USB104 A7: Artix-7 FPGA Development Board

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The first Digilent board to adhere to an industry-standard form factor, the USB104 A7 brings power and versatility to your PC/104 stackable PC. The board measures 95.89 mm x 90.17 mm and provides the standard mounting holes with standoffs included.


The USB104 A7 features the industrial temperature rated Xilinx Artix-7 XC7A100T. Artix®-7 devices provide the highest performance-per-watt fabric making the USB104 A7 ideal for size, weight, and power (SWaP) constrained projects.




I/O is provided with on-board LEDs and push-buttons, and, of course, three 12-pin Pmod ports. A SYZYGY-compatible Zmod port is available as well, allowing for high-speed signal acquisition and generation. An onboard USB hub and controller conveniently interfaces the USB104 A7 with JTAG, UART, and a parallel data interface (DPTI) through a single connection. The DPTI data transfer interface provides host-to-FPGA data transfer and is easily managed with Digilent’s Adept 2 application. This ease of use and high-speed data transfer is especially useful for deployed systems.



Artix-7 100T (XC7A100T-1CSG324I) FPGA

  • Logic Cells: 101,440
  • DSP Slices: 240
  • Memory: 4,860
  • GTP 6.6Gb/s Transceivers: 8
  • I/O Pins: 300



  • 512MB DDR3/DDR3L with 16-bit bus @ 800Mbps (1.5V) or 667Mbps (1.35V) 

16MB Quad-SPI Flash for storing FPGA configuration 



  • Powered from a 5V external DC adapter attached to barrel jack or from USB header  
  • Automatic switching between USB and external power, with external receiving preference 
  • NCP380 load switch limits USB current to 2 amps and reduces in-rush current



  • USB-JTAG Programming circuitry 
  • USB-UART bridge 
  • Adept DPTI/DSPI data transfer interface for high speed host to FPGA data transfer 
  • Onboard USB hub eliminates the need for multiple USB cable connections 


Push-buttons and LEDs

  • 2 push-buttons 
  • 4 LEDs 


Expansion Connectors

  • One standard SYZYGY port (Zmod) 
  • Three standard Pmod ports 


Form Factor

  • PCB adheres to PC/104 form factor and includes the standard mounting holes 
  • Board is 3.775” x 3.550” (95.89 mm x 90.17 mm).


What's Included

  • USB104 A7-100T board with four 0.6" standoffs
  • 1.5m USB 2.0 A to B shielded cable
  • 30W, 5V, 6A power supply with US and EU adapters


Additional Information


Important Dates

Enrollment Begin: Oct 5 2020

Enrollment Ends: Dec 6 2020

RoadTesters Selected: Dec 7 2020 (estimated)

Product Shipped: DEc 10 2020

RoadTesting Begins: Dec 17 2020

Reminder/Update Email: Jan 17 2021

Submit Reviews By: Feb 17 2021

*The element14 RoadTest Staff will send this reminder/update email.

**If a RoadTester is unable to meet the deadline, please notify the RoadTest Program Lead, , as soon as possible before the deadline.


Terms and Conditions

Digilent USB104 A7: Artix-7 FPGA Development Board – RoadTest

Terms and Conditions

These are the terms and conditions which govern the Digilent USB104 A7: Artix-7 FPGA Development Board RoadTest contest. This Contest requires participants to submit an application indicating their previous experience with this type of equipment/component, information on what they would do to test the equipment/component, and the applicant’s desire to post a thorough review of their experience with images, photos, or other supplemental materials. Participants will be required to meet the Conditions for Participation.  The winners of this RoadTest will receive the item(s) listed below. RoadTest Reviews are due no later than 60 days after the receipt of the item(s). No other prizes are offered.

The Principal terms of the Competition:

The following words and phrases are used in these terms and conditions and have the meanings given to them below.


Key dates:

Applications Close: midnight (GMT) on Dec 6 2020

Announcement of Winner (estimated): Dec 7 2020

Prize:  Digilent USB104 A7: Artix-7 FPGA Development Board

Additional Prizes: none

Competition Site:

Site or element14 Community:

Judges: members of the element14 community team chosen at the Organiser’s discretion.

Judging Criteria, All of the following which will have equal weighting:

· Demonstrated competence with the technologies including links or descriptions of past projects

· Qualifications as indicated by current job role and/or schooling/vocational training;

· A thorough description of how the prize would be tested;

· Likelihood that the Applicant will blog about the prize and provide a review on;

· Originality;

· Innovation.

