By Steven Barrett, Mitchell Thornton
This textbook offers practising scientists and engineers a sophisticated remedy of the Atmel AVR microcontroller. This ebook is meant as a follow-on to a formerly released e-book, titled Atmel AVR Microcontroller Primer Programming and Interfacing. many of the content material from this past textual content is retained for completeness.
This booklet will emphasize complicated programming and interfacing abilities. We specialise in procedure point layout which include numerous interacting microcontroller subsystems. the 1st bankruptcy discusses the procedure layout technique. Our procedure is to supply the abilities to quick wake up to hurry to function the the world over well known Atmel AVR microcontroller line through constructing platforms point layout abilities. We use the Atmel ATmega164 as a consultant pattern of the AVR line. the information you achieve in this microcontroller might be simply translated to each different microcontroller within the AVR line. In succeeding chapters, we conceal the most subsystems aboard the microcontroller, supplying a quick concept part by means of an outline of the similar microcontroller subsystem with accompanying software program for the subsystem. We then supply complex examples exercise many of the beneficial properties mentioned. In all examples, we use the c program languageperiod. The code supplied may be easily tailored to the big variety of compilers on hand for the Atmel AVR microcontroller line. We additionally contain a bankruptcy describing find out how to interface the microcontroller to a wide selection of enter and output units. The e-book concludes with a number of targeted process point layout examples using the Atmel AVR microcontroller. desk of Contents Embedded structures layout / Atmel AVR structure evaluate / Serial verbal exchange Subsystem / Analog to electronic Conversion (ADC) / Interrupt Subsystem / Timing Subsystem / Atmel AVR working Parameters and Interfacing / approach point layout
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Additional info for Embedded Systems Design with the Atmel AVR Microcontroller
It has been in use for many decades, so some of the characters and actions listed in the ASCII table are not in common use today. However, ASCII is still the most common method of encoding alphanumeric data. For example, the capital letter “G” is encoded in ASCII as 0x47. The “0x” symbol indicates the hexadecimal number representation. Unicode is the international counterpart of ASCII. It provides standardized 16-bit encoding format for the written languages of the world. ASCII is a subset of Unicode.
1. What is a RISC processor? 2. How does the ATmega164 interact with the external world? 3. What are the different methods of applying a clock source to the ATmega164? List the inherent advantages of each type. 4. Describe the three different types of memory components aboard the ATmega164. What is each used for? 40 CHAPTER 2. 5. Describe the three registers associated with each input/output port. 6. What is the advantage of activating pull-up resistors with the digital input pins? 7. With a specific port selected, can some port pins be declared as output pins while others as input pins?
4 mA. 1 microamp of current from the voltage source. 3 SPEED GRADES The ATmega164 operates with a clock speed from 0 to 20 MHz. As previously discussed, the operating speed of the microcontroller is set by the time base chosen for the processor. Since faster microcontroller operation is not always the best option, the system designer must determine the optimal speed of microcontroller operation for a given application. The microcontroller’s power consumption is directly related to operating speed.