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ColdFire V4e

V4e ColdFire Core: Limited Superscalar

The V4e is designed to provide hardware support for on-chip multiprocessing for systems requiring intensive numeric processing capabilities beyond that provided by a single processor. Designs implemented in 0.18 micron technology are expected to provide 350 Dhrystone 2.1 MIPS of processing power per core when operating at 225 MHz, while migrating to 0.13 micron technology boosts the performance level to 333 MHz and up to 510 Dhrystone 2.1 MIPS per core.

The V4e is an IP Core which will be integrated into a variety of custom and standard products from Freescale. There currently are no plans for a standalone CPU version.

  • High performance IP Core for the 68K/ColdFire family
  • Partial superscalar execution
  • Harvard memory architecture resulting in enhanced bandwidth
  • Support for variable sized instruction caches and data caches
  • Minimal change-of-flow program execution time via sophisticated 2 level branch acceleration
  • Virtual memory management unit (MMU)
    • Address translation inside the core complex
    • Process partitioning
    • Expanded debug capabilities
    • Harvard, dual 32-entry, fully-associative TLBs
  • Floating point unit (FPU)
    • Double-precision implementation of the MC68060 FP ISA
    • Concurrent execution between Operand Execution Pipeline & FPU
    • IEEE-754 compliant
  • Enhanced multiply accumulate unit (MAC)
    • Single-cycle issue, optimized for 32x32 MACs
    • Four 48-bit accumulators
    • Expanded programming model
  • Dual-port RAM with user-defined address permutation
  • Hardware support for on-chip multiprocessing