator
SYSREF is a critical timing signal for data converters with F-Tile JESD204C interface.

The SYSREF generator in the design example is used for the duplex JESD204C IP link initialization demonstration purpose only. In the JESD204C subclass 1 system level application,you must generate SYSREF from the same source as the device clock.

For the F-Tile JESD204C IP, the SYSREF multiplier (SYSREF_MULP) of the SYSREF control register defines the SYSREF period, which is n-integer multiple of the E parameter.

You must ensure E*SYSREF_MULP ≤16. For example, if E=1, the legal setting for SYSREF_MULP must be within 1–16, and if E=3, the legal setting for SYSREF_MULP must be within 1–5.

Note: If you set an out-of-range SYSREF_MULP, the SYSREF generator will fix the setting to SYSREF_MULP=1.
You can select whether you want the SYSREF type to be a one-shot pulse, periodic, or gapped periodic through the Example Design tab in the F-Tile JESD204C Intel FPGA IP parameter editor.

Table 9. Examples of Periodic and Gapped Periodic SYSREF Counter

E	SYSREF_MULP	SYSREF PERIOD (ESYSREF_MULP 32)	Duty Cycle	Description
1	1	32	1..31 (Programmable)	Gapped Periodic
1	1	32	16 (Fixed)	Periodic
1	2	64	1..63 (Programmable)	Gapped Periodic
1	2	64	32 (Fixed)	Periodic
1	16	512	1..511 (Programmable)	Gapped Periodic
1	16	512	256 (Fixed)	Periodic
2	3	19	1..191 (Programmable)	Gapped Periodic
2	3	192	96 (Fixed)	Periodic
2	8	512	1..511 (Programmable)	Gapped Periodic
2	8	512	256 (Fixed)	Periodic
2	9 (Illegal)	64	32 (Fixed)	Gapped Periodic
2	9 (Illegal)	64	32 (Fixed)	Periodic

Table 10. SYSREF Control Registers
You can dynamically reconfigure the SYSREF control registers if the register setting is different than the setting you specified when you generated the design example. Configure the SYSREF registers before the F-Tile JESD204C Intel FPGA IP is out of reset. If you select the external SYSREF generator through the
sysref_ctrl[7] register bit, you can ignore the settings for SYSREF type, multiplier, duty cycle and phase.

Bits	Default Value	Description
sysref_ctrl[1:0]	2‘b00: One-shot 2‘b01: Periodic 2’b10: Gapped periodic	SYSREF type. The default value depends on the SYSREF mode setting in the Example Design tab in the F-Tile JESD204C Intel FPGA IP parameter editor.
sysref_ctrl[6:2]	5’b00001	SYSREF multiplier. This SYSREF_MULP field is applicable to periodic and gapped-periodic SYSREF type. You must configure the multiplier value to ensure the ESYSREF_MULP value is between 1 to 16 before the F-Tile JESD204C IP is out of reset. If the ESYSREF_MULP value is out of this range, the multiplier value defaults to 5’b00001.
sysref_ctrl[7]	Duplex datapath: 1’b1 Simplex TX or RX datapath: 1’b0	SYSREF select. The default value depends on the data path setting in the Example Design tab in the F-Tile JESD204C Intel FPGA IP parameter editor. 0: Simplex TX or RX (External SYSREF) 1: Duplex (Internal SYSREF)
sysref_ctrl[16:8]	9’h0	SYSREF duty cycle when SYSREF type is periodic or gapped periodic. You must configure the duty cycle before the F-Tile JESD204C IP is out of reset. Maximum value = (ESYSREF_MULP32)-1 For example: 50% duty cycle = (ESYSREF_MULP32)/2 The duty cycle defaults to 50% if you do not configure this register field, or if you configure the register field to 0 or more than the maximum value allowed.
sysref_ctrl[17]	1’b0	Manual control when SYSREF type is one-shot. Write 1 to set the SYSREF signal to high. Write 0 to set the SYSREF signal to low. You need to write a 1 then a 0 to create a SYSREF pulse in one-shot mode.
sysref_ctrl[31:18]	22’h0	Reserved.

Reset Sequencers
This design example consists of two reset sequencers:

Reset Sequence 0—Handles the reset to TX/RX Avalon streaming domain, Avalon memory-mapped domain, core PLL, TX PHY, TX core, and SYSREF generator.
Reset Sequence 1—Handles the reset to RX PHY and RX Core.

3-Wire SPI
This module is optional to convert SPI interface to 3-wire.

