Page 2 :
CONTENTS, , * Introduction to UART, , * Basics of Serial Communication -- RS-232, ‘Basic block diagram of UART, , ‘Transmitter block of UART, , * Receiver block, , , , @ * Interfacing with PIC microcontroller, * Programming of UART, , * Applications

Page 3 :
°, , INTRODUCTION OF UART &, USART, , UART ~ Stands for Universal Asynchronous Receiver Transmitter, USART — Stands for Universal Synchronous Asynchronous Receiver Transmitter, RS-232 we impl t | port wit R, , Actually UART receives/sends data to microprocessor/microcontroller through data, bus. The remaining part of signal handling of RS-232 is done by UART Le. start bit,, stop bit, parity ete.

Page 4 :
WHY USE A UART?, , * High speed is not required, * An inexpensive communication link between two devices is required, , * UART Fai, ®@ Single wire for each direction (plus ground wire), ® Asynchronous because no clock signal is transmitted, , ® Relatively simple hardware

Page 5 :
BASICS OF SERIAL COMMUNICATION, , Bit rate:, -Number of bits sent every second (BPS), Baud rate:, , -Number of symbols sent every second, where every symbol can represent more than, one bit., , Ex. high-speed modems which use phase shifts to make every data transition period, represent more than one bit., , -For the PIC 16f877A’s USART, with every clock tick one bit is sent, each symbol, , represents one bit,, , -So, we can consider bit rate and baud rate the same thing.