A80960CA-33

80960CA OVERVIEW

The 80960CA is the second-generation member of the 80960 family of embedded processors. The 80960CA is object code compatible with the 32-bit 80960 Core Architecture while including Special Function Register extensions to control on-chip peripherals and instruction set extensions to shift 64-bit operands and configure on-chip hardware. Multiple 128-bit internal buses, on-chip instruction caching and a sophisticated instruction scheduler allow the processor to sustain execution of two instructions every clock and peak at execution of three instructions per clock.

■ 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
— 1 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
■ Four On-Chip DMA Channels
— 59 Mbytes/s Fly-by Transfers
— 32 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
■ Selectable Big or Little Endian Byte Ordering
■ 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 750 ns Typical