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Types Of PLD (Programmabel Logic Devices)

PROM - Programmable Read Only Memory

The first PLD is PROM was introduced in 1970. PROMs was introduced for use as computer memories in which to store program instructions and constant data values.
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PLA - Programmable logic arrays

PLAs became available in 1975 to address the limitations imposed by the PROM architecture, where both planes AND and OR arrays were programmable.
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PAL - Programming Array Logic

PALs were introduced in late 1970 to address speed problem shown by PLA devices. A PAL is opposite to PROM, where AND array is programmable but OR array is fixed.
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GAL - Generic Array Logic

Generic array logic was introduced by lattice semiconductor Co. in 1983. GAL offered CMOS electrically erasable PROM (EPROM, E2PROM) variations on the PAL concept.
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EPLD - Erasable Programmable Device

EPLD devices are erasable programming devices introduced by Altera offer high density and buried registers.
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FPOA - Field Programmable Object Array

Field programmable object array was introduced by Mathstar. FPOA is a field programmable device in the form of a two-dimensional array of Silicon Objects (SOs).
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MPGA - Mask-programmable Gate Array

Mask-Programmable Gate Array (MPGA) was developed to handle larger logic circuits.
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FPAA - Field Programmable Analog Array

Field programmable analog array (FPAA) based on switched capacitor circuits operating with operational amplifiers and numerous switches incorporate many classes (subsystems) of interconnections.
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FPGA - Field Programmable Gate Array

At the beginning of 1980, there were programmable logic devices, which had fast design, highly configurable and reprogrammable, but they were support only small functions.
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Structured ASIC

There was a large gap existing between standard cell-based design and FPGA, even when FPGA was introduced to overcome the gap.
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CPLD - Complex Programmable Logic Devices

As the technology surrounding programmable devices improved, new devices were developed which combined several PLDs together on a single integrated circuit to form complex programmable logic devices,
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FPSC - Field Programmable System Chip

Lattice Semiconductor was introduced Field Programmable System Chip (FPSC), where ASIC macrocell and FPGA gates were in same silicon die.
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FPGA Central is a website bringing the FPGA (Field Programable Gate Array), CPLD , PLD, VLSI community together at one central location. Some Keywords: FGPA, FPGA, EDA Tools, FPGA Design, Central, Programmable logic, LUT, VLSI, SoC, Journal

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Types Of PLD (Programmabel Logic Devices)

PROM - Programmable Read Only Memory

PLA - Programmable logic arrays

PAL - Programming Array Logic

GAL - Generic Array Logic

EPLD - Erasable Programmable Device

FPOA - Field Programmable Object Array

MPGA - Mask-programmable Gate Array

FPAA - Field Programmable Analog Array

FPGA - Field Programmable Gate Array

Structured ASIC

CPLD - Complex Programmable Logic Devices

FPSC - Field Programmable System Chip