rbmorse. let me explain to you. I'll use small words so you can understand. Serial communication was something that was WAY back in the days when a dial up modem used a 9600 thru 28800 baud rate modem, to change the telephone signal to bits, the stream ran serial communications as in ones (1) and zeros (0), which you probably know as binary, a modem (serial type) had to speak to the computer in
MACHINE language. Here is a good reference to that as well. In
telecommunication and
computer science,
serial communication is the process of sending
data one
bit at a time, sequentially, over a
communication channel or
computer bus. This is in contrast to
parallel communication, where several bits are sent as a whole, on a link with several parallel channels. Serial communication is used for all long-haul communication and most
computer networks, where the cost of
cable and
synchronization difficulties make parallel communication impractical. Serial computer buses are becoming more common even at shorter distances, as improved
signal integrity and transmission speeds in newer serial technologies have begun to outweigh the parallel bus's advantage of simplicity (no need for serializer and deserializer, or
SerDes) and to outstrip its disadvantages (
clock skew, interconnect density). I know this prehistoric way of communication is odd to you, seeing as you probably have had a high speed connection your entire computing life. Let me further state the list below are various connections, so you are clear an analog connection uses a twisted pairs. Please exam the list below, you will get a written test to complete on Monday, a 1/3 of this semester's grading will result from your score.
Morse code telegraphy <<< Can you say this is digital?? LoL...It's the original analog!!
RS-232 (low-speed, implemented by
serial ports)
RS-422
RS-423
RS-485
I²C
SPI
ARINC 818 Avionics Digital Video Bus
Atari SIO (Joe Decuir credits his work on Atari SIO as the basis of USB)
Universal Serial Bus (moderate-speed, for connecting peripherals to computers)
FireWire
Ethernet
Fibre Channel (high-speed, for connecting computers to mass storage devices)
InfiniBand (very high speed, broadly comparable in scope to
PCI)
MIDI control of electronic musical instruments
DMX512 control of theatrical lighting
SDI-12 industrial sensor protocol
Serial Attached SCSI
Serial ATA
SpaceWire Spacecraft communication network
HyperTransport
PCI Express
SONET and
SDH (high speed telecommunication over optical fibers)
T-1,
E-1 and variants (high speed telecommunication over copper pairs)
MIL-STD-1553A/B