The MA17503 Interrupt Unit is a component of the MAS281 chip set. Other chips in the set include MA17501 Execution Unit and the MA17502 Control Unit. Also available is the peripheral MA31751 Memory Management/Block Protection Unit. The lnterrupt Unit, in conjunction with these additional chips, implements the full MIL-STD-1750A Instruction Set Architecture.

FEATURES
■ Mil-Std-1750A Instruction Set Architecture
■ Full Performance over Military Temperature Range (-55°C to +125°C)
■ Radiation Hard CMOS/SOS Technology
■ Interrupt Handler
    • 9 User Interrupt Inputs
    • Pending Interrupt Register
    • Interrupt Mask Register
    • Interrupt Priority Encoder
■ Fault Handler
    • 8 User Faults Inputs
    • Fault Register
■ Timers
    • Timer A
    • Timer B
■ Trigger-Go
■ DMA Interface
■ Interface Discretes
    • Normal Power-Up
    • Start-Up ROM Enable
    • Configuration Word Enable
■ Implements 26 MIL-STD-1750A Specified l/O Commands
■ MAS281 Integrated Built-ln Self Test
■ TTL Compatible System Interface