System PLL
F-tile has three on-board system PLLs. These system PLLs are the primary clock source for hard IP (MAC, PCS, and FEC) and EMIB crossing. This means that, when you use the system PLL clocking mode, the blocks are not clocked by the PMA clock and do not depend on a clock coming from the FPGA core. Each system PLL only generates the clock associated with one frequency interface. For example, you need two system PLLs to run one interface at 1 GHz and one interface at 500 MHz. Using a system PLL allows you to use every lane independently without a lane clock change affecting a neighboring lane.
Each system PLL can use any one of eight FGT reference clocks. System PLLs can share a reference clock or have different reference clocks. Each interface can choose which system PLL it uses, but, once chosen, it is fixed, not reconfigurable using dynamic reconfiguration.

Related Information
F-tile Architecture and PMA and FEC Direct PHY IP User Guide

More information about the system PLL clocking mode in Intel Agilex F-tile devices.

Pattern Generator and Checker
The pattern generator and checker are useful for creating data samples and monitoring for testing purposes.
Table 11. Supported Pattern Generator

Pattern Generator	Description
PRBS pattern generator	The F-Tile JESD204C design example PRBS pattern generator supports the following degree of polynomials: PRBS23: X23+X18+1 PRBS15: X15+X14+1 PRBS9: X9+X5+1 PRBS7: X7+X6+1
Ramp pattern generator	The ramp pattern value increments by 1 for every subsequent sample with the generator width of N, and rolls over to 0 when all bits in the sample are 1. Enable the ramp pattern generator by writing a 1 to bit 2 of the tst_ctl register of the ED control block.
Command channel ramp pattern generator	The F-Tile JESD204C design example supports command channel ramp pattern generator per lane. The ramp pattern value increments by 1 per 6 bits of command words. The starting seed is an increment pattern across all lanes.

Table 12. Supported Pattern Checker

Pattern Checker	Description
PRBS pattern checker	The scrambling seed in the pattern checker is self- synchronized when the F-Tile JESD204C IP achieves deskew alignment. The pattern checker requires 8 octets for the scrambling seed to self-synchronize.
Ramp pattern checker	The first valid data sample for each converter (M) is loaded as the initial value of the ramp pattern. Subsequent data samples values must increase by 1 in each clock cycle up to the maximum and then roll over to 0.

Pattern Checker	Description
	For example, when S=1, N=16 and WIDTH_MULP = 2, the data width per converter is S * WIDTH_MULP * N = 32. The maximum data sample value is 0xFFFF. The ramp pattern checker verifies that identical patterns are received across all converters.
Command channel ramp pattern checker	The F-Tile JESD204C design example supports command channel ramp pattern checker. The first command word (6 bits) received is loaded as the initial value. Subsequent command words in the same lane must increment up to 0x3F and roll over to 0x00. The command channel ramp pattern checker checks for ramp patterns across all lanes.

F-Tile JESD204C TX and RX IP
This design example allows you to configure each TX/RX in simplex mode or duplex mode.
Duplex configurations allow IP functionality demonstration using either internal or external serial loopback. CSRs within the IP are not optimized away to allow for IP control and status observation.

F-Tile JESD204C Design Example Clock and Reset

The F-Tile JESD204C design example has a set of clock and reset signals.

Table 13.Design Example Clocks

Clock Signal	Direction	Description
mgmt_clk	Input	LVDS differential clock with frequency of 100 MHz.
refclk_xcvr	Input	Transceiver reference clock with frequency of data rate/factor of 33.
refclk_core	Input	Core reference clock with the same frequency as refclk_xcvr.
in_sysref	Input	SYSREF signal. Maximum SYSREF frequency is data rate/(66x32xE).
sysref_out	Output
txlink_clk rxlink_clk	Internal	TX and RX link clock with frequency of data rate/66.
txframe_clk rxframe_clk	Internal	TX and RX frame clock with frequency of data rate/33 (FCLK_MULP=2) TX and RX frame clock with frequency of data rate/66 (FCLK_MULP=1)
tx_fclk rx_fclk	Internal	TX and RX phase clock with frequency of data rate/66 (FCLK_MULP=2) TX and RX phase clock is always high (1’b1) when FCLK_MULP=1
spi_SCLK	Output	SPI baud rate clock with frequency of 20 MHz.

When you load the design example into an FPGA device, an internal ninit_done event ensures that the JTAG to Avalon Master bridge is in reset as well as all the other blocks.

The SYSREF generator has its independent reset to inject intentional asynchronous relationship for the txlink_clk and rxlink_clk clocks. This method is more comprehensive in emulating the SYSREF signal from an external clock chip.

