ASCII Code | Digital Circuits - Electronics and Communication Engineering (ECE) PDF Download
Introduction
The ASCII stands for American Standard Code for Information Interchange. The ASCII code is an alphanumeric code used for data communication in digital computers. The ASCII is a 7-bit code capable of representing 27 or 128 number of different characters. The ASCII code is made up of a three-bit group, which is followed by a four-bit code.
- The ASCII Code is a 7 or 8-bit alphanumeric code.
- This code can represent 127 unique characters.
- The ASCII code starts from 00h to 7Fh. In this, the code from 00h to 1Fh is used for control characters, and the code from 20h to 7Fh is used for graphic symbols.
- The 8-bit code holds ASCII, which supports 256 symbols where math and graphic symbols are added.
- The range of the extended ASCII is 80h to FFh.
The ASCII characters are classified into the following groups:
Control Characters
- The non-printable characters used for sending commands to the PC or printer are known as control characters. We can set tabs, and line breaks functionality by this code. The control characters are based on telex technology. Nowadays, it's not so much popular in use. The character from 0 to 31 and 127 comes under control characters.
Special Characters
- All printable characters that are neither numbers nor letters come under the special characters. These characters contain technical, punctuation, and mathematical characters with space also. The character from 32 to 47, 58 to 64, 91 to 96, and 123 to 126 comes under this category.
Numbers Characters
- This category of ASCII code contains ten Arabic numerals from 0 to 9.
Letters Characters
- In this category, two groups of letters are contained, i.e., the group of uppercase letters and the group of lowercase letters. The range from 65 to 90 and 97 to 122 comes under this category.
ASCII Table
The values are typically represented in ASCII code tables in decimal, binary, and hexadecimal form.
Example 1: (10010101100001111011011000011010100111000011011111101001 110111011101001000000011000101100100110011)2
Step 1: In the first step, we we make the groups of 7-bits because the ASCII code is 7 bit.
1001010 1100001 1110110 1100001 1010100 1110000 1101111 1101001 1101110 1110100 1000000 0110001 0110010 0110011
Step 2: Then, we find the equivalent decimal number of the binary digits either from the ASCII table or 64 32 16 8 4 2 1 scheme.
Step 3: Last, we find the equivalent symbol of the decimal number from the ASCII table.
The document ASCII Code | Digital Circuits - Electronics and Communication Engineering (ECE) is a part of the Electronics and Communication Engineering (ECE) Course Digital Circuits.
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