Simple programmable logic device: Difference between revisions

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There are several manufacturers with many different families of PLD devices, so there are many variations in architecture. The two major types of programmable logic devices are field programmable gate arrays (FPGAs) and complex programmable logic devices (CPLDs). The distinction between the two is often a little fuzzy, with manufacturers designing new, improved architectures, and frequently muddying the waters for marketing purposes. Together, CPLDs and FPGAs are often referred to as High-Capacity Programmable Logic Devices (HCPLDs).

Simple Programmable Logic Devices (SPLD) informationTheThe programming technologies for PLD devices are actually based on the various types of semiconductor memory. As new types of memories have been developed, the same technology has been applied to the creation of new types of PLD devices. The amount of logic resources available is the major distinguishing feature between SPLDs and HCPLDs.

Today, SPLDs are devices that typically contain the equivalent of 600 or fewer gates, while HCPLDs have thousands and hundreds of thousands of gates available. Of the two types of HCPLD devices, FPGAs offer the highest amount of logic density, the most features, and the highest performance.