Block. The CLB
constitutes the basic FPGA cell. The FPGA is an array of CLBs organized
in columns and rows on the silicon die. CLBs are used to implement macros
and other designed functions. They provide the physical support for an
implemented and downloaded design. They have inputs on each side, and
this versatility makes them flexible for the mapping and partitioning
CPLDs are a class of programmable
logic devices. They feature the speed, design simplicity, and predictability
of PALs. Conceptually, they consist of PAL-like function blocks that can
be interconnected through a switch matrix.
Dynamic Host Configuration Protocol.
Dynamic Host Configuration Protocol allows the dynamic leasing
of IP addresses to those computers configured as DHCP clients. By using DHCP,
you are freed from the burden of manually assigning IP addresses to
most of your workstations.
FPGAs are a class of programmable
logic devices. They feature a gate-array-like architecture with a matrix
of logic cells surrounded by a periphery of I/O cells.
Block. An IOB
is a collection or grouping of basic elements that implement the input
and output functions of FPGA and CPLD devices.
phase alternation by
A television signal standard (625 lines, 50 Hz, 220 V primary power)
used in the United Kingdom, much of the rest of western Europe,
several South American
countries, some Middle East and Asian countries, several African
countries, Australia, New Zealand, and other Pacific island
Programmable Array Logic.
A PLD in which the OR array is fixed (pre-defined),
but the AND array is programmable.
PAL chips use fuse-programmable logic
(i. e., overvoltage is applied to portions of the chip to
physically blow a circuit open).
Programmable Logic Device.
A programmed integrated circuit. The group of devices known as PLDs
include PROMs, Programmable Logic Arrays (PLA), and Programmable Array
Logic/Generic Array Logic (PAL/GAL).
VHDL is an acronym for VHSIC Hardware
VHSIC is an acronym for Very High-Speed
VHDL can be used to model a digital system at many levels of abstraction
ranging from the algorithmic level to the gate level.