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Welcome to the integer boolean data types lecture and this lecture I'm going to discuss integers and

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moolie and Data Types of the VHDL language.

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First we'll start with integers.

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Integers are declared in the package standard integers have values that are whole numbers in a specified

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range.

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Which means if you have we can represent three but we cannot represent three point two we can represent

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three four but no numbers between with an integer.

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This allows you to use the plus and minus operators.

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So if you have two editors we can add them together and assign it to a third integer.

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This is the main advantage over a standard logic vector.

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However with an integer you cannot modify individual bits.

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So we just specify a range and we can change that number but we cannot individually select or change

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bits and injure as denoted by the spelling of itself.

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I n t g.

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Your example of an integer.

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We have our data class which is a signal.

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We have our signal name calling.

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Clock counter.

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And then we have our data type which is an integer specified by the integer spelling.

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And then the size of the integer and to specify the size of the integer we want to give it a range.

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So we give it a range and the keywords for that is you go range low end to the high end.

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So in this case we give it a range of 0 to max clock count.

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So whatever value or Max clock count as that is the size of our integer.

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So if our max clock count is four or integer is going to be a range from zero to 4.

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So that means the integer can be any whole number between means 0 1 2 3 and 4.

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And so that is how you initialize an integer.

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Also we can use integers in the generic which is commonly used example we have a generic called baud

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and we get the data type integer and we are giving it the value 1 9 2 0 0.

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Now if you notice in the generic We didn't give it a range.

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If you don't get your integer range it would default to 32 bits or depending upon whichever compiler

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or synthesizer you're using it will give it a specified range and a commonly is a 32 bit integer so

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it's like 0 to 65000 or some really large number.

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So if you really want to make sure that you're not using more resources then you need to.

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You can specify the range that you are the Enter to be the next type of talk about is able in a way

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and is also declared in the package standard.

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It can be either a 1 or a.

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True or false.

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In this case a one is equal to a true A zero is equal to a false as denoted by the keywords boolean

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B 0 0 0 0 0.

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An example of a boolean.

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We're going to specify the most commonly used in a generic.

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So we have a name which is synchronous reset the datatype specified boolean and then the boolean value.

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And here we're indicating it is true.

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So we could type in either true or zero or 1.

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Or false.

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Now we've covered all the data types supported by VHDL.

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Let's learn about the syntax.