Serial
Communication
Yong Heui Cho @ Mokwon University
Some of slides are referred to:
[1] Sabatiana, Maulina, Nugraha, Serial Data Communication, slideshare.
Basic Computer Design
10. Role of CPU
11. CPU and Software
12. Analog and Digital I/O
13. Serial Communication
3
Communication
• Both the receiver and the transmitter must
agree on a number of different factors to
allow successful communications between
them, the most important being: protocols
3□ Courtesy to Serial Data Communication, slideshare.
SOURCE RECEIVER
COMMUNICATION
LINK
4
Transmission Mode
4□ Courtesy to Serial Data Communication, slideshare.
5
Data Format
• Data is usually arranged in a particular format, with additional
information added so that the message can be effectively
transmitted and understood at the receiving end. In summary, the
optional settings for asynchronous transmission of characters are:
– Start bit: 1
– Data bits: 5, 6, 7, 8
– Parity bits: even, odd, mark, space or none
– Stop bits: 1, l½ or 2
• As there cannot be half a bit, 1½-stop bits means that the mark
length is 50% longer than for one stop bit.
5□ Courtesy to Serial Data Communication, slideshare.
6
RS-232C Interface
6□ Courtesy to Serial Data Communication, slideshare.
7
RS-485 Interface
7□ Courtesy to Serial Data Communication, slideshare.
8
Comparison
8□ Courtesy to Serial Data Communication, slideshare.

Serial Communication

  • 1.
    Serial Communication Yong Heui Cho@ Mokwon University Some of slides are referred to: [1] Sabatiana, Maulina, Nugraha, Serial Data Communication, slideshare.
  • 2.
    Basic Computer Design 10.Role of CPU 11. CPU and Software 12. Analog and Digital I/O 13. Serial Communication
  • 3.
    3 Communication • Both thereceiver and the transmitter must agree on a number of different factors to allow successful communications between them, the most important being: protocols 3□ Courtesy to Serial Data Communication, slideshare. SOURCE RECEIVER COMMUNICATION LINK
  • 4.
    4 Transmission Mode 4□ Courtesyto Serial Data Communication, slideshare.
  • 5.
    5 Data Format • Datais usually arranged in a particular format, with additional information added so that the message can be effectively transmitted and understood at the receiving end. In summary, the optional settings for asynchronous transmission of characters are: – Start bit: 1 – Data bits: 5, 6, 7, 8 – Parity bits: even, odd, mark, space or none – Stop bits: 1, l½ or 2 • As there cannot be half a bit, 1½-stop bits means that the mark length is 50% longer than for one stop bit. 5□ Courtesy to Serial Data Communication, slideshare.
  • 6.
    6 RS-232C Interface 6□ Courtesyto Serial Data Communication, slideshare.
  • 7.
    7 RS-485 Interface 7□ Courtesyto Serial Data Communication, slideshare.
  • 8.
    8 Comparison 8□ Courtesy toSerial Data Communication, slideshare.