Renesas HD64F3664FYV

Overview

HD64F3664FYV 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 I²C-compatible serial interface - used in industrial control panels requiring deterministic real-time response and low-power operation.

For engineers reviewing the HD64F3664FYV datasheet, HD64F3664FYV pinout, HD64F3664FYV application, or HD64F3664FYV equivalent, this page delivers verified package mapping (LQFP-100), confirmed clock architecture (main + subclock generators), validated power-down modes (Sleep, Standby, Subsleep), and two field-tested alternative microcontrollers for legacy H8 migration paths.

Technical Context

The HD64F3664FYV implements the H8/300H CPU core with 24-bit address space, supporting up to 16 MB external memory expansion via multiplexed address/data bus. It integrates dual clock domains: a main system clock (up to 20 MHz) generated from crystal, ceramic resonator, or external source, and a dedicated 32.768-kHz subclock for RTC and low-power wake-up timing.

Its peripheral set includes three 16-bit timer/counters (one with input capture/output compare), two asynchronous serial interfaces (UART mode only), one synchronous serial interface (I²C-compatible), and 80 general-purpose I/O pins distributed across 10 ports - all managed through programmable port mode registers and interrupt edge-select logic.

Key Specifications

Pinout & Package

HD64F3664FYV is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow standard H8/3664 Group layout per Rev. 6.00 Hardware Manual, Section 1.3–1.4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F3664FYV, HD64F3687FV offers higher memory and CAN capability within the same footprint but demands CAN-aware firmware, while R5F100LEAFB provides superior ultra-low-power operation and LIN support at the cost of full software rework - making HD64F3664FYV optimal for maintaining legacy H8 codebases with moderate I/O and timing requirements.

Availability

HD64F3664FYV is available at Aetrix Electronics and suitable for industrial PLC modules, factory floor HMIs, automated test fixtures, and building automation controllers requiring stable component supply and long-lifecycle support.

Supply support for HD64F3664FYV 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 industrial, automotive, and infrastructure markets.

The H8/3664 Group was designed for cost-sensitive, real-time embedded control applications demanding high reliability, low power, and seamless integration of communication peripherals - particularly in factory automation and test equipment.

FAQ

What is the maximum system clock frequency supported by the HD64F3664FYV?

The HD64F3664FYV supports a maximum system clock frequency of 20 MHz when using an external crystal, ceramic resonator, or clock source. This frequency enables approximately 12.5 million instructions per second (MIPS) performance, sufficient for real-time control tasks such as motor commutation and protocol stack processing. The HD64F3664FYV's clock pulse generator includes prescalers and dual clock domains to maintain timing integrity across active and low-power modes.

Does the HD64F3664FYV include on-chip flash memory, and what is its capacity?

Yes, the HD64F3664FYV includes 128 KB of on-chip flash memory organized for in-system programming (ISP). This flash supports sector erase, write-protection bits, and boot-mode selection - allowing firmware updates in the field without removing the HD64F3664FYV from the board. The memory is rated for 10,000 write/erase cycles and retains data for 20 years at 85°C, meeting industrial longevity requirements.

How many general-purpose I/O pins does the HD64F3664FYV provide, and how are they configured?

The HD64F3664FYV provides 80 general-purpose I/O pins distributed across 10 ports (P0–P9), all accessible in the 100-pin LQFP package. Each pin is individually configurable via port mode registers to operate as a digital input, push-pull output, open-drain output, or peripheral function (e.g., UART TX/RX, timer input capture). Unused inputs must be externally pulled high or low to prevent floating-state-induced current leakage - a requirement explicitly documented in the HD64F3664FYV Hardware Manual.

What low-power modes are available on the HD64F3664FYV, and what is the lowest current consumption?

The HD64F3664FYV supports four low-power modes: Sleep, Standby, Subsleep, and Subactive. In Subsleep mode - where only the 32.768-kHz subclock domain remains active - typical current consumption is ≤1.5 µA at 25°C. This mode retains RTC functionality and allows wake-up via external interrupt or subclock alarm, making it ideal for battery-powered monitoring nodes. Power mode selection is controlled via SYSCR1 and SYSCR2 registers, with entry/exit sequences defined in the HD64F3664FYV Hardware Manual Section 6.

Is the HD64F3664FYV pin-compatible with other devices in the H8/3664 Group, such as the HD64F3687FV?

Yes, the HD64F3664FYV is pin-compatible with the HD64F3687FV in the LQFP-100 package, sharing identical pin assignments for power, reset, clock, and all 80 I/O lines. However, the HD64F3687FV adds CAN-related signals on pins otherwise designated as NC or secondary functions in the HD64F3664FYV, so CAN functionality requires verification of pin usage and firmware adaptation. Both devices share the same memory map and core architecture, enabling partial code reuse when migrating from HD64F3664FYV to HD64F3687FV.