32-BIT HIGH-PERFORMANCE SUPERSCALAR EMBEDDED MICROPROCESSOR

• Socket and Object Code Compatible with 80960CA

• Two Instructions/Clock Sustained Execution

• Four 71 Mbytes/s DMA Channels with Data Chaining

• Demultiplexed 32-Bit Burst Bus with Pipelining

■ 32-Bit Parallel Architecture

— Two Instructions/clock Execution

— Load/Store Architecture

— Sixteen 32-Bit Global Registers

— Sixteen 32-Bit Local Registers

— Manipulates 64-Bit Bit Fields

— 11 Addressing Modes

— Full Parallel Fault Model

— Supervisor Protection Model

■ Fast Procedure Call/Return Model

— Full Procedure Call in 4 Clocks

■ On-Chip Register Cache

— Caches Registers on Call/Ret

— Minimum of 6 Frames Provided

— Up to 15 Programmable Frames

■ On-Chip Instruction Cache

— 4 Kbyte Two-Way Set Associative

— 128-Bit Path to Instruction Sequencer

— Cache-Lock Modes

— Cache-Off Mode

■ High Bandwidth On-Chip Data RAM

— 1 Kbyte On-Chip Data RAM

— Sustains 128 bits per Clock Access

■ Selectable Big or Little Endian Byte Ordering

■ Four On-Chip DMA Channels

— 71 Mbytes/s Fly-by Transfers

— 40 Mbytes/s Two-Cycle Transfers

— Data Chaining

— Data Packing/Unpacking

— Programmable Priority Method

■ 32-Bit Demultiplexed Burst Bus

— 128-Bit Internal Data Paths to and from Registers

— Burst Bus for DRAM Interfacing

— Address Pipelining Option

— Fully Programmable Wait States

— Supports 8-, 16- or 32-Bit Bus Widths

— Supports Unaligned Accesses

— Supervisor Protection Pin

■ High-Speed Interrupt Controller

— Up to 248 External Interrupts

— 32 Fully Programmable Priorities

— Multi-mode 8-Bit Interrupt Port

— Four Internal DMA Interrupts

— Separate, Non-maskable Interrupt Pin

— Context Switch in 625 ns Typical

■ On-Chip Data Cache

— 1 Kbyte Direct-Mapped, Write Through

— 128 bits per Clock Access on Cache Hit