Xilinx Blocks

Block Parameters Dialog Box

The block parameters dialog box can be invoked by double-clicking the icon in your Simulink model.

Figure 3-12: Down sample block parameters dialog box

Parameters specific to the block are:

∙Sampling Rate: must be an integer greater or equal to 2. This is the ratio of the output sample period to the input, and is essentially a sample rate divider. For example, a ratio of 2 indicates a 2:1 division of the input sample rate. If a non- integer ratio is desired, the Up Sample block can be used in combination with the Down Sample block.

∙Zero Initial Output (otherwise NaN): NaN means Not a Number. This option lets you choose what the first value of the new sample (before it has valid data) will be. By selecting Zero Initial Output, you can validate the first sample with valid data of zero. Otherwise, an invalid data (NaN) will be the block’s first output.

Other parameters used by this block are explained in the Common Parameters section of the previous chapter.

The Down Sample block does not use a Xilinx LogiCORE.

Get Valid Bit

The Xilinx Get Valid Bit element sets its output to 1 when its input is a valid data value. The output is set to 0 otherwise.

In the Xilinx Blockset, every data sample that flows through the model is accompanied by a handshake validation signal. In the corresponding hardware, every data-carrying bus has a companion net that carries a

status indicator. Under different circumstances the status indicator may be set to invalid. For example, a pipeline might not yet have filled, or outputs might be bursty, as with an FFT. This block simply reports the valid status of the samples presented to it.

There are no parameters for this block.

Basic Elements

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Xilinx V2.1 manual Get Valid Bit, Down sample block parameters dialog box
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V2.1 specifications

Xilinx V2.1 is a notable iteration in the series of versatile and robust Field-Programmable Gate Arrays (FPGAs) developed to cater to a wide range of applications. Launched to provide enhancements in performance and flexibility, V2.1 embodies sophisticated technologies and features that stand out in the electronics industry.

One of the primary features of Xilinx V2.1 is its improved processing power. The architecture has been optimized to support higher clock speeds and increased logic density, allowing for more complex designs to be implemented effectively. This boost in performance is facilitated by utilizing advanced silicon technologies, which significantly reduce power consumption while maximizing efficiency.

Another significant characteristic of Xilinx V2.1 is its enhanced I/O (Input/Output) capabilities. The device supports a variety of industry-standard interfaces, which include PCI Express, SATA, and various serial communication protocols. Such adaptability ensures seamless integration into existing systems, providing engineers with the flexibility to adapt to various application requirements without the need for substantial redesign efforts.

Xilinx V2.1 also features improved scalability, making it a prime choice for applications that demand diverse performance levels. This device supports an array of configurations and can be used in small-scale projects as well as in larger, more demanding environments requiring extensive resources. This scalability is further aided by support for multiple development platforms, enabling rapid prototyping and simplifying the design process.

Security is increasingly becoming a priority in digital design, and Xilinx V2.1 addresses this concern via hardware security features. It includes enhanced encryption protocols and secure boot functionalities, which help protect intellectual property and sensitive data from unauthorized access.

Additionally, the integration of advanced DSP (Digital Signal Processing) blocks allows Xilinx V2.1 to efficiently handle data-intensive tasks such as video processing and real-time signal analysis. These capabilities make it suitable for applications in telecommunications, automotive systems, and industrial automation.

Xilinx V2.1 also benefits from a rich development environment, including robust software tools that facilitate design entry, simulation, and verification. The support for industry-standard programming languages like VHDL and Verilog simplifies the development process, enabling engineers to design complex systems more efficiently.

In summary, Xilinx V2.1 stands out due to its impressive combination of high performance, flexibility, scalability, security, and comprehensive development support. These features make it a valuable asset for engineers and developers looking to innovate across various sectors, from telecommunications and automotive to industrial applications.
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