Manoj

2006-02-18T02:09:00.000-08:00

Power of Microcontrollers

2005-08-27T02:07:00.000-07:00

A micro controller is an integrated chip that is often part of an embedded system. The micro controller includes a CPU, RAM, ROM, I/O ports, and timers like a standard computer, but because they are designed to execute only a single specific task to control a single system, they are much smaller and simplified so that they can include all the functions required on a single chip.

A micro controller differs from a microprocessor, which is a general-purpose chip that is used to create a multi-function computer or device and requires multiple chips to handle various tasks. A micro controller is meant to be more self-contained and independent, and functions as a tiny, dedicated computer.

The great advantage of micro controllers, as opposed to using larger microprocessors, is that the parts-count and design costs of the item being controlled can be kept to a minimum. They are typically designed using CMOS (complementary metal oxide semiconductor) technology, an efficient fabrication technique that uses less power and is more immune to power spikes than other techniques.

There are also multiple architectures used, but the predominant architecture is CISC (Complex Instruction Set Computer), which allows the microcontroller to contain multiple control instructions that can be executed with a single macro instruction. Some use a RISC (Reduced Instruction Set Computer) architecture, which implements fewer instructions, but delivers greater simplicity and lower power consumption.

Early controllers were typically built from logic components and were usually quite large. Later, microprocessors were used, and controllers were able to fit onto a circuit board. Micro controllers now place all of the needed components onto a single chip. Because they control a single function, some complex devices contain multiple microprocessors.

Micro controllers have become common in many areas, and can be found in home appliances, computer equipment, and instrumentation. They are often used in automobiles, and have many industrial uses as well, and have become a central part of industrial robotics. Because they are usually used to control a single process and execute simple instructions, micro controllers do not require significant processing power.

The automotive market has been a major driver of micro controllers, many of which have been developed for automotive applications. Because automotive micro controllers have to withstand harsh environmental conditions, they must be highly reliable and durable. Nonetheless, automotive micro controllers, like their counterparts, are very inexpensive and are able to deliver powerful features that would otherwise be impossible, or too costly to implement.

Embedded Systems

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Power of Microcontrollers