VLSI design of a custom ASIC using VHDL for converting 12-bit binary to BCD

Abstract

Very large scale integration (VLSI) and hardware description languages, such as VHDL, are rapidly becoming an integral part of the tools used for advanced digital design. VLSI can reduce numerous TTL parts and hundreds of connecting wives to a single chip saving valuable space while increasing reliability. Hardware description languages allow complex circuits to be described as a function of circuit behavior and structure. Advances in synthesis tools and standard cell libraries make it possible to create custom application specific integrated circuits (ASICs) from the behavioral and structural descriptions of digital circuits. The paper presents a VLSI design of a custom ASIC to convert 12-bit binary values to BCD format using the hardwave description language VHDL. Included are the design steps and methodology necessary to synthesize a VHDL model for fabrication through MOSIS. >