This is an original September 1982 technical user's manual for the Hitachi 8-bit single-chip microcomputer series(specifically the HD6801/HD6805 or HMCS40 series, common for this era). Published by the Hitachi Semiconductor and Integrated Circuits Division, this 200+ page manual provides exhaustive documentation on the architecture, instruction set, and electrical characteristics of the microcontroller. It includes pinout diagrams, timing charts, and practical application examples for integrating these chips into early consumer electronics and industrial control systems.

Manufacturer: Hitachi, Ltd.

Condition: Used (Vintage technical manual condition; see pictures for true condition)

Model Number: ADE-602-001 (Typical Hitachi manual series code)

Extra Notes: Hitachi was a dominant force in the 1980s semiconductor market, and their 8-bit microcontrollers were ubiquitous in everything from automotive engine controllers to early home appliances. This manual is a prime example of the high documentation standards of the Japanese semiconductor industry during its most aggressive expansion phase. It is an essential reference for engineers who restore "vintage silicon" or those interested in the evolution of embedded systems.

Manufactured In: Japan