Serial port communication, Computer Engineering

Assignment Help:

The 68HC11F1 has two types of serial ports namely asynchronous (SCI) and synchronous (SPI). The most common form of communication device used in control is the SCI as this provides the user with a variable baud rate, stop bits, start bits, but no parity. The SCI occupies the same pins as the parallel port D. Similar to the parallel ports the control registers are memory mapped i.e.

      Address   Register
      0x002b  Baud rate
       0x002c    SCI control 1 SCCR1
      0x002d  SCI control 2 SCCR2
       0x002e    SCI status SCSR
      0x002f    SCI Communication data register SCDR
 
Before we use the SCI we must first configure the serial channel with the correct protocol, normally most systems use a baud rate of 9600, 1 stop bit and no parity. The first two registers are used to configure these parameters. The next register is used to handle the status of the SCI i.e. is it ready to transmit or have I received data. Finally data is actually transmitted/ received via the data register SCDR. Let us consider an example.


Related Discussions:- Serial port communication

Linux, Discuss the risks of having a single root user and how more limited ...

Discuss the risks of having a single root user and how more limited management abilities can be given to others users on Linux/UNIX systems

Illustrate layout of magnetic disk, Q. Illustrate Layout of Magnetic Disk? ...

Q. Illustrate Layout of Magnetic Disk? Head is a relatively small device capable of reading from or writing to a part of platter rotating beneath it. This gives rise to organiz

Find the conversion time & conversion rate of A/D converter, Find the conve...

Find the conversion time of a Successive Approximation A/D converter which uses a 2 MHz clock and a 5-bit binary ladder containing 8V reference. What is the Conversion Rate? An

Selection - artificial intelligence, Selection - artificial intelligence: ...

Selection - artificial intelligence: However the first step is to choose the individuals that will have a shot at becoming the parents of the next generation. Hence this is kn

Characteristics of magnetic disk, Q. Characteristics of Magnetic disk? ...

Q. Characteristics of Magnetic disk? Tracks and Sectors: Disk is divided in concentric rings known as tracks. Thus a track is one complete rotation of disk underneath read/wr

Define device interface, Define device interface. The buffer registers ...

Define device interface. The buffer registers DATAIN and DATAOUT and the status flags SIN and SOUT are part of circuitry commonly called as a device interface.

Explain about open system, Q. Explain about Open System? The 'Open Syst...

Q. Explain about Open System? The 'Open System' is a system within its environment. It receives input from environment as well as provides output to environment.  Illustrati

Inserting external media in the web page, Step 1: Click on the icon in the ...

Step 1: Click on the icon in the object tool bar Or Insert -> Media -> Choose the media type to be inserted Step 2: Find and select the file required (browse) Step 3: C

Illustrate master-slave flip-flop, Q. Illustrate Master-Slave Flip-Flop? ...

Q. Illustrate Master-Slave Flip-Flop? Master slave flip-flop comprise two flip-flops. One is master flip-flop and other one is known as slave flip-flop. Fig below shows impleme

Show encoding data options, Q. Show Encoding data options? PVM uses SUN...

Q. Show Encoding data options? PVM uses SUN's XDR library to make a machine independent data format if you request it. Settings for encoding option are:  PvmDataDefault: Use

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd