Renesas R4F24259NFPU

Overview

R4F24259NFPU from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2425 Group, featuring an H8S/2400 Series CPU core, 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 R4F24259NFPU datasheet, R4F24259NFPU pinout, R4F24259NFPU application, or R4F24259NFPU equivalent, key selection criteria include its 100-pin LQFP package, 33 MHz max CPU clock, 256 KB flash with EEPROM emulation support, dual SCI channels for serial communication, and hardware watchdog timer with windowed timeout capability.

Technical Context

The R4F24259NFPU implements the H8S/2400 CPU architecture with 24-bit address space, 16-bit data bus, and advanced mode support enabling extended register access and enhanced interrupt handling. It integrates a Clock Pulse Generator (CPG) supporting multiple clock sources - main oscillator (1–10 MHz), sub-oscillator (32.768 kHz), and internal RC oscillator - with programmable PLL for system clock synthesis.

Peripheral integration includes a 16-bit Timer Pulse Unit (TPU) with 8 channels for PWM generation and input capture, two full-duplex Serial Communication Interfaces (SCI) compliant with UART protocols, and a Watchdog Timer (WDT) with independent clock source and windowed enable/disable control. Memory protection is enforced via on-chip memory management logic for flash and RAM regions.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed pad (EP). Pin 1 marked by dot; pin numbering follows standard counter-clockwise sequence from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F24259NFPU, R4F24258NFPU reduces code storage capacity by 50% without altering real-time performance or I/O capability, while R4F24279NFPU trades one SCI for CAN 2.0B - making it unsuitable for dual-serial applications but essential for CAN-based distributed control.

Availability

R4F24259NFPU is available at Aetrix Electronics and suitable for industrial PLC modules, motor control drives, smart sensor transmitters, and embedded HMI controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for R4F24259NFPU 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 H8S/2425 Group - including R4F24259NFPU - was designed for deterministic real-time control in harsh industrial environments, emphasizing robust peripheral integration, 5 V operation, and long-lifecycle support for factory automation and instrumentation.

FAQ

What is the maximum operating frequency of the R4F24259NFPU?

The R4F24259NFPU supports a maximum CPU clock frequency of 33 MHz, achieved via internal PLL multiplication of the main oscillator input (1–10 MHz). This allows instruction execution at ≤30.3 ns per cycle, enabling tight real-time control loops. The device maintains timing compliance across its full −40 °C to +85 °C operating range and 4.5–5.5 V supply voltage window. R4F24259NFPU's CPG unit provides clock monitoring and automatic failover to backup oscillators if primary clock fails.

Does the R4F24259NFPU include on-chip flash memory with EEPROM emulation capability?

Yes, the R4F24259NFPU integrates 256 KB of on-chip flash memory qualified for 10,000 write/erase cycles, and Renesas provides official firmware libraries to emulate EEPROM functionality using designated flash sectors. This eliminates the need for external nonvolatile memory in applications requiring parameter storage, calibration data retention, or field-upgradable configuration. R4F24259NFPU's flash controller supports sector erase and byte-programming modes, with built-in error detection during write operations.

What communication interfaces are integrated into the R4F24259NFPU?

The R4F24259NFPU includes two independent Serial Communication Interfaces (SCI0 and SCI1), each supporting full-duplex UART operation with programmable baud rates, parity, stop bits, and framing. Both SCIs feature FIFO buffers, break detection, and LIN bus compatibility mode. No CAN, I²C, or SPI controllers are integrated - those functions require external components or software bit-banging. R4F24259NFPU's SCI peripherals are directly mapped to dedicated pins in its 100-pin LQFP package with no multiplexing conflicts.

What is the package type and pin count of the R4F24259NFPU?

The R4F24259NFPU is housed in a 100-pin LQFP package measuring 14 mm × 14 mm with 0.5 mm lead pitch and an exposed thermal pad. Pin 1 is marked by a dot in the top-left corner, and numbering proceeds counter-clockwise. This package supports reflow soldering per J-STD-020 and provides mechanical stability for industrial vibration environments. R4F24259NFPU's pin assignment includes eight VCC/GND pairs, dual SCI interfaces, 8-channel ADC inputs, and 16-bit TPU outputs - all electrically isolated per functional bank.

Is the R4F24259NFPU qualified for industrial temperature operation?

Yes, the R4F24259NFPU is rated for industrial temperature operation from −40 °C to +85 °C and classified by Renesas as a "Standard" quality grade device, intended for use in industrial robots, factory automation equipment, test and measurement instruments, and commercial-grade embedded systems. It undergoes extended burn-in and parametric screening per Renesas industrial qualification standards. R4F24259NFPU's electrical specifications - including timing, drive strength, and ADC accuracy - are guaranteed across this full temperature range without derating.