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Chapter 4

Designing with the Core

This chapter provides general guidelines for creating designs using the GEMAC core. To work with the example design included with the GEMAC core, see the 1-Gigabit Ethernet MAC Getting Started Guide.

General Design Guidelines

This section describes the steps required to turn a GEMAC core into a fully functioning design integrated with user-application logic. Not all implementations require all the design steps described in this chapter. The following sections discuss the design steps required for various implementations. For best results, carefully follow the logic design guidelines.

Design Steps

Generate the core from the Xilinx CORE Generator™. See Chapter 3, “Generating the

Core.”

Using the Example Design as a Starting Point

The GEMAC core is delivered through the CORE Generator with an HDL example design built around the core, allowing the functionality of the core to be demonstrated using either a simulation package or in hardware, if placed on a suitable board. Figure 4-1is a block diagram of the example design. For more information about the example design, see the 1-Gigabit Ethernet MAC Getting Started Guide.

The example design illustrates how to:

•Instantiate the core from HDL.

•Source and use the client-side interface ports of the core from application logic.

•Connect the physical-side interface of the core (GMII or RGMII) to device IOBs creating an external interface. (See Chapter 7, “Using the Physical Side Interface.”)

•Derive the clock management logic, as described in Chapter 10, “Clocking and Resetting.”

1-Gigabit Ethernet MAC v8.5 User Guide

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UG144 April 24, 2009

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Xilinx UG144 manual Designing with the Core, General Design Guidelines, Design Steps
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UG144 specifications

The Xilinx UG144, a comprehensive user guide for the versatile Zynq-7000 SoC (System on Chip) architecture, serves as an essential resource for developers and engineers designing embedded systems. Emphasizing the blend of programmable logic and processing power, this guide highlights the array of features and technologies that make the Zynq-7000 series particularly attractive for a wide range of applications.

One of the standout characteristics of the Zynq-7000 is its dual-core ARM Cortex-A9 processor, which delivers substantial performance for complex processing tasks. This soft processor enables high-speed computation, making it ideal for applications in fields such as automotive, industrial automation, and telecommunications. The guide emphasizes the ability to run multiple operating systems, including Linux and real-time operating systems, providing developers with versatile options for application design.

Additionally, the Xilinx UG144 outlines the extensive programmable logic resources integrated within the Zynq-7000 device. This FPGA fabric allows for customization and parallel processing capabilities, allowing designers to create powerful hardware accelerators tailored to specific application needs. The guide details how these programmable logic resources can easily interface with the ARM processors through a high-bandwidth AXI interface, promoting efficient data flow between the hardware and software components.

Key features highlighted in the UG144 include advanced connectivity options, including PCIe, USB, and Serial interfaces, which facilitate communication with other devices and systems. Furthermore, the guide provides insights into the supported design tools, such as the Xilinx Vivado Design Suite, which aids in both hardware and software co-design. This integrated environment significantly reduces development time while providing an efficient workflow for prototyping and testing.

In terms of performance optimizations, the guide discusses support for digital signal processing (DSP) capabilities, making the Zynq-7000 suitable for high-performance applications such as video processing and data analytics. The built-in DSP slices allow for efficient execution of complex mathematical functions, which is crucial for real-time data processing tasks.

Overall, the Xilinx UG144 guide encapsulates the versatility, performance, and flexibility of the Zynq-7000 SoC architecture. With its combination of ARM processing and programmable logic, along with robust connectivity options and development tools, it empowers engineers to create innovative solutions across a spectrum of industries, solidifying Xilinx's position as a leader in the field of embedded system design.
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