Renesas HD64F38024RWIV

Overview

HD64F38024RWIV from Renesas Electronics is an 8-bit single-chip microcontroller in the H8/38024 Group, built on the H8/300L CPU core and integrating 32 KB flash ROM, 1 KB RAM, 10-bit A/D converter (8 channels), LCD controller (32 seg × 4 com), and multiple timers (A/C/F/G/AEC/WDT). It operates at up to 16 MHz within 4.5–5.5 V supply and targets embedded control in industrial instrumentation and low-power display systems.

For engineers reviewing the HD64F38024RWIV datasheet, HD64F38024RWIV pinout, HD64F38024RWIV application, or HD64F38024RWIV equivalent, key selection criteria include its FP-80A package, -40°C to +85°C extended temperature grade (WTR), integrated LCD driver with static/dynamic support, and flash-based field-programmability for rapid prototyping and firmware updates.

Technical Context

The HD64F38024RWIV implements the H8/300L 8-bit CISC architecture with 24-bit address space, supporting byte/word/long-word data access and 13 addressing modes. Its on-chip peripheral set includes UART/Synchronous SCI, 10-bit PWM, and a programmable watchdog timer with reset and interrupt options.

It features a dedicated LCD controller supporting up to 128 segments via 32-segment × 4-common drive, compatible with static, 1/2, and 1/3 duty cycles. The device uses internal clock generation with external crystal or ceramic resonator support on OSC1/OSC2 pins and includes low-voltage detection (LVD) circuitry for brown-out protection.

Key Specifications

Pinout & Package

HD64F38024RWIV is housed in a 80-pin Fine Pitch Plastic (FP-80A) package with 0.5 mm pitch, 12.0 mm × 12.0 mm body size, and exposed thermal pad - optimized for compact industrial control modules requiring thermal reliability and high I/O density.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with HD64F38024RWIV, HD64F38024RHWIV sacrifices field-upgradability for lower unit cost, while R5F100LEAFB trades LCD integration for superior power efficiency and processing headroom - making HD64F38024RWIV optimal for cost-sensitive, display-centric industrial controls requiring firmware agility.

Availability

HD64F38024RWIV is available at Aetrix Electronics and suitable for industrial panel meters, PLC I/O modules, smart thermostats, and medical handheld diagnostics requiring stable component supply across long-lifecycle production programs.

Supply support for HD64F38024RWIV 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 HD64F38024RWIV belongs to the H8/38024 Group - a family of 8-bit microcontrollers designed for cost-effective, low-power embedded control with integrated peripherals including LCD drivers, A/D converters, and serial interfaces.

FAQ

What is the maximum operating frequency of the HD64F38024RWIV?

The HD64F38024RWIV operates at a maximum clock frequency of 16 MHz when supplied with 4.5–5.5 V. This frequency is supported using either an external crystal/resonator on OSC1/OSC2 pins or an external clock source applied to OSC1. Performance remains stable across the full –40°C to +85°C temperature range specified for the WTR grade.

Does the HD64F38024RWIV support in-system programming (ISP)?

Yes, the HD64F38024RWIV supports in-system programming via its on-chip flash memory. Firmware updates can be performed through the SCI interface or using Renesas' E8/E10 emulator tools without removing the device from the target board. The 32 KB flash is organized into blocks that support erase and reprogram operations under user software control.

What LCD configurations does the HD64F38024RWIV's built-in controller support?

The HD64F38024RWIV's LCD controller supports static, 1/2-duty, and 1/3-duty drive modes using its 32 segment and 4 common outputs. It generates appropriate bias voltages internally and allows software-selectable frame frequency and duty cycle - enabling direct connection to common alphanumeric or custom segment LCD glass without external bias generators or driver ICs.

Is the HD64F38024RWIV pin-compatible with other members of the H8/38024 Group?

Yes, the HD64F38024RWIV shares identical pinout and package (FP-80A) with all members of the H8/38024 Group, including HD64F38024RHWIV and HD64F38024SWIV. This allows hardware design reuse across flash, mask ROM, and PROM variants - though firmware and configuration registers must be verified for each variant's memory and peripheral differences.

What is the purpose of the LVD circuit in the HD64F38024RWIV?

The Low-Voltage Detection (LVD) circuit in the HD64F38024RWIV monitors the VCC supply and triggers a reset or interrupt when voltage drops below one of three selectable thresholds (4.3 V, 4.0 V, or 3.7 V). This prevents unreliable operation during power brown-outs and ensures safe shutdown or recovery sequences - critical for maintaining data integrity in industrial control applications using HD64F38024RWIV.