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8259 IP

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  • 8259A Interrupt Controller
    • Eight interrupt request input per chip
    • Up to 64 interrupt request inputs per system
    • Edge or level triggered interrupt request inputs
    • Individually maskable interrupt requestsProgrammable interrupt request priority orders
    Block Diagram -- 8259A Interrupt Controller
  • Intel 8259A Functional Equivalent Programmable Interrupt Controller
    • The DB8259S Programmable Interrupt Controller core is a full function equivalent to the Intel 8259A / Intersil 82C59A / NEC uPD8259A devices.
    • The DB8259S Interrupt Controller manages up to eight vectored priority interrupts for a microprocessor. Using multiple instantiations of the DB8259S core and programming it to cascade mode enables up to sixty-four vectored priority interrupts.
    • More than sixty four vectored interrupts can be accomplished by programming the DB8259S core to Poll Command Mode. Interrupt sources may be either edge or level triggered.
    Block Diagram -- Intel 8259A Functional Equivalent Programmable Interrupt Controller
  • Intel 8259A Functional Equivalent Programmable Interrupt Controller
    • MCS-80/85 and 8088/8086 processor modes.
    • Fully Nested Mode and Special Fully Nested Mode.
    • Special Mask Mode.
    • Buffered Mode.
    Block Diagram -- Intel 8259A Functional Equivalent Programmable Interrupt Controller
  • Intel™ Programmable Interrupt Controller
    • Functionally based on the Intel 8259 device
    • 8 Level Priority Controller
    • Expandable to 64 Levels
    • Programmable Interrupt Modes
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Semiconductor IP