Introduction to XILINX XCF04SVOG20C

The XILINX XCF04SVOG20C is a configuration PROM (Programmable Read-Only Memory) device that is used for storing and loading configuration data into Xilinx FPGAs (Field Programmable Gate Arrays). It is part of the XCF series of configuration PROMs from Xilinx, which are designed to provide a reliable and efficient means of configuring FPGAs.

Key Features of XCF04SVOG20C

• 4 Mb (512 KB) capacity
• 3.3V or 2.5V operation
• Single-bit serial configuration mode
• In-system programmability
• Industry-standard JTAG interface for programming and debugging
• Small form factor: 20-pin TSSOP package
• Extended temperature range: -40°C to +125°C

Understanding Configuration PROMs

Configuration PROMs are non-volatile memory devices that store the configuration data required to initialize an FPGA upon power-up or reset. They provide a permanent storage solution for the FPGA’s configuration, eliminating the need for external configuration devices or processors.

How Configuration PROMs Work

1. The configuration data is first programmed into the PROM using a device programmer or through the JTAG interface.
2. Upon power-up or reset, the FPGA automatically loads the configuration data from the PROM.
3. The FPGA is configured with the loaded data and becomes operational.

Advantages of Using Configuration PROMs

• Simplifies the FPGA configuration process
• Reduces system complexity and cost
• Provides a reliable and permanent storage solution
• Supports in-system updates and reprogramming

XCF Series Configuration PROMs

Xilinx offers a range of configuration PROMs under the XCF series, catering to different capacity and performance requirements. The XCF series is designed to work seamlessly with Xilinx FPGAs, providing an efficient and reliable configuration solution.

XCF Series Lineup

Device	Capacity	Voltage	Package Options
XCF01SVOG20C	1 Mb	3.3V/2.5V	20-pin TSSOP
XCF02SVOG20C	2 Mb	3.3V/2.5V	20-pin TSSOP
XCF04SVOG20C	4 Mb	3.3V/2.5V	20-pin TSSOP
XCF08PVOG48C	8 Mb	3.3V/2.5V	48-pin TSSOP, 48-pin VQG
XCF16PVOG48C	16 Mb	3.3V/2.5V	48-pin TSSOP, 48-pin VQG
XCF32PVOG48C	32 Mb	3.3V/2.5V	48-pin TSSOP, 48-pin VQG

Compatibility with Xilinx FPGAs

The XCF series configuration PROMs are compatible with a wide range of Xilinx FPGAs, including:

• Spartan-3, Spartan-3E, and Spartan-3A
• Virtex-4 and Virtex-5
• Kintex-7 and Virtex-7
• Artix-7

Programming the XCF04SVOG20C

Programming the XCF04SVOG20C involves loading the configuration data into the PROM using a device programmer or through the JTAG interface. There are several methods and tools available for programming the PROM.

Programming Methods

1. Parallel programming using a device programmer
2. Requires a compatible device programmer
3. Faster programming times

4. Suitable for production and high-volume programming

5. Serial programming using the JTAG interface

6. Uses the industry-standard JTAG interface
7. Allows in-system programming and debugging
8. Slower programming times compared to parallel programming
9. Suitable for development and low-volume programming

Programming Tools

• Xilinx iMPACT software
• Supports both parallel and serial programming
• Integrated with the Xilinx ISE Design Suite

• Provides a user-friendly interface for programming and debugging

• Third-party device programmers

• Standalone hardware programmers
• Support parallel programming
• Offer high-speed programming capabilities

Programming Procedure

1. Connect the XCF04SVOG20C to the device programmer or JTAG interface.
2. Launch the programming software (e.g., Xilinx iMPACT).
3. Load the configuration data file (typically in .bit or .mcs format).
4. Configure the programming settings (voltage, programming mode, etc.).
5. Initiate the programming process.
6. Verify the programmed data for accuracy.

Connecting XCF04SVOG20C to an FPGA

To use the XCF04SVOG20C for configuring an FPGA, it must be properly connected to the FPGA’s configuration pins. The connection depends on the specific FPGA and the desired configuration mode.

Connection Diagram

Here’s a typical connection diagram for using the XCF04SVOG20C with a Xilinx FPGA:

    XCF04SVOG20C               FPGA
    ------------               ----
    VCC  --------->            VCC
    GND  --------->            GND
    CEO  --------->            CEO
    CLK  --------->            CLK
    OE   --------->            OE
    DIN  <---------            DOUT
    RESET -------->            PROG

Configuration Modes

The XCF04SVOG20C supports several configuration modes, including:

• Master Serial Mode
• FPGA generates the configuration clock

• Suitable for a single FPGA configuration

• Slave Serial Mode

• External clock source is used

• Allows multiple FPGAs to be configured from a single PROM

• JTAG Mode

• Uses the JTAG interface for configuration and debugging
• Provides access to advanced features and functionality

Configuration Sequence

1. Upon power-up or reset, the FPGA asserts the RESET signal to the PROM.
2. The PROM starts sending the configuration data to the FPGA.
3. The FPGA receives the configuration data and loads it into its configuration memory.
4. Once the configuration is complete, the FPGA becomes operational.

Applications of XCF04SVOG20C

The XCF04SVOG20C configuration PROM finds applications in various industries and systems where Xilinx FPGAs are used. Some common applications include:

• Automotive electronics
• Industrial automation and control systems
• Medical devices
• Consumer electronics
• Aerospace and defense systems
• Telecommunications equipment

Benefits in System Design

Using the XCF04SVOG20C in system design offers several benefits:

• Simplifies the FPGA configuration process
• Reduces system complexity and cost
• Provides a reliable and permanent storage solution for configuration data
• Enables in-system updates and reprogramming
• Offers a small form factor and low power consumption

FAQ

1. Q: What is the storage capacity of the XCF04SVOG20C?
   A: The XCF04SVOG20C has a storage capacity of 4 Mb (512 KB).

2. Q: What is the operating voltage range of the XCF04SVOG20C?
   A: The XCF04SVOG20C can operate at either 3.3V or 2.5V.

3. Q: Can the XCF04SVOG20C be programmed in-system?
   A: Yes, the XCF04SVOG20C supports in-system programming through the JTAG interface.

4. Q: What is the package type of the XCF04SVOG20C?
   A: The XCF04SVOG20C comes in a 20-pin TSSOP (Thin Shrink Small Outline Package) package.

5. Q: Is the XCF04SVOG20C compatible with all Xilinx FPGAs?
   A: The XCF04SVOG20C is compatible with a wide range of Xilinx FPGAs, including Spartan, Virtex, Kintex, and Artix series devices. However, it’s always recommended to consult the specific FPGA’s documentation for compatibility information.

Conclusion

The XILINX XCF04SVOG20C is a versatile and reliable configuration PROM that simplifies the FPGA configuration process. With its 4 Mb capacity, support for various configuration modes, and in-system programmability, it offers a comprehensive solution for storing and loading configuration data into Xilinx FPGAs.

By using the XCF04SVOG20C, designers can streamline their system design, reduce complexity, and ensure a robust and efficient FPGA configuration process. Its compatibility with a wide range of Xilinx FPGAs and the availability of programming tools and methods make it a popular choice for various applications across different industries.

As Xilinx continues to innovate and release new FPGA devices, the XCF series configuration PROMs, including the XCF04SVOG20C, will remain an essential component in the FPGA ecosystem, enabling designers to harness the full potential of these powerful programmable devices.