Recent Trends In VLSI Design Applications

Digital System Design:

                             The digital system design is nothing but the embedded systems, which forms a part or many parts in a simple or complex system. The program can be a high level like C or C++ or any hardware language (HDL) like VHDL/or Verilog. However, the complexity of high level language restrains the use by many of designers; rather they prefer to use HDL languages. Hence, it is felt that the use of VHDL helps in the verification process in various stages to ensure the correctness of the stages before entering to the next.

A model of a digital circuit is an abstract by a modeling language. Such a language is preferred here to VHDL/ Verilog. However, the object oriented language like C++ has an extension to it, called System C, to be one such language, which could be used for this purpose too.

 Software Augmentation:  

                              Although many authors has spelt out various design methods, however, the recent methodology is the process of augmentation of the application software into the hardware (application circuit/device) itself. The application software developed for any application devices is programmed & stored in a memory (slave Device) though the FPGA (target device) on any Software Plat form like Xilinx. The FPGA has been embedded into a Spartan6 Xilinx Platform. The memory could be an on board SRAM, or any external SRAM, and the display device could be a LCD/or SSD/or LEDs. This could be done as described below: The very initial step is to perform the study of requirements and done the analysis for both hardware and software essentialities & constraints. Then the hardware & software constraints are resolved. Once the constrains are removed, the hardware design is performed, in a concurrent mode. Then the software is made ready. The paper discussed here, has been chosen for the FPGA on Spartan6 Xilinx platform. The HDL used here is VHDL. The application software is programmed suitably. Last but not the least, is the augmentation of software into the application devices. Our co-authors have already selected various sensors for their applications. Accordingly, the program has been verified through the built in ISim software tools for the proper timing and correctness of the design. This paper is a collective effort of our engineers for their projects, in realization of Modeling, Simulation & Implementation of various communication protocols in our projects using VHDL language and using appropriate hard -wares as required & at KCTRONICS Innovative Services Private Limited, Bangalore.

Language (VHDL): 

The language, VHDL has been divided into two constructs such as Entity (ii) architecture. The entity is a pre defined word and the architecture is a relationship between input & outputs of the systems bound to the entity. This binding helps in the visibility of the entity to the architecture. The system can be designed with the use of VHDL language on the Xilinx platform, FPGA being as the target device where the application program can be stored for the purpose of application devices.

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