Universal Asynchronous Receiver and Transmitter (UART) (17 slides)
Summary :
Table of Contents
- Introduction
- Serial communication
- Baud rate
- Universal Asynchronous Receiver/Transmitter (UART)
- Features of UART
- A block schematic of the UART transmitter
- UART Control Register: UCR
- Block diagram of the UART receiver
- UBRR settings at various crystal frequencies
- Analog comparator
- Conclusion
Abstract
Serial communications is the process of sending data one bit at one time, sequentially, over a communication channel or computer bus. Serial communications is used for all long haul communications and most computer networks, where the cost of cable and synchronization difficulties make parallel communications impractical. Serial transmission is commonly used with modems and for non-networked communication between computers, terminals and other devices. The universal asynchronous receiver/transmitter (uart) controller is the key component of the serial communications subsystem of a computer. The uart takes bytes of data and transmits the individual bits in a sequential fashion. At the destination, a second uart re-assembles the bits into complete bytes.
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