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What is Xilinx XC7A100T-2FGG676i FPGA?


The Xilinx XC7A100T-2FGG676i device is a high performance FPGA (Field Programmable Gate Array) belonging to the Artix-7 family. With its abundant programmable logic, memory, DSP, and transceiver resources, the XC7A100T FPGA is well suited for networking, wireless, aerospace, medical, and video processing applications needing medium-to-high capacity programmable hardware.

This article explores the XC7A100T FPGA architecture, available resources and configurations, design considerations, comparison with other FPGAs and target applications which helps assess its fit for different projects.

XC7A100T FPGA Architecture

The Xilinx XC7A100T FPGA is fabricated using a 28nm process and is based on the Artix-7 FPGA architecture which consists of the following key components:

Configurable Logic Blocks (CLBs)

  • The basic logic building block comprising of Look-Up Tables (LUTs), flip-flops and multiplexers
  • The XC7A100T has 115,200 CLB slices, with each slice containing 4 LUTs and 8 flip-flops

Block RAM (BRAM)

  • 16.2 Mb of total BRAM for on-chip data storage
  • Usable as 36 Kb true dual-port or 72 Kb simple dual-port blocks

Digital Signal Processing (DSP) Slices

  • 240 DSP slices with 25 × 18 multipliers for high-speed arithmetic

Clock Management Tiles (CMTs)

  • 8 Clock Management Tiles (CMTs) consisting of MMCMs and PLLs for clock synthesis

Input/Output Blocks (IOBs)

  • Programmable high-performance SelectIOTM interface blocks
  • Support common I/O standards like LVCMOS, LVDS


  • Integrated multi-gigabit transceivers with data rates up to 12.5 Gbps

This combination enables implementing wide range of complex digital interfaces, processing and control systems using the Artix-7 family architecture.

XC7A100T-2FGG676i Features and Specifications

The key features and resources available in the XC7A100T-2FGG676i FPGA variant are:

Logic Cells

  • 115,200 CLB slices
  • 460,800 LUTs, 921,600 Flip-flops

DSP Slices

  • 240 DSP48E1 slices

Block RAM

  • 16.2 Mb distributed RAM
  • 216 x 36 Kb blocks


  • 6 x 12.5 Gbps transceiver channels

Maximum User I/O

  • 413 I/O pins

Clock Management

  • 8 MMCM, 12 PLL blocks

PCI Express

  • Single PCIe Gen2 x1 lane endpoint

This combination makes the XC7A100T suitable for applications like wireless communications, medical imaging needing moderate programmable logic performance along with high-speed serial connectivity.

XC7A100T Design Considerations

Some key considerations when working with the XC7A100T-2FGG676i FPGA include:

Tool Flow – Xilinx Vivado tools for synthesis and implementation

Simulation – Vivado simulator, ModelSim for verifying functionality

IP Integration – Xilinx IP catalog provides various interface, processing cores

Pin Planning – Mapping system interfaces and I/O to FPGA during design entry

Clocking – Leveraging MMCMs and PLLs for synthesis and jitter control

Transceiver Design – Following Xilinx transceiver wizard and routing guidelines

Team Experience – Prior expertise with Artix-7 architecture recommended

Taking these factors into account early in the design cycle enables fully harnessing the powerful capabilities of the XC7A100T FPGA.

XC7A100T Target Applications

The Artix-7 based XC7A100T FPGA is suitable for a wide range of applications including:

  • Wireless communications – Radio and baseband processing, wireless microcells
  • Aerospace and defense – Navigation systems, avionics, image processing
  • Test and measurement – High-speed control and analysis
  • Medical – Ultrasound, tomography, DNA sequencing systems
  • Video broadcasting – Encoder/decoder systems
  • Wireline access – Ethernet switches, programmable networking
  • Automotive – Advanced driver assistance systems, infotainment
  • Industrial – Process control systems, instrumentation
  • High performance computing – Hardware acceleration, algorithm offload

The transceivers, DSP blocks and abundant programmable logic enable implementing processing intensive and high-speed interfacing systems optimized for these domains.

XC7A100T vs Other Xilinx FPGAs

XC7A100T vs Artix-7 35T

  • 35T FPGA has about 70% of the programmable logic resources
  • Reduced transceiver channels and smaller form-factor 256 pin package

XC7A100T vs Kintex-7 100T

  • Kintex-7 100T has similar capacity but higher performance minutes
  • Adds memory, PCIe Gen 3, QSFP interface capabilities

XC7A100T vs Spartan-7 100

  • Spartan-7 100 has 40% less capacity than Artix-7 100T
  • Maximum speed grade of -2, no transceivers

XC7A100T vs Zynq-7000

  • Zynq combines FPGA programmable logic with dual-core ARM CPU
  • Well suited for processor acceleration vs pure FPGA applications

The XC7A100T offers compelling programmable logic capacity and high-speed transceivers for the Artix-7 mid-range class.


Xilinx FPGA distributor
Xilinx FPGA distributor

The Xilinx XC7A100T-2FGG676i FPGA packs 460K logic cells, 240 DSP slices and 6 integrated 12.5G transceivers that make it suitable for communication systems, image processing, test equipment and other applications demanding reasonably high logic capacity and serial connectivity. The availability of a rich set of IP, software tools and documentation enables rapid development leveraging the Artix-7 family. Engineers can fully utilize the potential of this FPGA for creating high-performance systems by following design guidelines outlined for Artix-7 devices.

What is Xilinx XC7A100T-2FGG676i FPGA? – FQA

Q1. What applications is the Xilinx XC7A100T FPGA well suited for?

The XC7A100T with 460K logic cells, 240 DSP Blocks and high-speed transceivers fits well for wireless, aerospace, medical imaging, video broadcasting and test applications.

Q2. What FPGA family does the XC7A100T device belong to?

The XC7A100T is a member of the mid-range Artix-7 family of FPGAs featuring optimized programmable logic fabric and high-speed serial connectivity.

Q3. How does the XC7A100T resource capacity compare with higher-end Kintex-7 FPGAs?

The XC7A100T has similar programmable logic capacity as Kintex-7 but lower performance, less memory, and lacks PCIe Gen 3 and QSFP blocks featured in high-end Kintex-7.

Q4. What are some key components in the XC7A100T FPGA architecture?

Major components are the 460K 6-input LUT logic cells, 16 Mb BRAM blocks, 240 DSP48E1 slices, integrated 12.5G transceivers and high-range SelectIO interface blocks.

Q5. What expertise is recommended for designing with the XC7A100T FPGA?

Prior experience with Xilinx tools and Artix-7 architecture is beneficial. Simulation, pin planning, transceiver and clocking design skills are key for harnessing XC7A100T effectively.

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