Книга: Introduction to Microprocessors and Microcontrollers

The physical appearance of a microprocessor

The physical appearance of a microprocessor

A microprocessor is a very small electronic circuit typically ? inch (12 mm) across. It is easily damaged by moisture or abrasion so to offer it some protection it is encapsulated in plastic or ceramic. To provide electrical connections directly to the circuit would be impractical owing to the size and consequent fragility, so connecting pins are moulded into the case and the microprocessor then plugs into a socket on the main circuit board. The size, shape and number of pins on the microprocessor depend on the amount of data that it is designed to handle. The trend, as in many fields, is forever upward. Typical microprocessors are shown in Figure 1.6.

Figure 1.6 Typical microprocessors

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