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The 8259A is designed to minimize the software and real time overhead in handling multi-level priority inter- rupts. It has several modes, permitting optimization for a variety of system requirements. The 8259A is fully upward compatible with the Intel 8259.
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The 8259A Programmable Interrupt Controller handles up to eight vectored priority interrupts for the CPU. It is cascadable for up to 64 vectored priority interrupts without additional circuitry. It is packaged in a 28-pin DIP, uses NMOS technology, and requires a single +5-V supply. Circuitry is static, requiring no clock input.
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Manufacturer: NEC.
The Intel 8259A programmable Interrupt Controller handles up to eight-vectored priority interrupts for the CPU. This IC is cascadable for up to 64-vectored priority interrupts without additional circuitry. This IC is available in a 28-pin DIP package and uses NMOS technology and requires a single 5 V supply.
The DB8259A Interrupt Controller manages up to eight vectored priority interrupts for a microprocessor. Using multiple instantiations of the DB8259A core and programming it to cascade mode enables up to sixty-four vectored priority interrupts.
This datasheet has been downloaded from: www.DatasheetCatalog.com Datasheets for electronic components.
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The programmable interrupt controller 8259A from Intel is one such device. The predecessor 8259 was designed to operate only with 8-bit processors like 8085. A modified version, 8259A was later introduced that is compatible with 8-bit as well as 16-bit processors. Architecture and Signal Descriptions of 8259A.
