Renesas R4F24249DFAU

Overview

R4F24249DFAU from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2424 Group, featuring 256 KB on-chip Flash memory, 16 KB RAM, and integrated peripherals including TPU, SCI, WDT, and CPG. It operates at up to 33 MHz, supports 5 V operation, and targets industrial control and embedded instrumentation applications requiring deterministic real-time response.

For engineers reviewing the R4F24249DFAU datasheet, R4F24249DFAU pinout, R4F24249DFAU application, or R4F24249DFAU equivalent, this page provides verified technical context, package mapping, functional specifications, and validated alternative options for design-in and supply continuity planning.

Technical Context

The R4F24249DFAU implements the H8S/2400 Series CPU core with advanced mode support, 24-bit address space, and Harvard-style memory architecture. It integrates a Clock Pulse Generator (CPG) supporting internal oscillators, external crystal, and PLL-based clock synthesis, enabling flexible system timing configurations.

Peripheral integration includes a 16-bit Timer Pulse Unit (TPU) with input capture/output compare, two asynchronous Serial Communication Interfaces (SCI), a Watchdog Timer (WDT) with windowed operation, and a Bus State Controller (BSC) for external memory expansion - all accessible via dedicated SFRs and interrupt vectors mapped in the exception vector table.

Key Specifications

Pinout & Package

The R4F24249DFAU is housed in a 112-pin LQFP (16 mm × 16 mm, 0.4 mm pitch) package with exposed thermal pad, compliant with JEDEC MO-152AC. Pin assignments are defined across four operating modes (Mode 1–4), with primary I/O, power, clock, reset, and debug interface signals assigned per hardware manual Rev.5.00.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F24249DFAU, the R4F24248DFAU offers cost reduction through memory downscaling without sacrificing peripheral functionality, while the R4F24249DFBZ delivers identical electrical behavior in a compact BGA form factor - both require no firmware or schematic changes but differ in layout, thermal, and procurement considerations.

Availability

R4F24249DFAU is available at Aetrix Electronics and suitable for industrial automation, embedded instrumentation, and motor control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R4F24249DFAU 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 headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The H8S/2424 Group, including R4F24249DFAU, was designed for deterministic real-time control in harsh industrial environments - emphasizing robust I/O, precise timing, and long-lifecycle support over consumer-grade feature bloat.

FAQ

What is the maximum operating frequency of the R4F24249DFAU?

The R4F24249DFAU operates at a maximum frequency of 33 MHz when supplied with 4.5 V to 5.5 V and using the internal PLL with an external crystal source. This frequency is confirmed in the H8S/2424 Group User's Manual Rev.5.00, Section 1.1.2, and defines the upper limit for instruction throughput and peripheral timing resolution. The R4F24249DFAU achieves consistent cycle timing across its entire operating temperature range.

Does the R4F24249DFAU support in-system programming (ISP)?

Yes, the R4F24249DFAU supports in-system programming via its on-chip debug interface (OCDS) and boot ROM routines. Firmware updates can be performed without removing the device from the target board, using standard UART or dedicated debug pins. The R4F24249DFAU's Flash memory allows sector erase and byte/word programming, enabling field upgrades while preserving configuration data in protected sectors.

What package type is used for the R4F24249DFAU?

The R4F24249DFAU is packaged in a 112-pin LQFP (16 mm × 16 mm, 0.4 mm pitch) with exposed thermal pad, designated as "DFAU" in Renesas' ordering nomenclature. This package is fully documented in the H8S/2424 Group User's Manual Rev.5.00, Section 1.4.1, and supports standard surface-mount assembly processes. The R4F24249DFAU's pinout is shared across the H8S/2424 family variants, ensuring layout compatibility.

How many interrupt vectors does the R4F24249DFAU support?

The R4F24249DFAU supports 64 interrupt vectors, including 16 external IRQ lines, multiple internal peripheral sources (TPU, SCI, WDT, DMAC), and system exceptions (reset, trap, illegal instruction). Vector allocation and priority are managed by the Interrupt Controller (INT) with IPRA–IPRN registers. This structure allows the R4F24249DFAU to handle complex real-time event sequences with minimal latency and deterministic response.

Is the R4F24249DFAU qualified for automotive applications?

No, the R4F24249DFAU is classified by Renesas as a Standard-grade product intended for industrial, office, and communications equipment - not for automotive or safety-critical transportation systems. Its qualification excludes AEC-Q100 stress testing and fails to meet the High Quality grade requirements outlined in the User's Manual Section 5. The R4F24249DFAU is appropriate for non-safety industrial use but must not be deployed in automotive ECUs or ADAS subsystems without additional validation.