NEC V25

The NEC V25 (μPD70320) is the microcontroller version of the NEC V20 processor, manufactured by NEC Corporation. Features include:

  • NEC V20 core: 8-bit external data path, 20-bit address bus, machine code compatible with the Intel 8088 (the processor used in the original IBM PC)
  • On-chip peripheral hardware mapped in memory address space
  • Two-channel 16-bit timers
  • Internal interrupt controller
  • Dual-channel UART and baud rate generator for serial communications
  • Eight register banks, base address of which can be dynamically relocated with Internal Data area Base (IDB) Register.
  • A two-channel DMA controller, enabling the direct addressing of the entire 1MB memory address space.

It was officially phased out by NEC in early 2003.

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