HD64F3644H Microcontroller

Updated: 2026-09-15

Overview

The HD64F3644H is a 32-bit microcontroller developed by Renesas Electronics, part of the H8S/300H series. It is based on a high-performance RISC architecture, optimized for embedded applications requiring real-time control and low power consumption. With integrated flash memory, RAM, and a range of peripherals, it simplifies system design for industrial automation, automotive systems, and smart devices. The microcontroller operates at clock speeds up to 20 MHz and offers robust communication interfaces like UART, SPI, and I2C.

Structure and Working Principle

The HD64F3644H features a single-chip design with a central 32-bit CPU core, supported by on-chip flash memory (up to 256 KB) and RAM (up to 16 KB). The CPU executes instructions in a pipelined manner, enhancing performance for control tasks. Peripherals include multiple timers, analog-to-digital converters (ADCs), and serial communication modules. The microcontroller operates on a 3.3V or 5V supply, with low-power modes to reduce energy consumption during idle states.

Key Features

The HD64F3644H stands out for its balance of performance and power efficiency. Its 32-bit architecture enables fast data processing, while integrated peripherals reduce the need for external components. Notable features include a 10-bit ADC for analog signal acquisition, multiple PWM outputs for motor control, and hardware-based interrupt handling for real-time responsiveness. The microcontroller also supports in-circuit programming, facilitating firmware updates.

Application Areas

This microcontroller is widely used in industrial automation for PLCs, motor control, and sensor interfacing. Its reliability and real-time capabilities make it suitable for automotive applications like dashboard systems and engine control. In consumer electronics, the HD64F3644H powers smart home devices, wearables, and portable gadgets. Its low-power modes extend battery life in wireless and IoT applications.

Maintenance and Precautions

To ensure longevity, avoid exposing the HD64F3644H to voltages beyond its specified range (typically 2.7V–5.5V). Proper decoupling capacitors should be used near the power pins to stabilize the supply. During assembly, adhere to ESD protection protocols. Debugging and programming require compatible tools like Renesas' E1 emulator or third-party JTAG interfaces. Firmware should include watchdog timers to recover from unexpected hangs.

B2B Procurement Guide

When sourcing the HD64F3644H, verify the supplier's authorization with Renesas to avoid counterfeit parts. Lead times can vary; bulk orders (1k+ units) often qualify for volume discounts. Consider alternative part numbers (e.g., HD64F3644HV) for extended temperature ranges or package options. Evaluate development support, including reference designs and software libraries, to accelerate time-to-market.