FPGA Design Guide A catalog of device tools and flows

The separate components represent the FPGA's power supply and power connection to ground, such as the decoupling capacitor between the low and the low. The figure on the right is the block diagram of the FPGA, which is actually the pin diagram. The schematic diagram only represents the electrical connections, as long as the position of each pin is as described in the data sheet.

There is generally a reference design for the connection between the power supply and the ground.

FPGA (Field Programmable Gate Array) is a product of further development on the basis of programmable devices such as PAL, GAL, and CPLD. It appears as a semi-customized circuit in the field of application-specific integrated circuits (ASIC), which not only solves the shortcomings of custom circuits, but also overcomes the shortcomings of the limited number of gates of the original programmable devices. The uses of FPGAs are as follows:

Circuit design: connection logic and control logic are the areas where FPGA plays a relatively large role in the early stage, and it is also the cornerstone of FPGA applications, which is also an important role of FPGA.

System-level application: The system-level application is the combination of FPGA and traditional computer technology to realize an FPGA version of the computer system, such as using Xilinx V-4, V-5 series FPGA, to achieve embedded Power PC CPU, and then cooperate with various peripheral functions to achieve a basic environment, on this platform to run Linux and other systems. The system also supports a variety of standard peripherals and functional interfaces (e.g., image interfaces), which is very helpful for quickly building FPGAs into large systems.

CLIVE "MAX" Maxfield is a well-known expert in the world's semiconductor design industry, and the editor-in-chief of the FPGA professional programmable logic designline. Mr. Maxfield has extensive experience in circuit design and development, and is known worldwide for his outstanding writing skills. He has written columns for leading magazines such as EDN and EE Design for a long time, and has written several best-selling books on electronic technology.

1.Circuit function design.

Before the system design, the first thing to do is to prepare for the solution demonstration, system design, and FPGA chip selection. According to the task requirements, such as the indicators and complexity of the system, the system engineer weighs the working speed and various resources and costs of the chip itself, and selects a reasonable design scheme and appropriate device type. A top-down design approach is typically adopted, where the system is divided into several basic units, and then each basic unit is divided into the next level of basic units, and this is done until the EDA library can be used directly.

2.Design inputs.

Design input gripping is the process of representing a designed system or circuit in some form required by the development software and entering it into an EDA tool. Common methods include Hardware Description Language or Unique (HDL) and schematic input methods. The schematic input method is the most direct way to describe it, and it is widely used in the early days of the programmable chip development section, which calls up the required components from the component library and draws the schematic.