
( Brand: Digilent ), ( Manufacturer Part Number: 67084530-590E ), ( Part Type: Digital Board ), ( Binding: Paperback ), ( Language: English ), ( Pages: 351 ), ( Edition: 2nd ), ( Author: Richard E. Haskell, Darrin M. Hanna ), ( UPC: 780980133776 )
The **Digilent 67084530-590E Spartan-6 Starter Board** is a versatile and powerful platform designed for educators, engineers, and enthusiasts exploring the world of digital design, field-programmable gate arrays (FPGAs), and hardware acceleration. Built around the **Xilinx Spartan-6 XC6SLX16 FPGA**, this board offers a robust foundation for prototyping, learning, and developing custom logic circuits, digital signal processing (DSP) applications, and embedded systems. The Spartan-6 family, known for its balance of performance and affordability, provides up to 16,000 logic cells, 120 DSP slices, and 1.2 Mb of block RAM, making it ideal for projects ranging from simple combinational logic to complex state machines, finite state machines (FSMs), and even early-stage FPGA-based SoC (System on Chip) experiments. The board s compact yet feature-rich design includes a **100-pin expansion connector**, which supports a wide array of peripheral interfaces, including **RS-232 serial communication**, **I C**, **SPI**, and **GPIO**, allowing seamless integration with sensors, actuators, and other microcontrollers like Arduino or Raspberry Pi. For debugging and verification, the board is equipped with **four 8-bit LEDs**, **two 7-segment displays**, **two push buttons**, and **two 10-bit potentiometers**, providing immediate visual feedback for testing and prototyping. Additionally, the **JTAG port** enables direct communication with Xilinx s **ISE Design Suite** or **Vivado**, while the **active-HDL compatible** nature of the board ensures seamless integration with Mentor Graphics popular FPGA development environment, offering users a flexible workflow for synthesis, simulation, and bitstream generation. Whether you're teaching digital logic fundamentals, experimenting with Verilog or VHDL code, or developing real-time control systems, the 67084530-590E serves as an excellent entry point into FPGA development, bridging the gap between theory and hands-on implementation. Its modular design and extensive documentation make it a staple in academic labs, maker workshops, and professional R&D environments where innovation meets practicality.
### **Pros and Cons of buying a Digilent Basys 3 FPGA Board (Model 67084530-590E) for Verilog/Active-HDL Development**
#### **Pros**
1. **Beginner-Friendly Learning Platform**
The Basys 3 is widely regarded as an excellent entry-level FPGA board for students and hobbyists. It includes a variety of on-board peripherals (LEDs, switches, seven-segment displays, VGA output, and audio jack) that simplify prototyping and help users quickly verify designs without needing external components.
2. **Xilinx Spartan-6 FPGA (XC6SLX45)**
The board features a Spartan-6 FPGA, which is a cost-effective yet powerful device for learning digital design. It supports Verilog/VHDL and is compatible with Xilinx ISE (now Vivado) and third-party tools like Active-HDL. The FPGA s resources (45K logic cells, 120Kb block RAM) are sufficient for educational projects and small-scale applications.
3. **Pre-Built Development Environment**
Digilent provides a user-friendly development environment with pre-loaded firmware (e.g., the "Hello World" demo) and documentation. The board s USB connection allows easy programming via Xilinx tools or Active-HDL, reducing setup complexity.
4. **Affordable Cost**
Compared to other FPGA boards with similar features (e.g., DE10-Lite, Nexys 4), the Basys 3 is reasonably priced, making it accessible for students or individuals on a budget. The cost is justified by its educational value and included peripherals.
5. **Active-HDL Compatibility**
Active-HDL is a robust simulation and synthesis tool for Verilog, and the Basys 3 works seamlessly with it. The tool supports simulation, synthesis, and bitstream generation, allowing users to test designs before downloading them to the FPGA. Active-HDL s user-friendly interface is particularly useful for beginners.
6. **Community and Documentation Support**
The Basys 3 has a large user community, with extensive tutorials, forums (e.g., Digilent s resources, Stack Exchange, Reddit), and third-party guides available. This makes troubleshooting and learning easier compared to less popular boards.
7. **Versatile Peripherals**
The board includes:- **7-segment displays** (for digital output).
- **Push buttons and switches** (for user input).
- **VGA output** (for simple graphics or video processing).
- **Audio jack** (for sound generation).
- **USB UART** (for serial communication).
These peripherals enable a wide range of projects, from simple counters to basic multimedia applications.
8. **Modular and Extendable**
The board supports expansion via the **Pmod connectors**, allowing users to add sensors, displays, or other modules (e.g., Pmod CLUE, Pmod LED7). This flexibility encourages experimentation beyond basic FPGA learning.
9. **No Need for Additional Hardware**
Unlike some FPGA boards that require external power supplies or complex setups, the Basys 3 is self-contained and plug-and-play. It can be powered directly via USB or an external power supply.
10. **Long-Term Availability**
Digilent has maintained support for the Basys 3 for years, and while newer models (e.g., Basys 3 Artix-7) exist, the Spartan-6 version remains widely available. This ensures continuity for projects or educational purposes.
