ID82C54

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The 82C54 programmable interval timer (PIT) is a commonly used integrated circuit which can be used to measure and generate timed intervals with resolutions ranging from nano-seconds to hours. It is a versatile timer component and is used in a variety of applications including frequency measurements, electronic control systems, embedded systems, and audio/video equipment. This article will discuss the application field and working principle of the 82C54.

The 82C54 is a three-channel, programmable interval timer/counter which can measure and generate intervals with a 16-bit resolution. It includes three 16-bit up and down \ counters, each with its own clock, gate and control specs. The accuracy of the counter is enhanced by three external clocks which can be used to divide and multiply the original 16-bit resolution. With a 16-bit resolution, it is possible to achieve granularity as low as 0.392 microseconds.

The 82C54 can be used in a variety of applications involving timed intervals. The most common are frequency measurements and electronic control systems. Frequency measurements involve the measurement of an input signal in terms of its frequency and period, while electronic control systems involve the use of the 82C54 to regulate the operation of different electronic circuits. Additionally, the 82C54 can be used in embedded systems, such as automotive computers and remote control devices, to measure and generate timed intervals. It is also used in audio and video equipment to generate signals at specific intervals to regulate the operation of components.

In terms of its working principle, the 82C54 is based on the same logic as its predecessors, the 8253 and 8254 programmable interval timers. It employs three independent sixteen bits counters, each with its own clock and gate control. The three timers can operate in either free-running or single-shot mode and can be programmed for delay times, event counters, and rate generators. The 82C54 can also be used to generate signals that match a desired frequency and duty-cycle.

The 82C54 is programmable through the use of special control and status registers. The control registers are used to configure each of the three counters and the status registers are used to read the current state of the counters. Additionally, the 82C54 contains a latch register which can be used to latch the contents of the counters. All of these features make the 82C54 incredibly versatile, allowing it to be used in a variety of different applications.

In conclusion, the 82C54 is a versatile programmable interval timer that can be used to measure and generate timed intervals with resolutions ranging from nano-seconds to hours. It is commonly used to measure and regulate frequencies, as well as in electronic control systems, embedded systems, and audio/video equipment. The 82C54 is based on the same logic as its predecessors and is programmed by the use of special control and status registers. This allows for a great degree of flexibility and makes the 82C54 an invaluable tool for a range of applications.

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