Compatible Boards

This section of the documentation aims to list all of the development boards for which compatibility with the Robust Ethernet FMC has been checked, and to list constraints and any notes concerning special requirements or limitations with the board.

List of boards #

The following development boards have been verified compatible with the Robust Ethernet FMC. For more detailed information regarding compatibility with a particular development board, including the availability of an example design, click on the name of the board in the table below.

Zynq-7000 boards #

Zynq Ultrascale+ boards #

Zynq UltraScale+ RFSoC boards #

Series-7 boards #

Ultrascale and Ultrascale+ boards #

Other boards #

Compatibility requirements #

If you need to determine the compatibility of a development board that is not listed here, or you are designing a carrier board to mate with the Ethernet FMC, please check your board against the list of requirements below.

VADJ #

The development board must have the ability to supply a VADJ voltage of either 1.8VDC or 2.5VDC. The Ethernet FMC has an EEPROM containing IPMI data to be used by a power management device. If the development board has such a power management device, the correct VADJ will be applied automatically on power-up. Note that some development boards require the VADJ voltage to be configured by a DIP switch or jumper placement.

Port 0 #

• FMC pins LA00, LA02, LA03, LA04, LA05, LA06, LA07, LA08 must be connected to the FPGA
• All of the above pins must be connected to the same I/O bank
• Ideally, LA00 should be routed to a clock capable pin

Port 1 #

• FMC pins LA01, LA06, LA09, LA10, LA11, LA12, LA13, LA14, LA15, LA16 must be connected to the FPGA
• All of the above pins must be connected to the same I/O bank
• Ideally, LA01 should be routed to a clock capable pin

Port 2 #

• FMC pins LA17, LA19, LA20, LA21, LA22, LA23, LA24, LA25 must be connected to the FPGA
• All of the above pins must be connected to the same I/O bank
• Ideally, LA17 should be routed to a clock capable pin

Port 3 #

• FMC pins LA18, LA26, LA27, LA28, LA29, LA30, LA31, LA32 must be connected to the FPGA
• All of the above pins must be connected to the same I/O bank
• Ideally, LA18 should be routed to a clock capable pin

If any of LA00, LA01, LA17 or LA18 are not connected to a clock capable pin, you may experience difficulty achieving timing closure in your FPGA design. In some cases, timing closure can be still be achieved using non-clock capable pins by using carefully designed timing constraints.

Limitations when using HR (high-range) I/Os #

Some FMC carriers such as the ZedBoard, AC701, KC705, ZC702 and ZC706 have FMC connectors that route to HR (high-range) I/Os. Although HR I/Os can be operated from 1.2V to 3.3V, when it comes to LVDS they are actually limited to the I/O standard LVDS_25 (according to UG471). For this reason, we recommend using the 2.5V version Robust Ethernet FMC on these carriers. If you are using the 2.5V version Robust Ethernet FMC on these carriers, then you do not need to implement the work-arounds described in this section.

Using Robust Ethernet FMC 1.8V with HR I/Os #

The Robust Ethernet FMC has a 125MHz clock which is routed to the FMC connector as an LVDS signal in compliance with the VITA 57.1 standard. On the aforementioned carriers, this signal is received by the FPGA on a HR bank and therefore must be defined in your Vivado design as LVDS_25. This would normally imply that your I/O banks should be powered at 2.5V, which would conflict with the 1.8V requirement of the Robust Ethernet FMC.

If you must use the 1.8V version Robust Ethernet FMC on a carrier with an FMC connector that connects to HR I/Os, then you have two options to get around the limitation:

Option 1: Use an alternative clock source #

If you can supply the 125MHz MAC clock from another source, such as a precision clock oscillator on the FPGA development board, then you do not need to define the Ethernet FMC’s LVDS clock in your HDL design. This is the ideal solution, but is not always possible.

Option 2: Use the work-around #

To get around this limitation, Xilinx proposes a work-around in answer record 43989. To implement the work-around, you need to be able to make a hardware modification to your carrier board.

1. Add a 100 ohm external termination resistor to the FPGA input pins that receive the 125MHz LVDS clock signal.

2. Use 2.5V I/O standards in the Vivado design:

   • Define the clock in your Vivado design using the IOSTANDARD: LVDS_25.
   • Define the other FMC I/Os using the IOSTANDARD: LVCMOS_25 (we are required to use 2.5V standards on the entire bank).

3. Configure your carrier to power VADJ at 1.8V.

In other words, your Vivado design must be configured for VADJ of 2.5V but you will actually power VADJ at 1.8V. This is a valid work-around which is described by answer record 43989, with the condition that an external termination resistor must be installed. The reason that you need an external termination resistor is that the circuit for producing the internal termination resistor expects a power supply that corresponds to the IOSTANDARDs defined in the Vivado design. According to answer record 43989, it is prohibited to enable the internal differential termination resistor (DIFF_TERM=TRUE) if you configure your design for one supply voltage and power the I/O banks at another.

Vod (magnitude of the differential voltage) = 450mV (worst case)
Vocm (common mode voltage) = (1600 + 900)/2 = 1250mV (worst case)

Board notes #

ZedBoard #

See note ¹ for more information regarding the VADJ options.

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.

Setting VADJ #

The VADJ setting on this development board is determined by a pin header labelled J18. It should be set to 1.8V or 2.5V depending on the voltage specification of the Ethernet FMC being used.

AC701 #

See note ¹ for more information regarding the VADJ options.

Connectors #

• HPC: Satisfies all of the Ethernet FMC requirements.

KC705 #

See note ¹ for more information regarding the VADJ options.

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.
• HPC: Satisfies all of the Ethernet FMC requirements.

VC707 #

See note ² for more information regarding the VADJ options.

