CMS82C55AZ96

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The CMS82C55AZ96 is an I/O expander, a part of the interface category. It is designed to expand the I/O capacity of a microcontroller, allowing more digital logic to be controlled with one device. This is particularly helpful with resource-constrained, space-constrained, and cost-constrained applications.

The CMS82C55AZ96 provides 8-bit port expanders, with each port having up to three ports. It provides 4-bit ports, 6-bit ports, or 8-bit ports, and can be configured for input or output. It has an internal pull-up/pull-down resistor for each port, allowing for easy wiring. Configuration and control are done through external bus, allowing for flexible interfacing with microprocessors, DSPs, or any other device that uses a compatible bus.

The CMS82C55AZ96 has several common application fields, such as automotive, industrial, medical, consumer, and recreational electronics. In automotive applications, the expander can simplify and reduce the wiring of the car and make it easier to control the various digital logic circuits. In industrial applications, it can be used in automated and robotic systems, such as automated gate openers, and in medical applications it can be used to simplify the wiring of medical equipment.

The working principle of the CMS82C55AZ96 is fairly simple. It consists of an external bus, which is connected to the microcontroller or other device. When the device receives a command, it reads the data from the bus and sets the corresponding state of the digital logic. The state of the logic can then be monitored, and when the logic state changes, the corresponding data is written back to the bus.

In addition to the external bus, the CMS82C55AZ96 also has an internal bus, which connects the ports to each other. All of the ports can be programmed to be either input or output, and their state can be configured through an internal register. The CMS82C55AZ96 also features several interrupts, which can be used to notify the microcontroller when change in logic state occurs.

The CMS82C55AZ96 is an extremely useful I/O expander, allowing more digital logic to be controlled with one device. It has several common application fields, from automotive to industrial to medical, and its working principle is simple and reliable. The internal pull-up/pull-down resistors make for easy wiring, and the ability to configure and control through an external bus makes for flexible interfacing.

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