Environmental Engineering Reference
In-Depth Information
Table 1 Binary numbers placed in the address bus
for consecutive addressing
and can decide for speed and power consumption.
With a judicious programming, MSP430 shows
a burst of activities and sleeps in-between. Thus
it consumes a very low average power and tasks
of high priority are done at a great speed.
The other attractive features include use of
multiple clocks of different power. It also provides
a single chip solution and eliminates the power
loss at the interfaces.
Hexadecimal
Address
Binary Address with
natural
encoding
gray encoding
00
00000000
00000000
01
00000001
00000001
02
00000010
00000011
03
00000011
00000010
REFERENCES
CONCLUSION
Agarwal, A., & Mitra, M. (2006). RFID: Promises
and problems. Techonline . Retrieved June 08,
2010, from http://www.techonline.com
In this chapter, the basic architecture and func-
tion of a microcontroller is discussed. With ex-
amples, the need for low power microcontroller
is illustrated.
Microcontrollers are of prime importance for
electronic control and communication of any
modern appliance. Any household appliance e.g.
washing machine, refrigerator, air-conditioner or
office appliances e.g. electronic printer, Photostat
copier, fax machine contains one or more micro-
controllers. Because of its bulk usage a marginal
saving in power for one MSP430 results to enor-
mous saving as a whole.
In any device design, when one feature is
optimized another feature degrades. When low
power is achieved the speed or performance may
go down. The innovative architecture of MSP430
shall be discussed in this context. Though this
microcontroller consumes negligible power its
other features are comparable to the existing
microcontrollers available in the market.
MSP430 can function in different modes rang-
ing from a high speed, high power to a low speed,
low power mode. With lots of urgent tasks in hand
it goes to high-speed, high-power mode. With a
not so urgent task it can move to moderate-speed,
moderate power mode. With no task it comes down
to the lowest power mode. This is a deep sleep
mode where negligible power is used to monitor
the wake up call. A programmer can select a mode
Baker, R. J. (2002). CMOS: Circuit design, layout,
and simulation . Wiley.
Bell, D. A. (2007). Electronic devices and circuits .
India: Prentice Hall of India.
Bogush, M. V., Kuz'minov, I. I., & Yu Orlov, S.
(2006). Microcontroller-based system for control-
ling annealing in bell-type furnaces. Metallurgist
Journal , 50 , 148-151. .doi:10.1007/s11015-006-
0055-0
Chae, H., Yeager, D. J., Smith, J. R., & Fu, K.
(2007). Maximalist cryptography and computation
on the WISP UHF RFID tag. Paper presented at
the Conference on RFID Security 2007, Malaga.
Retrieved June 08, 2010, from http://seattle.intel-
research.net/~jrsmith/WISP-RFIDSec07.pdf
Davies, J. H. (2008). MSP430 microcontroller
basics . Burlington, MA: Newnes, Elsevier.
Gray, P. R., Hurst, P. J., Lewis, S. H., & Meyer,
R. G. (2001). Analysis and design of analog
integrated circuits . New York, NY: John Wiley.
Kamal, R. (2003). Embedded systems: Architec-
ture, programming and design . New Delhi, India:
Tata McGraw-Hill.
Search WWH ::




Custom Search