Logic 3: Binary Codes Flashcards
Graph of digital waveform showing actual time relationship between two or more waveforms
Timing Waveform
Group of bits that convey come type of information
Data
Binary Digit
Bit
The time interval occupied by each bit in a digital waveform
Bit Time
An 8-bit group of data
Byte
A large data group
Word
The width of a single unit of data
Word Size
A 4-bit group of data
Nibble
A half byte
Nibble
Also known as 8421 code
Binary Coded Decimal
Maximum valid digits for BCD
1001
A 4-bit binary number used to represent each character of the decimal number
Binary Coded Decimal (BCD)
It is derived by adding 0011 to the decimal value
Excess-3 Code
A special code that allows only a single bit to change from one consecutive number to another
Gray Code
Used in transmitting written information via a computer
Alphanumeric Binary Codes
ASCII
American Standard Code for Information Interchange
Is a 7-bit binary code
ASCII
How many characters does ASCII have?
128
EBCDIC
Extended Binary Coded Decimal Information Code
Sign bit of positive numbers
0
Sign bit of negative numbers
1
Positive numbers are stored in ____ form, and negative numbers are stored in _____ form
true:complement
How to convert positive to negative in binary signed numbers
2’s complement
What are the basic logical operators
AND, OR, NOT
They implement logic functions
Logic Gates
A useful mathematical system for specifying and transforming logic functions
Boolean Algebra
A tabular listing of the values of a function for all possible combinations of values on its arguments
Truth Table
