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402 www.xilinx.com Development System Reference Guide
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decimal
Decimal refers to a numbering system with a base of 10 digits starting
with zero.
decoder
A decoder is a symbol that translates n input lines of binary
information into 2n output lines. It is the opposite of an encoder.
Delay Locked Loop (DLL)
A digital circuit used to perform clock management functions on and
off-chip.
density
Density is the number of gates on a device.
design implementation
Design implementation is a design implementation specification as
opposed to the functional specification of the design. The
implementation specification refers to the actual implementation of
the design from low-level components expressed in bits. The
functional specification refers to the definition of the design or circuit
function.
device
A device is an integrated circuit or other solid-state circuit formed in
semiconducting materials during manufacturing.
digital
Digital refers to the representation of information by code of discrete
elements, as opposed to the continuous scale of analog representation.
DONE pin
The DONE pin is a dual-function pin. As an input, it can be configured
to delay the global logic initialization or the enabling of outputs. As an
output, it indicates the completion of the configuration process.
downloading
Downloading is the process of configuring or programming a device
by sending bitstream data to the device.
DRC
The Design Rule Checker (DRC). A program that checks the (NCD)
file for design implementations for errors.
DSP
Digital Signal Processing (DSP). A powerful and flexible technique of
processing analog (linear) signals in digital form used in CoreGen.