UPD8259A-2

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. FEATU RES Eight Level Priority Controller Programmable Base Vector Address Expandable to 64 Levels Programmable Interrupt Modes (Algorithms) Individual Request Mask Capability Single +5V Supply (No Clocks) Full Compatibility with 8...