Table 14. Design Example Resets

Reset Signal	Direction	Description
global_rst_n	Input	Push button global reset for all blocks, except the JTAG to Avalon Master bridge.
ninit_done	Internal	Output from Reset Release IP for the JTAG to Avalon Master bridge.
edctl_rst_n	Internal	The ED Control block is reset by JTAG to Avalon Master bridge. The hw_rst and global_rst_n ports do not reset the ED Control block.
hw_rst	Internal	Assert and deassert hw_rst by writing to the rst_ctl register of the ED Control block. mgmt_rst_in_n asserts when hw_rst is asserted.
mgmt_rst_in_n	Internal	Reset for Avalon memory-mapped interfaces of various IPs and inputs of reset sequencers: j20c_reconfig_reset for F-Tile JESD204C IP duplex Native PHY spi_rst_n for SPI master pio_rst_n for PIO status and control reset_in0 port of reset sequencer 0 and 1 The global_rst_n, hw_rst, or edctl_rst_n port asserts reset on mgmt_rst_in_n.
sysref_rst_n	Internal	Reset for SYSREF generator block in the ED Control block using the reset sequencer 0 reset_out2 port. The reset sequencer 0 reset_out2 port deasserts the reset if the core PLL is locked.
core_pll_rst	Internal	Resets the core PLL through the reset sequencer 0 reset_out0 port. The core PLL resets when mgmt_rst_in_n reset is asserted.
j204c_tx_avs_rst_n	Internal	Resets the F-Tile JESD204C TX Avalon memory- mapped interface through reset sequencer 0. The TX Avalon memory-mapped interface asserts when mgmt_rst_in_n is asserted.
j204c_rx_avs_rst_n	Internal	Resets the F-Tile JESD204C TX Avalon memory- mapped interface through reset sequencer 1. The RX Avalon memory-mapped interface asserts when mgmt_rst_in_n is asserted.
j204c_tx_rst_n	Internal	Resets the F-Tile JESD204C TX link and transport layers in txlink_clk, and txframe_clk, domains. The reset sequencer 0 reset_out5 port resets j204c_tx_rst_n. This reset deasserts if the core PLL is locked, and the tx_pma_ready and tx_ready signals are asserted.
j204c_rx_rst_n	Internal	Resets the F-Tile JESD204C RX link and transport layers in, rxlink_clk,and rxframe_clk domains.

Reset Signal	Direction	Description
		The reset sequencer 1 reset_out4 port resets j204c_rx_rst_n. This reset deasserts if the core PLL is locked, and the rx_pma_ready and rx_ready signals are asserted.
j204c_tx_rst_ack_n	Internal	Reset handshakes signal with j204c_tx_rst_n.
j204c_rx_rst_ack_n	Internal	Reset handshakes signal with j204c_rx_rst_n.

Figure 8. Timing Diagram for the Design Example Resets

F-Tile JESD204C Design Example Signals

Table 15. System Interface Signals

Signal	Direction	Description
Clocks and Resets
mgmt_clk	Input	100 MHz clock for system management.
refclk_xcvr	Input	Reference clock for F-tile UX QUAD and System PLL. Equivalent to data rate/factor of 33.
refclk_core	Input	Core PLL reference clock. Applies the same clock frequency as refclk_xcvr.
in_sysref	Input	SYSREF signal from external SYSREF generator for JESD204C Subclass 1 implementation.
sysref_out	Output	SYSREF signal for JESD204C Subclass 1 implementation generated by the FPGA device for design example link initialization purpose only.

Signal	Direction	Description
SPI
spi_SS_n[2:0]	Output	Active low, SPI slave select signal.
spi_SCLK	Output	SPI serial clock.
spi_sdio	Input/Output	Output data from the master to external slave. Input data from external slave to master.

Signal	Direction	Description
Note:When Generate 3-Wire SPI Module option is enabled.
spi_MISO Note: When Generate 3-Wire SPI Module option is not enabled.	Input	Input data from external slave to the SPI master.
spi_MOSI Note: When Generate 3-Wire SPI Module option is not enabled.	Output	Output data from SPI master to the external slave.

Signal	Direction	Description
ADC/DAC
tx_serial_data[LINK*L-1:0]	Output	Differential high speed serial output data to DAC. The clock is embedded in the serial data stream.
tx_serial_data_n[LINK*L-1:0]
rx_serial_data[LINK*L-1:0]	Input	Differential high speed serial input data from ADC. The clock is recovered from the serial data stream.
rx_serial_data_n[LINK*L-1:0]

Signal	Direction	Description
General Purpose I/O
user_led[3:0]	Output	Indicates the status for the following conditions: [0]: SPI programming done [1]: TX link error [2]: RX link error [3]: Pattern checker error for Avalon streaming data
user_dip[3:0]	Input	User mode DIP switch input: [0]: Internal serial loopback enable [1]: FPGA-generated SYSREF enable [3:2]: Reserved

Signal	Direction	Description
Out-of-band (OOB) and Status
rx_patchk_data_error[LINK-1:0]	Output	When this signal is asserted, it indicates pattern checker has detected error.
rx_link_error[LINK-1:0]	Output	When this signal is asserted, it indicates JESD204C RX IP has asserted interrupt.
tx_link_error[LINK-1:0]	Output	When this signal is asserted, it indicates JESD204C TX IP has asserted interrupt.
emb_lock_out	Output	When this signal is asserted, it indicates JESD204C RX IP has achieved EMB lock.
sh_lock_out	Output	When this signal is asserted, it indicates JESD204C RX IP sync header is locked.

