Renesas HD64F3664FPIV

Overview

HD64F3664FPIV 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, 64 KB on-chip ROM, 4 KB RAM, and integrated peripherals including UART, timer/counters, and I/O ports - used in industrial control panels and embedded instrumentation requiring deterministic real-time response.

For engineers reviewing the HD64F3664FPIV datasheet, HD64F3664FPIV pinout, HD64F3664FPIV application, or HD64F3664FPIV equivalent, key selection criteria include its 5V operation, 16-MHz max CPU clock, 80-pin PQFP package, on-chip flash programming capability, and support for low-power sleep/standby modes in resource-constrained embedded systems.

Technical Context

The HD64F3664FPIV implements the H8/300H CPU architecture with 24-bit address space, supporting both big-endian and little-endian data access via software configuration. It integrates a system clock generator with crystal, ceramic resonator, or external clock input options, plus independent subclock circuitry for real-time clock functions.

Peripheral modules include three 16-bit timer/counters (one with PWM output), two asynchronous serial interfaces (UART), a watchdog timer, and 64 general-purpose I/O pins configurable as inputs, outputs, or alternate-function signals - all managed through dedicated control registers mapped into the memory space.

Key Specifications

Pinout & Package

HD64F3664FPIV is housed in an 80-pin PQFP (Plastic Quad Flat Package) with 0.65 mm lead pitch and 14 mm × 20 mm body size. Pin assignments follow Renesas' standardized H8/3664 Group layout, with dedicated power, ground, clock, reset, and peripheral signal groups.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F3664FPIV, HD64F3687FPIV adds CAN and ADC at the cost of increased BOM and layout complexity, while HD64F3694FPIV offers memory headroom for scalable firmware - both retain identical power management, timer, and I/O capabilities.

Availability

HD64F3664FPIV is available at Aetrix Electronics and suitable for industrial control panels, embedded data loggers, and medical handheld devices requiring stable component supply and long-term lifecycle support.

Supply support for HD64F3664FPIV 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The H8/3664 Group, including HD64F3664FPIV, was designed for cost-sensitive, low-power embedded applications demanding real-time determinism, on-chip nonvolatile storage, and robust I/O - targeting industrial automation and portable instrumentation.

FAQ

What is the maximum operating frequency of the HD64F3664FPIV?

The HD64F3664FPIV supports a maximum CPU clock frequency of 16 MHz, achieved using an external crystal, ceramic resonator, or clock source connected to XTAL1/XTAL2. At this rate, instruction cycles execute in 62.5 ns, enabling tight timing control for real-time tasks such as motor commutation or sensor sampling. The HD64F3664FPIV's system clock generator includes prescalers to derive lower-frequency clocks for peripherals without sacrificing CPU performance.

Does the HD64F3664FPIV support in-system programming?

Yes, the HD64F3664FPIV features 64 KB of on-chip flash ROM that supports in-system programming via its built-in boot mode and UART interface. Using the single-power-supply F-ZTAT™ on-board programming method, firmware updates can be performed without removing the HD64F3664FPIV from the target board. This capability eliminates the need for external programmers in production and field maintenance, reducing total cost of ownership.

What power-saving modes does the HD64F3664FPIV offer?

The HD64F3664FPIV provides five low-power operating modes: Active, Sleep, Standby, Subsleep, and Subactive. In Subsleep mode, current consumption drops to ≤10 µA while retaining RAM contents and subclock operation - ideal for battery-powered applications requiring periodic wake-up. Mode transitions are controlled via SYSCR1/SYSCR2 registers, and wakeup sources include external interrupts, timer events, or serial receive activity - all configurable without external components.

Is the HD64F3664FPIV pin-compatible with other H8/3664 family members?

Yes, the HD64F3664FPIV shares the same 80-pin PQFP package and pin assignment with other members of the H8/3664 Group, including HD64F3687FPIV and HD64F3694FPIV. This allows direct PCB footprint reuse across variants. However, functional differences - such as added CAN in HD64F3687FPIV or expanded memory in HD64F3694FPIV - require corresponding firmware and schematic updates despite identical pinouts.

What development tools are supported for the HD64F3664FPIV?

Renesas provides full toolchain support for the HD64F3664FPIV, including the H8S/H8/300 Series C/C++ Compiler (REJ10B0058), High-performance Embedded Workshop 3 IDE (REJ10B0026), and E7/E8 in-circuit emulators. These tools enable debugging via NMI-reserved JTAG-like interfaces, register-level inspection, and flash programming. Application notes such as REJ05B0520 detail single-supply on-board programming workflows specifically validated for HD64F3664FPIV.