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UPD8259A-2 - PROGRAMMABLE INTERRUPT CONTROLLER

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Description

A positive transition on an IR input sets the corresponding bit in the Interrupt Request Register, and at the same time the INT

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Datasheet Details

Part number UPD8259A-2
Manufacturer NEC
File Size 918.37 KB
Description PROGRAMMABLE INTERRUPT CONTROLLER
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NEe Microcomputers, Inc. NEe },PD8259A }'PD8259A-2 PROGRAMMABLE INTERRUPT CONTROLLER DESC RIPTI ON The NEC J.lPD8259A is a programmable interrupt controller directly compatible with the 8080A/8085A/8086/8088 microprocessors. It can service eight levels of interrupts and contains on-chip logic to expand interrupt capabilities up to 64 levels with the addition of other J.lPD8259As. The user is offered a selection of priority algorithms to tailor the priority processing to meet his system requirements. These can be dynamically modified during operation, expanding the versatility of the system. The J.lPD8259A is completely upward compatible with the J.lPD8259-5, so software written for the J.lPD8259-5 will run on the J.lPD8259A.
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