Organiser: Premier Farnell plc (registered in England and Wales under company number 876412) whose registered office is at Farnell House, Forge Lane, Leeds, UK

Conditions for Qualification: in addition to meeting the requirements of these terms, all persons applying to take part in the Contest (each one an Applicant) must:

· Provide a RoadTest application describing what he/she would do if awarded the Prize including similar previous projects, product experience and qualifications

Terms: these terms and conditions which govern the Competition and to which the Organiser reserves the right to make changes from time to time and the latest version of these Terms from time to time will be posted to the Site.

  1. Eligibility
  2. Applications:
  3. Selecting Winners:
  4. Liability:
  5. General:

1.1 Save as set out in these Terms, the Contest is open to any natural or legal person, firm or company or group of natural persons or unincorporated body.

1.2 All Applicants must be aged at least 18 at the time of their application.

1.3 Applicants must not enter the RoadTest if doing so or taking part may:

1.3.1 cause the Organiser and/or themselves to be in breach of any agreement (including but not limited to any contract of employment) to which they are a party or in breach of any law, regulation or rule having the force of law to which the Organiser or the Applicant may be subject or any policy of the Organiser or the Sponsor;

1.3.2 Require the Organiser to obtain any licence, authorisation or permission to deal with the Applicant; or

1.3.3 Be in breach of any policy or practice of their employer. Some employers prohibit or restrict their employees from taking part in competitions such as these or receiving prizes under them and the Organiser respects those policies and practices.

The Organiser reserves the right to disqualify any Application made in breach of these Terms and to reject any Application which it reasonably believes may be or become in breach. The Organiser reserves the right to require evidence in such form as the Organiser may reasonably require of any Applicant’s compliance with any of these Terms and to disqualify any Applicant or Participant who cannot provide such evidence reasonably promptly.

1.4 Multiple applications are not permitted.

1.5 Applications may not be submitted by an agent whether acting on behalf of an undisclosed principal or otherwise.

1.6 The Contest is NOT open to:

1.6.1 Any person or entity who is a resident or national of any country which is subject to sanctions, embargoes or national trade restrictions of the United States of America, the European Union or the United Kingdom;

1.6.2 Any employee, director, member, shareholder (as appropriate) or any of their direct families (parents, siblings, spouse, partner, children) (“Direct Families”) of the Organiser and Sponsors; or

2.1 Each Applicant must fully complete and submit a RoadTest Application by the Application Close.

2.2 By submitting a Registration Form, each Applicant:

2.2.1 Authorises the Organiser to use his or her personal data (as defined in the Data Protection Act 1998) for the purposes of running and promoting the RoadTest;

2.2.2 Authorises the Organizer to copy, reproduce and publish their application should they be accepted as a Participant;

2.2.3 Will be deemed to have read, accepted and agree to be bound by these Terms. Applicants are advised to print and keep safe these Terms;

2.2.4 Authorises the Organiser to copy, reproduce and use the Application and/or Review for the purposes of the RoadTest and as otherwise contemplated by these Terms. The Organiser will not be responsible for any inaccuracy, error or omission contained in any reproduction or use of the Project Blogs.

2.2.5 Licenses the Organiser to use the intellectual property in the Project (IP) for the purposes of this Contest. As between the Applicant and the Organiser the IP remains owned by the Applicant.

2.2.6 Grants the Organiser the right to use his or her likeness, photographs, logos, trademarks, audio or video recordings without restriction for the purposes of Contest or the promotion of it or the Site;

2.2.7 Agrees to participate positively in all publicity surrounding the Contest;

2.2.8 Agrees to be responsible for all expenses and costs incurred by him or her in preparing for, entering and participating in the Contest (save for any expenses expressly agreed by the Organiser to be borne by it in these Terms);

2.2.9 Confirms that he or she owns all IP used in his or her application or Project or Blogs and indemnifies the Organiser from any claim by a third party that use of any material provided by an Applicant to the Organiser infringes the intellectual property rights of any third party;

2.2.10 Agrees not to act in any way or fail to act in any way or be associated with any cause or group which would have a negative impact on the reputation of the Organiser and/or the RoadTest.

