RENESAS Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series H8/3664N HD64N3664 H8/3664F HD64F3664 H8/3664 HD6433664 H8/3663 HD6433663 H8/3662 HD6433662 H8/3661 HD643

About this manual

The Renesas H8/3664 Group hardware manual provides detailed information on the 16‑bit single‑chip microcomputers of the H8/300H Tiny series. It describes the CPU core, system‑control modules, on‑chip peripherals, electrical characteristics, and register maps needed for designing application systems.

Target users are engineers familiar with electrical and logical circuit fundamentals who need to understand pin handling rules, safety precautions, and the undefined state behavior of the device on power‑up. The manual also references related programming and debugging documents for deeper insight.

What's inside

• General Precautions on Handling of Product
• Configuration of This Manual
• Preface
• Description of Functional Modules
• CPU and System‑Control Modules
• On‑Chip Peripheral Modules
• List of Registers
• Electrical Characteristics
• Appendix
• Index

Specifications

Frequently asked questions

What should be done with NC pins?

NC (not connected) pins must not be connected to anything.

How should unused input pins be handled?

All unused input pins should be fixed to a high or low level.

What is the state of the product when power is first supplied?

The product’s internal state is undefined until full power is supplied and a low level is applied to the reset pin.

Can the NMI pin be used when the on‑chip emulator E10T is employed?

No, the NMI pin is reserved for the E10T and cannot be used.