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UART

UART is a widely used serial communication protocol that allows microcontrollers and other devices to transmit and receive asynchronous data by framing each byte with start and stop bits without a shared clock. It transmits data sequentially one bit at a time with each byte consisting of start bit, 8 data bits least significant first, and one or more stop bits. UART is suitable for smaller distances and lower data rates between devices that share the same voltage levels.

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Anvesh Silagana
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103 views3 pages

UART

UART is a widely used serial communication protocol that allows microcontrollers and other devices to transmit and receive asynchronous data by framing each byte with start and stop bits without a shared clock. It transmits data sequentially one bit at a time with each byte consisting of start bit, 8 data bits least significant first, and one or more stop bits. UART is suitable for smaller distances and lower data rates between devices that share the same voltage levels.

Uploaded by

Anvesh Silagana
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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UART

UART (Universal Asynchronous Receiver-Transmitter) is a widely used communication protocol that


allows for serial communication between devices. It is commonly used for transmitting and receiving
data between microcontrollers, sensors, and other peripheral devices in embedded systems.

Asynchronous Communication: UART is an asynchronous protocol, which means that the transmitter
and receiver do not share a common clock signal. Instead, they rely on the use of start and stop bits to
frame each data byte. The start bit indicates the beginning of a data byte, while the stop bit(s) mark
the end.
Serial Data Format: UART transmits data in a sequential bit-by-bit manner. Each data byte typically
consists of a start bit, followed by 8 data bits (or fewer), and finally, one or more stop bits. The data
bits are usually transmitted least significant bit (LSB) first.
Interface diagram:

Device-1 Device-2

• For smaller distance and lower data rate UART is suitable.


• VCC & Ground for both the devices should be in same level.
• Wait count = clk/baud rate
UART Transmitter:
UART Receiver:

Simulation Result:

Output: Here, txin is equal to rxout.

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