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#### **Cons**
1. **Outdated FPGA Architecture**
The Spartan-6 FPGA is now several generations old (released in 2008), and while it is still capable for learning, it lacks modern features like:- **Hardware acceleration** (e.g., DSP slices are limited compared to newer FPGAs).
- **Advanced I/O standards** (e.g., no PCIe, no high-speed serial transceivers).
- **Support for newer synthesis tools** (e.g., Vivado s advanced features are optimized for newer FPGAs like Artix-7 or Zynq).
This may limit advanced projects or real-world applications requiring cutting-edge features.
2. **Limited Resources for Complex Designs**
While the XC6SLX45 is sufficient for educational projects, it may struggle with larger designs requiring significant logic, memory, or high-speed I/O. Users planning to develop complex systems (e.g., embedded processors, high-speed communication) may outgrow the board quickly.
3. **No On-Chip Processor (No Soft Core)**
The Spartan-6 lacks a built-in soft processor core (e.g., MicroBlaze), which is useful for embedded systems programming. While Verilog can simulate a simple processor, integrating a full soft core would require additional effort or external components.
4. **Active-HDL Licensing Costs**
While Active-HDL is a powerful tool, it is not free. The full version requires a paid license, which may be a barrier for casual users or students on tight budgets. Free alternatives like **GHDL (for VHDL) or OpenCores** exist, but they may lack some features of Active-HDL.
5. **No Built-in Oscilloscope or Debugging Tools**
Unlike some higher-end FPGA boards (e.g., DE10-Lite with integrated oscilloscopes), the Basys 3 lacks built-in debugging hardware. Users must rely on external tools (e.g., logic analyzers, multimeter) or software-based debugging (e.g., ChipScope for Spartan-6, though limited).
6. **VGA Output Limitations**
The VGA output is basic and supports only standard resolutions (e.g., 640x480). For advanced graphics or high-resolution displays, additional circuitry or a newer FPGA board would be required.
7. **No Wi-Fi or Ethernet MAC**
The board lacks built-in Ethernet or Wi-Fi support, which can be a limitation for projects requiring network connectivity. Adding these features would require external PHY chips or additional development.
8. **Potential for Wear and Tear**
As a consumer-grade educational board, the Basys 3 may not be as rugged as industrial FPGA modules. Frequent soldering or handling could lead to component damage over time.
9. **Limited Expansion Beyond Pmod**
While Pmod connectors are useful, they are proprietary and may not be as flexible as other expansion buses (e.g., Arduino headers or PCIe slots). Some users may find the ecosystem less open than alternatives.
10. **Deprecation in Favor of Newer Models**
Digilent has since released newer boards (e.g., Basys 3 Artix-7, Nexys Video), which offer more modern FPGAs (e.g., Artix-7 with hard processors) and better peripherals. While the Spartan-6 version is still viable, it may not be the best choice for long-term professional use.
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### **Conclusion**
The **Digilent Basys 3 (Spartan-6) FPGA board** is an excellent choice for **beginners, students, or hobbyists** learning Verilog and digital design with Active-HDL. Its strengths lie in its **affordability, ease of use, and comprehensive on-board peripherals**, which make it ideal for educational projects, small-scale prototyping, and hands-on learning. The board s compatibility with Active-HDL and its well-documented community further enhance its appeal.
However, for **advanced users, professional development, or projects requiring modern FPGA features** (e.g., high-speed I/O, embedded processors, or complex system integration), the Basys 3 s **outdated architecture and limited resources** may become a drawback. In such cases, a newer board (e.g., Basys 3 Artix-7, DE10-Lite, or Nexys Video) would be more suitable.
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### **Recommendation**
- **Buy the Basys 3 if:**- You are a **beginner** starting with FPGA design and need a **budget-friendly, plug-and-play** board.
- You are using **Verilog/Active-HDL** and want a simple, well-supported platform for learning.
- Your projects are **small-scale** (e.g., counters, simple logic circuits, basic I/O applications).
- You value **ease of use** and **community resources** over cutting-edge features.
- **Consider an alternative if:**- You need **modern FPGA features** (e.g., hard processors, PCIe, high-speed transceivers).
- Your projects require **complex embedded systems, networking, or high-resolution graphics**.
- You plan to **scale up** to professional or industrial applications where newer FPGAs (e.g., Artix-7, Zynq) are necessary.
- You want **better debugging tools** (e.g., integrated oscilloscopes, JTAG support).
#### **Alternatives to Consider:**1. **Digilent Basys 3 Artix-7 (67084530-590F)** Upgraded version with a **XC7A35T FPGA** (hard processors, better I/O).
2. **DE10-Lite (Intel Cyclone V)** More advanced FPGA with **Ethernet, USB, and better debugging**.
3. **Nexys Video (Xilinx Artix-7)** Includes **VGA, HDMI, and a hard processor**, ideal for multimedia projects.
4. **Terasic
All references to the BASYS board in this book apply newer BASYS2. The Linux synthesis tools are called from within the Alec Active-HDL integrated GUI. More recently, Digilent offers the Nexus-3 board with a Spartan-6 FPGA that costs $119. You should use Adept 2.1 to download your bit files either the BASYS2, Nexus-2, or Nexus-3 boards.
This book assumes no previous knowledge of digital design. You start at the beginning learning about basic gates, logic equations, Boolean algebra, and Kana maps.