IS82C55AZ96

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The IS82C55AZ96 is an I/O expander from NXP Semiconductors. It is a general purpose device intended for use in applications requiring relatively large I/O capabilities. This device combines many of the features of a microcontroller and a peripheral interface device, such as I/O expansion, DMA, and interrupts. The IS82C55AZ96 provides the flexibility of a programmed input/output system and can perform multiple, simultaneous functions.

IS82C55AZ96 has twenty(20) addressable I/O pins. Each pin is serviced by a single I/O port, which can be programmed by the user to serve either as an input port or an output port. The device can be programmed to utilize edge-sensitive, level-sensitive, or both level-sensitive and edge-sensitive interrupts. The device also features four priority-leveled vectored interrupts sourced by the twenty(20) individual port pins.

The IS82C55AZ96 can be operated at speeds of up to 8 MHz and can accept data from a variety of external devices, including serial binary and parallel binary systems. The device can generate an ACK and NAK level 4-bit wide handshake protocol for communications with other peripherals and can use the begin and end bit protocol for communication with dedicated microcontrollers. The on-chip DMA module supports both synchronous and asynchronous data transfer.

IS82C55AZ96 application field includes is various industry automation, medical, automotive and consumer products. This device is used in any applications that require relatively large I/O capabilities. It is especially suitable for applications such as cash registers, robotic controllers and automobile control systems. As the device is low power and robust, it is also used in compact and cost-effective systems. The flexible interrupt system enables the device to be used in systems that require high-speed response.

The working principle of IS82C55AZ96 is simple and efficient. It has an on-chip CPU that can be programmed by using simple instructions. When an operation is initiated, the device will automatically select the port that corresponds to the I/O request, process the request, and then issue an interrupt to notify the CPU that the request has been completed. The device also provides the flexibility of a programmed input/output system. It can receive data from a variety of external devices, such as serial and parallel binary systems. After receiving the data, the device will process the data and then issue an interrupt to notify the CPU that the data is ready for use.

In conclusion, the IS82C55AZ96 from NXP Semiconductors is a powerful device intended for use in applications requiring relatively large I/O capabilities. This device combines many of the features of a microcontroller and a peripheral interface device, and is especially suitable for applications such as cash registers, robotic controllers and automobile control systems. The on-chip CPU, the flexible interrupt system, the ACK and NAK handshake protocols, the easy-to-use instructions and the low power consumption are some of its main features, making it a suitable choice for most applications.

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