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Что (кто) такое Programmable Array Logic - определение
Programmable Array Logic
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TYPE OF PROGRAMMABLE LOGIC DEVICE
John Birkner; Programmable array logic
Programmable Array Logic (PAL) is a family of programmable logic device semiconductors used to implement logic functions in digital circuits introduced by Monolithic Memories, Inc. (MMI) in March 1978.
Programmable Array Logic
TYPE OF PROGRAMMABLE LOGIC DEVICE
John Birkner; Programmable array logic
<hardware> (PAL) A family of fuse-programmable logic
integrated circuits originally developed by MMI.
Registered or combinatorial output functions are modelled in
a sum of products form. Each output is a sum (logical or)
of a fixed number of products (logical and) of the input
signals. This structure is well suited for automatic
generation of programming patterns by logic compilers.
PAL devices are programmed by blowing the fuses permanently
using overvoltage.
Today, more complex devices based on the same original
architecture are available (CPLD's for Complex PLD's) that
incorporate the equivalent of several original PAL chips. PAL
chips are, however, still popular due to their high speed.
Generic Array Logic devices are reprogrammable and contain
more logic gates.
(1995-12-09)
Generic Array Logic
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TYPE OF DIGITAL CIRCUIT
Programmable electrically erasable logic; Gate Array Logic; Generic array logic
<hardware, integrated circuit> (GAL) A newer kind of
Programmable Array Logic based on EEPROM storage cells,
been pioneered by Lattice. GALs can be erased and
reprogrammed and usually replace a whole set of different PALs
(hence the name).
(1995-12-09)
