Preface
The H8/3004 and H8/3005 are high-performance single-chip microcontrollers that integrate system supporting functions together with an H8/300H CPU core.
The H8/300H CPU has a 32-bit internal architecture with sixteen 16-bit general registers, and a concise, optimized instruction set designed for speed. It can address a 16-Mbyte linear address space.

The on-chip system supporting functions include RAM, a 16-bit integrated timer unit (ITU), a watchdog timer (WDT), a serial communication interface (SCI), an A/D converter, I/O ports, and other facilities.
Two operating modes offer a choice of address space size.

This manual describes the H8/3004 and H8/3005 hardware. For details of the instruction set, refer to the H8/300H Programming Manual.