Introduction to microporcessors

Prelude  BIT=Binary Digit: 0's and 1's 1 nibble=4 Bits 1 Byte= 8Bits    for example 1010 0101 1KiloByte(KB)= 1024 Bytes 1 Mega Byte(MB)= 1024KB  Digital Abstraction The digital circuit is a device that works in binary.There are only two symbols in binary(0's and 1's) . It means, input and output of digital circuits are 0’s and 1’s. Digital circuits are used to implement electronics device and it is used in real world. But in real world, there are no 0’s and 1’s. Instead of 0’s and 1’s, continuously varying voltages will be used as inputs and outputs. Because the world is analog, whatever available in reality will vary continuously. But in digital circuits 0’s and 1’s will be considered as inputs and outputs. In digital circuits range of voltages are interpreted as binary 0 and 1.Digital circuit model enables one to focus on the digital behavior of a circuit(0's and 1's), to ignore analog and transient phenomena, and to easily build larger, m...