D68000-CPU32

The D68000-CPU32 soft core is binary-compatible with the industry standard 68000’s CPU32 version of the 32-bit microcontroller. The D68000-CPU32 has a 16-bit data bus and 24-bit address data bus. It is code compatible with the MC68008, MC68010 and CPU32 (version of MC68020). The D68000-CPU32 has an improved instructions set, which allows program execution with higher performance than the standard 68000 core. It contains a built-in DoCD-BDM debugger interface. The D68000-CPU32 is delivered with fully automated test bench and complete set of tests, allowing easy package validation at each stage of SoC design flow.

• Software compatible with industry standard 68000’s CPU32
• DoCD-BDM on-chip debugger as in CPU32
• VBR register
• Optimized shifts and rotations
• Idle cycles removed to improve performance
• Shorter effective address calculation time
• Bus cycle timings identical to 68000
• 32-bit data and address registers
• 16 addressing modes:
  • Direct:
    • Data register direct – Dn
    • Address register direct – An
  • Indirect:
    • Register indirect – (An)
    • Post-increment register indirect – (An+)
    • Pre-decrement register indirect – (-An)
    • Register indirect with offset – (d16,An)
    • Indexed register indir. with offset – (d8,An,Xn)
    • Indexed register indir. with offset and base displacement – (bd,An,Xn)
  • PC relative:
    • with offset(d16,PC); with index and offset – (d8,PC,Xn)
    • with index offset and base displacement – (bd,PC,Xn)
  • Absolute data:
    • Absolute short (.W)
    • Absolute long (.L)
  • Immediate data:
    • Immediate – #data
    • Quick immediate – #n
  • Implied
• 5 data types supported:
  • bits, BCD
  • bytes, words and long words
• Arithmetic Logic Unit includes:
  • 8,16,32-bit arithmetic & logical operations
  • 16×16, 32×32 bit signed and unsigned multiplication
  • 32/16, 32/32, 64/32 bit signed and unsigned division
  • Boolean operations
• Interrupt controller:
  • 7 priority levels interrupt controller
  • Unlimited number of virtual interrupt sources
  • Vectored and auto-vectored modes
  • Format $0, $2, $C exceptions support as in CPU32
• Memory interface includes:
  • Up to 16 MB of address space
  • 16-bit data bus
  • Asynchronous bus control
• M6800 family synchronous interface
• 3- and 2- wire bus arbitration
• Supervisor and user modes
• Fully synthesizable, static synchronous design with no internal tri-states