Signal	Direction	Description
Avalon Streaming
rx_avst_valid[LINK-1:0]	Input	Indicates whether the converter sample data to the application layer is valid or invalid. 0: Data is invalid 1: Data is valid
rx_avst_data[(TOTAL_SAMPLE*N)-1:0 ]	Input	Converter sample data to the application layer.

F-Tile JESD204C Design Example Control Registers

The F-Tile JESD204C design example registers in the ED Control block use byte-addressing (32 bits).

Table 16. Design Example Address Map
These 32-bit ED Control block registers are in the mgmt_clk domain.

Component	Address
F-Tile JESD204C TX IP	0x000C_0000 – 0x000C_03FF
F-Tile JESD204C RX IP	0x000D_0000 – 0x000D_03FF
SPI Control	0x0102_0000 – 0x0102_001F
PIO Control	0x0102_0020 – 0x0102_002F
PIO Status	0x0102_0040 – 0x0102_004F
Reset Sequencer 0	0x0102_0100 – 0x0102_01FF
Reset Sequencer 1	0x0102_0200 – 0x0102_02FF
ED Control	0x0102_0400 – 0x0102_04FF
F-Tile JESD204C IP transceiver PHY Reconfig	0x0200_0000 – 0x023F_FFFF

Table 17. Register Access Type and Definition
This table describes the register access type for Intel FPGA IPs.

Access Type	Definition
RO/V	Software read-only (no effect on write). The value may vary.
RW	Software reads and returns the current bit value. Software writes and sets the bit to the desired value.
RW1C	Software reads and returns the current bit value. Software writes 0 and has no effect. Software writes 1 and clears the bit to 0 if the bit has been set to 1 by hardware. Hardware sets the bit to 1. Software clear has higher priority than hardware set.

Table 18. ED Control Address Map

Offset	Register Name
0x00	rst_ctl
0x04	rst_sts0
*continued…*

Offset	Register Name
0x10	rst_sts_detected0
0x40	sysref_ctl
0x44	sysref_sts
0x80	tst_ctl
0x8c	tst_err0

Table 19. ED Control Block Control and Status Registers

Byte Offset	Register	Name	Access	Reset	Description
0x00	rst_ctl	rst_assert	RW	0x0	Reset control. [0]: Write 1 to assert reset. (hw_rst) Write 0 again to deassert reset. [31:1]: Reserved.
0x04	rst_sts0	rst_status	RO/V	0x0	Reset status. [0]: Core PLL locked status. [31:1]: Reserved.
0x10	rst_sts_dete cted0	rst_sts_set	RW1C	0x0	SYSREF edge detection status for internal or external SYSREF generator. [0]: Value of 1 Indicates a SYSREF rising edge is detected for subclass 1 operation. Software may write 1 to clear this bit to enable new SYSREF edge detection. [31:1]: Reserved.
0x40	sysref_ctl	sysref_contr ol	RW	Duplex datapath One-shot: 0x00080	SYSREF control. Refer to Table 10 on page 17 for more information about the usage of this register.
				Periodic:	Note: The reset value depends on
				0x00081	the SYSREF type and F-Tile
				Gapped- periodic:	JESD204C IP data path parameter settings.
				0x00082
				TX or RX data
				path
				One-shot:
				0x00000
				Periodic:
				0x00001
				Gapped-
				periodic:
				0x00002
0x44	sysref_sts	sysref_statu s	RO/V	0x0	SYSREF status. This register contains the latest SYSREF period and duty cycle settings of the internal SYSREF generator. Refer to Table 9 on page 16 for the legal value of the SYSREF period and duty cycle.
*continued…*

Byte Offset	Register	Name	Access	Reset	Description
					[8:0]: SYSREF period. When the value is 0xFF, the SYSREF period = 255 When the value if 0x00, the SYSREF period = 256. [17:9]: SYSREF duty cycle. [31:18]: Reserved.
0x80	tst_ctl	tst_control	RW	0x0	Test control. Use this register to enable different test patterns for the pattern generator and checker. [1:0] = Reserved field [2] = ramp_test_ctl 1’b0 = Enables PRBS pattern generator and checker 1’b1 = Enables ramp pattern generator and checker [31:3]: Reserved.
0x8c	tst_err0	tst_error	RW1C	0x0	Error flag for Link 0. When the bit is 1’b1, it indicates an error has happened. You should resolve the error before writing 1’b1 to the respective bit to clear the error flag. [0] = Pattern checker error [1] = tx_link_error [2] = rx_link_error [3] = Command pattern checker error [31:4]: Reserved.