NEC UPD8259
The NEC pPD8259-5 is a programmable interrupt controller directly compatible with the 8080A/8085A/pPD780(Z80™). It can service eight levels of interrupts and contains on-chip logic to expand interrupt capabilities up to sixty-four levels with the addition of other pPD8259-5's.| Part No. | UPD8259 |
|---|---|
| Datasheet | UPD8259 Download |
| Manufacturer |  NEC |
| Description | PROGRAMMABLE INTERRUPT CONTROLLER |
| Buy | Stock & Price |
DESCRIPTION
The user is offered a selection of priority algorithms to tailor the priority processing to meet his systems requirements. These algorithms can be dynamically modified during operation, expanding the versatility of the microprocessor system. F EATUR ES● NEC now Supplies pPD8259-5 to pPD8259 Requirements
● Eight Level Priority Controller
● Programmable Base Vector Address
● Expandable to 64 Levels
● Programmable Interrupt Modes (Algorithms)
● Individual Request Mask Capability
● Single +5V Supply ±10% (No Clocks)
● Full Compatibility with 8080A
● pPD8259-5 Compatible with 8085A Speeds
● Available in 28 Pin Plastic and Ceramic Packages PIN CONFIGURATION cs WR RD D7 DS D5 D4 D3 D2 D1 DO CASO CAS1 GNQ VCC AO iNTA IR7 IRS IR5 IR4 IR3 IR2 IR1 IRO INT SP CAS 2 PIN NAMES D7 - DO RD WR AO CAS2- CASO SP INT INTA IRO-IR7 l:§" Data Bus (Bi-Directional) Read Input Write input Command Select Address Cascade Lines Slave Program Input Interrupt Output Interrupt Acknowledge Input Interrupt Request Inputs Chip Select II TM: Z80 is a registered trademark of Zilog, Inc.
