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Questions and Answers
What is the purpose of Hardware Description Languages (HDLs)?
What is the purpose of Hardware Description Languages (HDLs)?
What is the role of Programmable Logic Devices (PLDs) in HDL programming?
What is the role of Programmable Logic Devices (PLDs) in HDL programming?
How do HDLs differ from high-level programming languages like C or Python?
How do HDLs differ from high-level programming languages like C or Python?
What is the function of an FPGA in HDL programming?
What is the function of an FPGA in HDL programming?
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In HDL code, how are different portions of digital hardware able to operate?
In HDL code, how are different portions of digital hardware able to operate?
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What does an Input/Output Block (IOB) represent in HDL programming?
What does an Input/Output Block (IOB) represent in HDL programming?
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Which part of an FPGA is responsible for programmable gates?
Which part of an FPGA is responsible for programmable gates?
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'Behavioral' in HDL programming typically refers to:
'Behavioral' in HDL programming typically refers to:
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'entity' in HDL code represents:
'entity' in HDL code represents:
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Study Notes
Hardware Description Language (HDL)
- A set of notations used for modeling the logical function of digital circuits and systems
- Similar to software programming languages, used to describe a circuit using words and symbols
- Allows for development of software that can convert textual description into configuration data loaded into Programmable Logic Devices (PLDs)
Programmable Logic Devices (PLDs)
- Examples include FPGAs and others
- Field-programmable gate array (FPGA) is an integrated circuit designed to be configured as "field-programmable" by a customer or a designer after manufacturing
- Consists of:
- IOB – Input/Output Block (Programmable pins)
- CLB – Configuration Logic Block (Programmable Gates)
HDL Code Characteristics
- Resembles high-level programming languages such as C or Python
- Statements in HDL code involve parallel operation, whereas programming languages represent sequential operation
- Describes digital hardware, and separate portions of this hardware can operate simultaneously
- Written using a top-to-bottom organization, but executes in parallel
Example of HDL Code
- Entity declaration:
entity Circuit_1 is - Port declaration:
Port ( a : in STD_LOGIC; b : in STD_LOGIC; out1 : out STD_LOGIC); - Architecture declaration:
architecture Behavioral of Circuit_1 is - Begin statement:
begin out1
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Description
Test your knowledge on Hardware Description Language (HDL) programming used for modeling digital circuits. Learn about using HDLs to describe circuits and convert them into configuration data for Programmable Logic Devices (PLDs) like FPGAs.