2.3 All applications submitted to this RoadTest must meet the following criteria:

2.3.1 Applicants must be the author, creator and owner of the proposed review idea. Applicants must not submit someone else’s idea;

2.3.2 The proposed application must be reasonably achievable by the within the time constraints of the Contest;

2.3.3 Applications must not include or propose any of the following, the inclusion of which shall render any proposed application ineligible:

(a) Applications which relate to socially taboo topics, such as illicit drug use or sexual gratification;

(b) Applications that are or could reasonably be considered to be illegal, immoral, discriminatory or offensive as determined by the Organiser;

(c) Applications in relation to them which if accepted would infringe or breach any of the policies or terms of access or use of the Site.

2.4 No Application may contain any of the hazardous substances identified by Article 4 of Directive 2002/95/EC of the European Parliament on the Restrictions on the Use of Substances in Electronic and Electrical Equipment ("the Directive") or the use of such hazardous substances in the in any such Project must not exceed the maximum concentration values set out in the Directive.

3.1 Winners will be selected by the Organiser on the basis of the quality of his or her application and its adherence to these Terms.

3.2 The total number of Winners selected will be at least the minimum number set out above but the actual number is at the sole discretion of the Organizer and/or the Sponsor, if applicable.

3.3 The Organiser will use all reasonable efforts to announce the Winners via an update to the RoadTest page by the date listed above.

3.4 Winners agree to take part in all publicity which the Organiser or the Sponsor wishes to use to promote the RoadTest, the Products featured or other Contests with which the Organiser may be connected from time to time.

3.5 Details of the Winners may also be published in the media.

3.6 Winners are responsible for all applicable taxes, duties or other charges payable in relation to any prize.


4.1 The Organiser hereby excludes all and any Liability arising out of the Contest or the acceptance, use, quality, condition, suitability or performance of any Prize, even where that Liability may arise from the Organiser’s negligence.

4.2 Nothing in these Terms will affect any Liability of the Organiser for death or personal injury arising from its negligence, for breach of Part II of the Consumer Protection Act 1987 (in the event that any entrant is entitled to claim rights under the Consumer Protection Act 1987) or for any matter in relation to which it would be illegal for the Organiser to exclude or to attempt to exclude its Liability.

4.3 Subject to 4.2, neither the Organiser, any parent company nor any subsidiary of the Organiser or such parent company or any of their directors, officers and employees (together referred to in these terms and the ‘Associates’) makes any guarantee, warranty or representation of any kind, express or implied, with respect to this Competition or the Prizes potentially available under it. Neither the Organiser nor any of its Associates shall be responsible for any Liability that may arise out of or in connection with person’s participation in this Competition, the claiming, redemption or value of any prizes under it, the use or enjoyment of such prizes or any events or circumstances arising out of or in connection with any of them. Any implied warranties of condition, merchantability or suitability or fitness for purpose of any of them are hereby expressly excluded. Wherever used in these Terms, ‘Liability’ shall mean any and all costs, expenses, claims, damages, actions, proceedings, demands, losses and other liabilities (including legal fees and costs on a full indemnity basis) arising directly or indirectly out of or in connection with the matter concerned.

5.1 The RoadTest is organised and sponsored by the Organiser. The Organiser reserves the right to delegate all or any of its powers, rights and obligations arising in relation to the RoadTest to any Associate and certain such rights and powers are assumed by the Organiser on behalf of itself and each Associate. Reference to “Organiser” shall be deemed to include reference to each Associate.

5.2 The RoadTest may be terminated at any time if there are, in the sole opinion of the Organiser, an insufficient number of entries, or if the Applications are not of an appropriate standard for a competition of this nature. The Organiser has the right to cancel or suspend the RoadTest at any time due to circumstances outside its reasonable control.

5.3 The Organiser shall have the sole discretion to disqualify (without correspondence or right of appeal) any Applicant it considers to be adversely affecting the process or the operation of the RoadTest or to be in breach of these Terms or to be acting in a disruptive manner or with intent to annoy, abuse, threaten or harass any other Applicant or Participant.

5.4 The Organiser has the right to amend or add to these Terms from time to time. Revised Terms and Conditions will be posted on the Contest Site and it is a condition of entry to the RoadTest that Applicants agree to comply with these Terms and, if appropriate, such Terms as amended from time to time.

5.5 Headings are for convenience only and do not affect the interpretation or construction of these Terms and Conditions.

5.6 These Terms and the operation of the Contest shall be governed by and construed in accordance with English Law and any claim or matter arising under these Terms shall be subject to the exclusive jurisdiction of the English courts.

