Hardware Implementation

• The final step in design is to “download” the functionality into the actual hardware i.e. the target device.

• The synthesis tool generates the output in terms of “bit-stream” that is used to configure the target device.

• Vendor specific tools can be used for downloading the bit-stream into the physical device.

HDL

• A hardware description language (HDL) is a software coding language used to model the intended operation of a piece of hardware.

• There are two aspects to the description of hardware that an HDL facilitates:
– true abstract behaviour modeling.
– hardware structure modeling.

• Abstract behaviour modeling
– A hardware description language is declarative in order to facilitate the abstract description of hardware behaviour for specification purpose. This behaviour is not influenced by structural or design aspects of the hardware intent.


• Hardware structure modeling
– Hardware structure is capable of being modeled in a hardware description language irrespective of the design’s behaviour.

VHDL

• What is VHDL?
– Digital system design using Hardware Description Language is an established methodology in EDA(ELECTRONIC DESIGN AUTOMATION).
– VHDL stands for
“VERY HIGH SPEED INTEGRATED CIRCUITS HARDWARE DESCRIPTION LANUAGE”


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