Renesas R4F24258DVFPU

Overview

R4F24258DVFPU from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2425 Group, featuring an H8S/2400 CPU core, 512 KB on-chip flash memory, 32 KB RAM, and integrated peripherals including TPU (16-bit timer pulse unit), SCI (serial communication interface), WDT (watchdog timer), and CPG (clock pulse generator). It operates at up to 33 MHz, supports 3.3 V supply, and targets industrial control and embedded automation applications requiring deterministic real-time response.

For engineers reviewing the R4F24258DVFPU datasheet, R4F24258DVFPU pinout, R4F24258DVFPU application, or R4F24258DVFPU equivalent, key selection criteria include flash endurance (10,000 write/erase cycles), operating temperature range (−40°C to +85°C), IEEE 1149.1 JTAG debug support, and compatibility with Renesas' High-Performance Embedded Workshop (HEW) toolchain.

Technical Context

The R4F24258DVFPU implements the H8S/2400 CPU architecture with 24-bit address space, 16-bit data bus, and Harvard-style memory organization. It includes a 3-stage pipeline, multiply-accumulate (MAC) unit, and 16-level priority interrupt controller supporting both maskable and non-maskable exceptions.

Peripherals are tightly coupled via the internal bus matrix: the TPU provides 8 channels of PWM and input capture with dead-time control; the SCI supports asynchronous full-duplex communication at up to 2 Mbps; and the CPG enables flexible clock source selection (main oscillator, sub-oscillator, PLL-derived clocks) with programmable prescalers and clock switching under software control.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F24257DVFPU, the R4F24258DVFPU provides double flash/RAM for larger firmware and real-time data buffers; compared with R4F24278DVFPU, it omits CAN but delivers identical timing precision and I/O performance at lower BOM cost and power consumption.

Availability

R4F24258DVFPU is available at Aetrix Electronics and suitable for industrial PLCs, motor drive controllers, building automation systems, and factory test equipment requiring stable component supply and long-term production continuity.

Supply support for R4F24258DVFPU 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 the R4F24258DVFPU - was designed for deterministic real-time control in resource-constrained industrial environments, emphasizing robust peripheral integration, debug accessibility, and long-lifecycle support.

FAQ

What is the maximum operating frequency of the R4F24258DVFPU?

The R4F24258DVFPU supports a maximum system clock frequency of 33 MHz. This is achieved using the on-chip PLL to multiply a 4–8 MHz crystal input, enabling high-speed instruction execution while maintaining timing accuracy for peripherals like the TPU and SCI. The R4F24258DVFPU maintains full functionality-including flash read/write and interrupt latency-across its entire rated frequency range.

Does the R4F24258DVFPU include a hardware watchdog timer?

Yes, the R4F24258DVFPU integrates a configurable watchdog timer (WDT) with programmable timeout intervals ranging from 1 ms to 2.1 s. It supports windowed mode to enforce strict refresh timing windows, preventing accidental or malicious disablement. The WDT is clocked independently from the main CPU clock, ensuring reliable operation even during clock faults - a key safety feature in the R4F24258DVFPU's industrial design.

Is JTAG debugging supported on the R4F24258DVFPU?

Yes, the R4F24258DVFPU fully supports IEEE 1149.1 JTAG boundary-scan and debug functionality. This enables real-time debugging, flash programming, and trace-based analysis without requiring external emulators. The R4F24258DVFPU's JTAG interface is compatible with Renesas' E1/E20 debug probes and third-party tools conforming to the standard, simplifying development and field firmware updates.

What is the flash memory endurance specification for the R4F24258DVFPU?

The R4F24258DVFPU specifies 10,000 write/erase cycles for its 512 KB on-chip flash memory, with guaranteed data retention of 20 years at 85°C. Sector erase granularity is 128 bytes, allowing fine-grained firmware updates. These values are measured and guaranteed per Renesas' qualification testing - not typical or average - and apply directly to the R4F24258DVFPU under specified voltage and temperature conditions.

What package type and pin count does the R4F24258DVFPU use?

The R4F24258DVFPU is supplied in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant and rated MSL-3. All pin functions - including VCC, VSS, XTAL/EXTAL, RESET, TPU, SCI, and GPIO - are defined in the official Renesas H8S/2425 Group hardware manual. The R4F24258DVFPU's pinout is shared across the H8S/2425 family, enabling layout reuse for derivative designs.