ALPS PROGRAMMABLE- LOGIC DIRECTORY

摘要

Programmable-logic devices are the fastest growing seg- ment of the logic-device family for two fundamental rea- sons. Their ever- increasing gate count per device gathers up functions that you might otherwise spread over a number of discrete-logic and memory chips. This approach improves end-system size, power consumption, performance, reliability, and cost. Equally important, you can in seconds or minutes configure and, in many cases, reconfigure these devices at your workstation or in the system-assembly line. This capability provides powerful flexibility to react to last-minute design changes, to prototype ideas before implementation, and to meet time-to-market deadlines that both customer needs and competitive pressures dictate. The term "logic devices" subdivides into discrete logic, simple PLDs and complex PLDs; FPGAs; and gate-array, structured, standard-cell, and custom-cell ASICs. FPGAs, SPLDs and PALs, and CPLDs are all programmable-logic devices, although their internal-architecture implementations differ. This article uses the term "programmable-logic device" to refer to the entire range of products and specifies a category via its abbreviation.