Renesas HD64F3664FYIV

Overview

HD64F3664FYIV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/300H Tiny Series, featuring an H8/300H CPU core with H8/300 instruction set compatibility, 128 KB on-chip ROM, 8 KB RAM, and integrated peripherals including UART, timer/counters, and I/O ports. It targets embedded control in industrial equipment and consumer appliances requiring deterministic real-time response.

For engineers reviewing the HD64F3664FYIV datasheet, HD64F3664FYIV pinout, HD64F3664FYIV application, or HD64F3664FYIV equivalent, key selection criteria include its 16-bit H8/300H architecture, 128 KB mask-ROM program memory, 8 KB SRAM, 5V operation, and 80-pin PQFP package - all critical for legacy industrial firmware migration and cost-sensitive control designs.

Technical Context

The HD64F3664FYIV implements the H8/300H CPU core with 24-bit address space, supporting up to 16 MB addressing. It integrates system control modules (clock generators, power-down modes), on-chip peripheral modules (UART, 16-bit timers, watchdog, interrupt controller), and memory management units for ROM/RAM mapping.

Its clock system supports multiple sources: main crystal (1–20 MHz), subclock (32.768 kHz), and external clock input. Power management includes Sleep, Standby, Subsleep, and Subactive modes, with module-level standby control via MSTCR1 register to selectively disable peripherals like UART or timers.

Key Specifications

Pinout & Package

HD64F3664FYIV is housed in an 80-pin PQFP (Plastic Quad Flat Package) with 0.65 mm lead pitch and 14 mm × 14 mm body size. Pin functions are defined per the H8/3664 Group Hardware Manual Rev.6.00, including dedicated reset, clock, power, and multifunction I/O pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with HD64F3664FV, the HD64F3664FYIV offers extended temperature operation critical for factory-floor deployment; versus HD64F3687FV, it provides proven reliability and lower cost in legacy 80-pin designs where memory and peripheral headroom are sufficient.

Availability

HD64F3664FYIV is available at Aetrix Electronics and suitable for industrial motor control, home appliance MCU, and factory automation I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for HD64F3664FYIV includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The H8/3664 Group belongs to Renesas' legacy 16-bit H8 Family, designed specifically for cost-effective, high-reliability embedded control in industrial equipment, consumer appliances, and building automation systems.

FAQ

What is the maximum operating frequency of the HD64F3664FYIV?

The HD64F3664FYIV operates at a maximum CPU clock frequency of 20 MHz, delivering approximately 10 million instructions per second (MIPS). This frequency is achieved using an external crystal or clock source connected to the EXTAL/CLK pins. The device's timing specifications - including bus cycle duration and peripheral response latency - are fully characterized up to this speed under 4.5–5.5 V supply and industrial temperature conditions. HD64F3664FYIV performance remains stable across its rated temperature range without derating.

Does the HD64F3664FYIV include on-chip flash memory or EEPROM?

No, the HD64F3664FYIV uses 128 KB of mask-programmed ROM for program storage, not flash or EEPROM. Mask ROM is programmed during wafer fabrication and cannot be electrically erased or rewritten in-system. This makes HD64F3664FYIV ideal for high-volume, fixed-function applications where firmware is finalized before production. For field-upgradable code, designers must use external memory or select a flash-based variant like HD64F3687FV - though it is not pin-compatible with HD64F3664FYIV.

What power management features does the HD64F3664FYIV support?

The HD64F3664FYIV supports four low-power modes: Sleep, Standby, Subsleep, and Subactive. These are controlled via SYSCR1/SYSCR2 registers and allow selective shutdown of CPU, clocks, and peripheral modules. For example, Subsleep mode retains RAM and real-time clock operation while stopping the main CPU - enabling wake-up via external interrupt or timer match. Module Standby Control Register (MSTCR1) permits granular disabling of UART, timers, or ADC to reduce active current below 10 mA in typical configurations.

Is the HD64F3664FYIV pin-compatible with other H8/3664 family members?

Yes, the HD64F3664FYIV shares identical pinout and electrical characteristics with other 80-pin PQFP variants in the H8/3664 Group, including HD64F3664FV and HD64N3664. All share the same 80-pin assignment for power, clock, reset, I/O ports, and peripheral signals. However, differences exist in temperature grade, ROM content, and minor electrical specs (e.g., AC timing tolerances), so validation in target hardware is recommended before substitution - especially for extended temperature or high-noise environments.

What development tools are supported for the HD64F3664FYIV?

The HD64F3664FYIV is supported by Renesas' legacy H8 toolchain, including the H8S/H8/300 Series C/C++ Compiler (REJ10B0058), Simulator/Debugger (REJ10B0211), and High-performance Embedded Workshop 3 IDE. Hardware debugging requires the E7 or E8 in-circuit emulator, which reserves NMI, P85, P86, and P87 pins during use. On-board programming is not supported - firmware must be mask-programmed at wafer level. Users should verify tool version compatibility with Rev.6.00 Hardware Manual and REJ09B0213 Software Manual.