CS82C55A-596

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CS82C55A-596 is a popular device used in many industries to help expand input/output operations. This device is classified as an interface - I/O expander, and is able to provide up to forty-eight bidirectional I/O bits. This device is useful in applications such as peripheral expansion, data transfers, high-speed handshaking, serial and parallel interfacing, and in applications that require direct addressing and bus arbitration.

This device has numerous pins, some of which are for power, ground, and other selected voltages under the control of the application circuit. All control inputs as well as the actual data transfer are provided via an 8-bit microcontroller compatible bus. The Bus Interface Unit (BIU) is the component responsible for this data transfer, allowing the system bus to interact with the device. The other pins are responsible for holding status and address information, enable input, chip enables, interrupt request, ground, supply voltage, and other valid addresses.

The CS82C55A-596 is further divided into three sections, the System Bus Interface Unit (BIU), the Port Handshaking Unit (PHU), and the I/O Expansion Port (IE). The BIU allows for the transfer of data between the system bus and the Port Handshaking Unit. The PHU is responsible for the handshaking, validating and decoding address and control signals from the system bus, as well as transferring the same data bits to the I/O expansion port. The I/O Expansion Port interfaces bidirectional I/O signals between its associated registers, external devices, or other system buses.

This device is designed to function in an asynchronous mode and employs key types of external control signals. The eight address bus bits, the eight data bus bits, the two interrupt request signals and the two chip enable signals are all allowing the device to facilitate fast data transfers. The two chip enable signals are also used to activate the registers, allowing fast write and read operations. The two interrupt request signals work together to indicate the readiness of the device to transfer data.

The port handshaking unit of the CS82C55A-596 is responsible for managing the data toward the I/O expansion port. This is done by decoding incoming data signals, validating them, and then transferring them to the registers. The handshaking unit also facilitates the transfer of valid I/O data to the system bus or to the internal circuitry of the device. The port handshaking unit has the ability to manage up to sixteen different handshaking signals, making data transfers easy and efficient.

In order for the device to operate correctly, the I/O expansion port must be configured in a specific way. It must include a total of 40 bits of bidirectional data transfer, 8 read address lines, 8 write address lines, and 2 chip enable signals. The entire port must be set up in the same way each time it is used, otherwise the port will not function correctly. After the port is configured, the device is able to provide up to forty-eight bidirectional I/O bits.

The CS82C55A-596 is an interface - I/O expander that can help simplify operations by providing up to forty-eight bidirectional I/O bits. It features an 8-bit microcontroller compatible bus that allows for data transfer, as well as two interrupt request signals and two chip enable signals. It is further divided into three sections, with the System Bus Interface Unit responsible for data transfer, the Port Handshaking Unit responsible for validating and decoding signals, and the I/O Expansion Port responsible for I/O signals between external devices and registers. With the CS82C55A-596, companies and organizations can easily expand input/output operations.

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