M. Amer Iqbal Qureshi
Difference between a Microprocessor and Microcontroller
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| Difference between a Microprocessor and Microcontroller
Essentially these two devices are similar, but with a little bit of difference. A CPU which is the heart of these devices needs a host of external devices to make it communicate with real-world. A typical system would need a system to read the inputs from keyboard, and write outputs to a terminal, store intermediate processing data into some memory, and to keep permanent information into some safe place. These devices which are independent circuits, work in harmony with the CPU, to make one system. In a typical Personal Computer these devices are attached to the CPU, using hard-wired connections. This makes the system more flexible, that means you can add more memory, change capacity of hard drives, add or remove CD-ROMs, sound cards etc. A microcontroller on the other hand is made up of most of these devices built exactly within the same package. Your microcontroller will therefore contain, the CPU, RAM, ROM, Timers, I/O etc. all packed within one integrated circuit. This facilitates the development process, as well as reduce the requirements of external components, however this also means Teach Yourself PIC Microcontrollers | www.electronicspk.com | 8 you can not change, the number and type of integrated devices. The applications where a microcontroller will be used, vary. They are usually quite simple, and do not require as much processing power as a PC does, so the microcontrollers with varying amounts of RAM, ROM, I/O lines and timers etc have been made available. Essentially all are almost same, and they only vary in the number of resources available on them. So for a particular application you chose a microcontroller, not the one which has maximum resources, but the one which has just enough to do the job. Thus a microcontroller is a complete, small scale computer with all the necessary devices on-board. All you need is the external hardware, which you want to drive, like sensors and motors etc. tải về 3.06 Mb. Chia sẻ với bạn bè của bạn:
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