Connectors #

• HPC1: Satisfies all of the Ethernet FMC requirements.
• HPC2: Satisfies all of the Ethernet FMC requirements.

VC709 #

See note ² for more information regarding the VADJ options.

Connectors #

• HPC: Satisfies all of the Ethernet FMC requirements.

ZC702 #

See note ¹ for more information regarding the VADJ options.

Connectors #

• LPC1: Satisfies all of the Ethernet FMC requirements.
• LPC2: Satisfies all of the Ethernet FMC requirements.

ZC706 #

See note ¹ for more information regarding the VADJ options.

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.
• HPC: Pins LA18_CC and LA17_CC of the HPC connector are routed to non-clock-capable pins so they cannot properly receive the RGMII receive clocks for ports 2 and 3 of the Ethernet FMC. However this connector satisfies all of the requirements for ports 0 and 1 (note however that there is no example design for this connector at this time).

PicoZed FMC Carrier Card V2 #

Note that the choice of VADJ depends on the SoM being used on this carrier.

When using the PicoZed SoM 7015 or 7020 #

When using the PicoZed SoM 7030 #

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.

MicroZed FMC Carrier #

See note ¹ for more information regarding the VADJ options.

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.

Mini-ITX 7100 Base Kit #

The Mini-ITX cannot be used with any version of the Ethernet FMC. The FMC connector on this carrier was positioned such that the FMC card would face inwards, with the I/O connectors (in this case the RJ45 connectors) pointing towards the center of the board. In the case of the Ethernet FMC, the Zynq-7000 device and heat-sink would block access to the RJ45 connectors, making them unusable.

UltraZed EG PCIe Carrier Card #

See note ² for more information regarding the VADJ options.

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.

UltraZed EV Carrier Card #

Connectors #

• HPC: Satisfies all of the Ethernet FMC requirements.

VADJ #

This board has a fixed 1.8V VADJ voltage.

ML605 #

See note ³ for more information regarding the VADJ options.

Example designs #

No example designs are currently available for this development board.

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.
• HPC: Satisfies all of the Ethernet FMC requirements.

KCU105 #

See note ² for more information regarding the VADJ options.

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.
• HPC: Satisfies all of the Ethernet FMC requirements.

ZCU102 Rev-D #

See note ² for more information regarding the VADJ options.

Connectors #

• HPC0: Satisfies all of the Ethernet FMC requirements.
• HPC1: The I/O pins for port 2 are routed to separate I/O banks by this connector, making it unusable. The other ports however may be used.

ZCU102 #

See note ² for more information regarding the VADJ options.

Connectors #

• HPC0: Satisfies all of the Ethernet FMC requirements.
• HPC1: The I/O pins for port 2 are routed to separate I/O banks by this connector, making it unusable. The other ports however may be used.

ZCU104 #

See note ² for more information regarding the VADJ options.

Connectors #

• LPC: Satisfies all of the Ethernet FMC requirements.

ZCU106 #

See note ² for more information regarding the VADJ options.

Connectors #

• HPC0: Satisfies all of the Ethernet FMC requirements.
• HPC1: This connector only has LA00-LA16 pins connected to the FPGA, therefore it can only support ports 0 and 1.

ZCU111 #

See note ² for more information regarding the VADJ options.

Connectors #

• FMC+: Satisfies all of the Ethernet FMC requirements.

ZCU208 #

See note ² for more information regarding the VADJ options.

Example designs #

No example designs are currently available for this development board.

Connectors #

• FMC+: Satisfies all of the Ethernet FMC requirements.

VCU108 #

See note ² for more information regarding the VADJ options.

Connectors #

• HPC0: Satisfies all of the Ethernet FMC requirements.
• HPC1: Satisfies all of the Ethernet FMC requirements.

VCU110 #

The Xilinx VCU110 cannot be used with any Ethernet FMC. The VCU110 board’s FMC connectors are only partially routed to the FPGA. Many I/Os that are required by the Ethernet FMC are not connected on this board.

VCU118 #

See note ² for more information regarding the VADJ options.

Connectors #

• HPC: Satisfies all of the Ethernet FMC requirements.
• FMC+: Satisfies all of the Ethernet FMC requirements.

HTG-840 #

See note ² for more information regarding the VADJ options.

Example designs #

No example designs are currently available for this development board.

Connectors #

• HPC: Satisfies all of the Ethernet FMC requirements.

Arria 10 Attila #

Example designs #

No example designs are currently available for this development board. Please contact REFLEX CES for support with this carrier.

Connectors #

• HPC: Satisfies all of the Ethernet FMC requirements.

TEBF0808 #

See note ² for more information regarding the VADJ options.

Configuration #

DIP switch S5 must be properly configured for correct boot and VADJ voltage. Use one of the following settings depending on your desired boot mode.

DIP Switch S5 #

1. S5-3: Don’t care - is user defined (by CPLD)
2. S5-4: Must be ON for FMC_VADJ 1.8V (OFF sets FMC_VADJ to 1.2V which is not supported by Ethernet FMC)

General board notes #

• The TEBF0808 requires a modified FSBL to setup clocks on the board before the bitstream is loaded and the application/OS is launched. The modifications are included in the example design repository and they are also described on the Trenz Wiki for the TE0808 StarterKit.

Mercury PE1-400 Base Board #

When using Mercury XU1 module #

See note ² for more information regarding the VADJ options.

Example designs #

No example designs are currently available for this development board. You can however download the pin constraints below:

• Mercury PE1-400 with XU1 module, FMC0
• Mercury PE1-400 with XU1 module, FMC1

Connectors #

• FMC0 (LPC): Satisfies all of the Ethernet FMC requirements.
• FMC1 (LPC): Satisfies all of the Ethernet FMC requirements.

Footnotes #