Comment List
  • We got five roadtest reports from five kits image

  • Been delving around to only prove what you mentioned earlier, this won't work on 2018.3


    I thought once Vivado is finished with the rest is down to SDK and therefore version agnostic. However my build errors relate to the fact system.mss hasn't built properly. I can read this file in the workspace folder and it describes each IP block by version....its building the BSP based on those and probably from something in the Vivado side of the workspace, which in my case contains many of the older IP blocks only.


    I'm reluctant at the moment to upgrade my old setup as currently it works for my purposes, sorry. If I mess it up and/or the licensing I'll probably have a right job getting it going again ! That said I do need to get brought into the current day with either a version that is 2020 or by using Vitis.

  • Vivado / SDK can be very picky when it comes to versions - for the sort of reasons you describe. I doubt that you'll be able to get a 2019.1 project running on 2018.3.


    I do have "Stop at program entry" set in the debug configuration (which is not on by default) in addition to the breakpoint in main. As you can see from my video, "Stop at program entry" seems to show that is starts in getSignedRawFromVolt. The breakpoint in main is never hit.

  • I'm currently setup for Vivado 2018.3. I'm not very knowledgeable yet on manipulating the various versions of Vivado and SDK such as workspaces; I know TCL commands almost always break when using a different version where the IP blocks are different. Anyway it seems that if the Vivado part was dispensed with then the ELF or bit stream is already created and my version of SDK should work for the test.....that was my idea anyway.


    I downloaded the example and ran up SDK: I also use Ubuntu and launch SDK from Vivado so that wasn't a simple task as the software didn't seem to be readily available to launch. What I did was open an old project in Vivado, open SDK, bin the project and then create a new one from the Digilent demo folder. However I don't even get as far as you did as the project won't build. This is probably due to my include paths being wrong. I'm still investigating as this is forcing me to better understand how Vivado and SDK interact and delving deeper into some of the project properties, until now everything was 'hidden' and automatically taken care of as I ran through my build process from top to bottom.


    A daft question that I should know the answer to - is a breakpoint on the curley brackets actually working? I usually place the breakpoint to a line of code.


    What are the settings in your debug configuration? Again I'm not expert at configuring those manually yet but I note there is one called 'stop at main', which when my projects work always seems to be ticked.

  • Yes - I used the barrel jack. I notice that USB power seems just enough to power the Artix-7 but if you plug in the Zmod then it's clearly not enough.

  • Hey ,

    I'm not going to use Zmod in my roadtest, but here's a suggestion: "Have you connected the AC Power supply to the barrel jack? (With the adapter given in the kit):. Because initially I had problems when I used the board by powering it with USB alone. So try using external power supply if you're not using it right now.

    Hope this helps!

    Good luck!

  • Hi


    I sometimes find the Digilent forum is quiet, which is surprising given the number of boards they make and sell and therefore must have a strong user base. I'll try and have a look tonight for you by running up without a ZMoD attached; if you hear nothing back prompt me again, as I've likely become immersed in something else !


    I'm currently investigating the DPTI transfer capability of this board along with the bespoke Digilent IP block.


    Hey, fellow road testers - I seem to be having an odd problem with the provided USB104 A7 sample projects for the Zmod DAC / Zmod ADC. I've asked on the Digilent forum, but had no reply. Has anyone got any ideas? I'd rather rule out PBKAC before this issue goes in my road test!

    Problems with sample Zmod SDK project for USB104 A7


    The problem occurs in the same project provided for both ZMods and seems to occur whether the Zmod hardware is connected or not. If anyone has a chance to try it out that would be really helpful. You just need to open the SDK project, program the FPGA with the pre-compiled bitstream and run it.

  • My board has arrived now and initial tests check out 100%; thank you for selecting me.

  • Important Dates Update:


    Enrollment Begin: Oct 5 2020

    Enrollment Ends: Dec 6 2020

    RoadTesters Selected: Dec 7 2020 (estimated)

    Product Shipped: DEc 10 2020

    RoadTesting Begins: Dec 17 2020

    Reminder/Update Email: Jan 17 2021

    Submit Reviews By: Feb 17 2021

    *The element14 RoadTest Staff will send this reminder/update email.

    **If a RoadTester is unable to meet the deadline, please notify the RoadTest Program Lead, , as soon as possible before the deadline.