Low Power UART Design for Serial Data Communication (Download Full Report And Abstra
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
computer science crazy
Super Moderator

Posts: 3,048
Joined: Dec 2008
22-02-2009, 01:22 AM


With the proliferation of portable electronic devices, power efficient data transmission has become increasingly important. For serial data transfer, universal asynchronous receiver / transmitter (UART) circuits are often implemented because of their inherent design simplicity and application specific versatility. Components such as laptop keyboards, palm pilot organizers and modems are few examples of devices that employ UART circuits. In this work, design and analysis of a robust UART architecture has been carried out to minimize power consumption during both idle and continuous modes of operation.

UART, an introduction

An UART (universal asynchronous receiver / transmitter) is responsible for performing the main task in serial communications with computers. The device changes incoming parallel information to serial data which can be sent on a communication line. A second UART can be used to receive the information. The UART performs all the tasks, timing, parity checking, etc. needed for the communication. The only extra devices attached are line driver chips capable of transforming the TTL level signals to line voltages and vice versa.

To use the device in different environments, registers are accessible to set or review the communication parameters. Setable parameters are for example the communication speed, the type of parity check, and the way incoming information is signaled to the running software.

UART types

Serial communication on PC compatibles started with the 8250 UART in the XT. In the years after, new family members were introduced like the 8250A and 8250B revisions and the 16450. The last one was first implemented in the AT. The higher bus speed in this computer could not be reached by the 8250 series. The differences between these first UART series were rather minor. The most important property changed with each new release was the maximum allowed speed at the processor bus side.

The 16450 was capable of handling a communication speed of 38.4 kbs without problems. The demand for higher speeds led to the development of newer series which would be able to release the main processor from some of its tasks. The main problem with the original series was the need to perform a software action for each single byte to transmit or receive. To overcome this problem, the 16550 was released which contained two on-board FIFO buffers, each capable of storing 16 bytes. One buffer for incoming, and one buffer for outgoing bytes.

A marvelous idea, but it didn't work out that way. The 16550 chip contained a firmware bug which made it impossible to use the buffers. The 16550A which appeared soon after was the first UART which was able to use its FIFO buffers. This made it possible to increase maximum reliable communication speeds to 115.2 kbs. This speed was necessary to use effectively modems with on-board compression. A further enhancement introduced with the 16550 was the ability to use DMA, direct memory access for the data transfer. Two pins were redefined for this purpose. DMA transfer is not used with most applications. Only special serial I/O boards with a high number of ports contain sometimes the necessary extra circuitry to make this feature work. The 16550A is the most common UART at this moment. Newer versions are under development, including the 16650 which contains two 32 byte FIFO's and on board support for software flow control. Texas Instruments is developing the 16750 which contains 64 byte FIFO's.

(Download Full Report And Abstract)

Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Active In SP

Posts: 2
Joined: Jul 2010
07-07-2010, 12:31 PM

i want uart project and implimentation downlad
projects wizhard
Active In SP

Posts: 261
Joined: Jul 2010
09-07-2010, 06:30 PM

we will try to re-upload the file soon
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Active In SP

Posts: 153
Joined: Aug 2010
02-09-2010, 08:07 PM

Try these links for the full report:
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Active In SP

Posts: 2
Joined: Sep 2010
29-09-2010, 03:36 PM

hi i want to download the report of low power uart for serial communication.
seminar surveyer
Active In SP

Posts: 3,541
Joined: Sep 2010
03-01-2011, 03:31 PM

.pptx   SEMINAR ON UART .pptx (Size: 362.81 KB / Downloads: 93)

Presented By
pratish chandra dwivedi
kuldeep Kumar
devendra kumar

History of UART.
Introduction of UART.
UART types.
UART design and protocol.
Results and discussions:-
Multi-Threshold CMOS (MT-CMOS)
Complete Power Shutdown
Data –Stream Dependent Shutdown
Low Transition ASCII (LT-ASCII)


The first UART-like devices (with fixed-length pulses) were rotating mechanical switches (commutators).

The Western made Single-chip UART WD1402A around 1971.

Then Motorola introduced around 1975.

After it National Semiconductor introduced around 1980’s.

An UART (universal asynchronous receiver / transmitter) performs serial communications.

It Changes incoming parallel information to serial data.

It Perform all the tasks like timing, parity checking etc.

It is used in conjunction with other communication standards such as EIA RS-232.


Important Note..!

If you are not satisfied with above reply ,..Please


So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  DESIGN ATM CONTROLLER pdf seminar flower 1 986 22-07-2016, 02:13 PM
Last Post: mkaasees
  detecting power grid synchronization failure jaseelati 2 385 20-05-2016, 12:28 PM
Last Post: Dhanabhagya
  MOBILE TRAIN RADIO COMMUNICATION REPORT study tips 1 620 06-04-2016, 03:47 PM
Last Post: mkaasees
  FLEXIBLE POWER ELECTRONIC TRANSFORMER seminar tips 2 1,627 05-07-2015, 09:58 AM
Last Post: tunhtutaye
  electronic power generator using transistor jaseelati 0 353 31-01-2015, 01:52 PM
Last Post: jaseelati
  floating power plant ppt jaseelati 0 360 31-01-2015, 12:49 PM
Last Post: jaseelati
  inductive power transfer ppt jaseelati 0 274 23-01-2015, 02:21 PM
Last Post: jaseelati
  power theft detection via plc pdf jaseelati 0 345 22-01-2015, 03:31 PM
Last Post: jaseelati
  distributed power flow controller ppt jaseelati 0 281 21-01-2015, 03:21 PM
Last Post: jaseelati
  wireless power theft monitoring system and indication at local substations. jaseelati 0 363 10-01-2015, 03:42 PM
Last Post: jaseelati