H8S/20115R Group, H8S/20103R Group microcontrollers have improved usability and capabilities by enhancing the basic functions (timers, serial interface, and D/A converter) of 64-pin H8/300H Tiny products and adding new functions (event link controller and peripheral I/O mapping controller) plus a data transfer controller. They are also equipped with a built-in high-precision high-speed on-chip oscillator.
With 256 Kbytes of flash memory and 12 Kbytes of RAM built-in, real-time OS can be embedded.
An on-chip debugging emulator (E8a) is supported, providing a low-cost development environment.


Key Features:

  • 16-bit high-speed H8S/2000 CPU
    • Upwardly compatible with H8/300H CPUs at object level
    • General-register architecture (sixteen 16-bit general registers)
    • 65 basic instructions
  • Peripheral functions
    • Timer RA
    • Timer RB
    • Timer RC
    • Timer RD (2 units)
    • Timer RE
    • Timer RG
    • 8-bit timers (TMR)
    • Watchdog timer
    • SCI (asynchronous or clock synchronous serial communication interface) x three channels
    • I2C bus interface/synchronous serial communication unit
    • Serial communication interface (SCIX)
    • 10-bit A/D converter
    • 8-bit D/A converter
    • POR/LVD (power-on reset & low-voltage detection circuit)
    • Low-speed on-chip oscillator
    • Event link controller
    • Peripheral I/mapping controller
    • Data transfer controller

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Hardware Design Support

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Reference oscillator circuit constants The resonators for which the operation is verified and their oscillator constants are shown below.
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