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Renesas R4F24253NVFPU
- Part No.:
- R4F24253NVFPU
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
R4F24253NVFPU.pdf
- Description:
- 16-BIT GENERAL MCU
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Product details
Overview
R4F24253NVFPU from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2425 Group, designed for embedded control applications requiring deterministic real-time response, integrated peripherals, and industrial-grade reliability. It features 256 KB on-chip Flash memory, 16 KB RAM, a 32 MHz max CPU clock, 8-channel 10-bit ADC, and dual SCI interfaces. Used in motor control subsystems of HVAC actuators and industrial PLC I/O modules.
For engineers reviewing the R4F24253NVFPU datasheet, R4F24253NVFPU pinout, R4F24253NVFPU application, or R4F24253NVFPU equivalent, key selection criteria include Flash endurance (10,000 write/erase cycles), operating temperature range (−40°C to +85°C), and support for H8S/2400-series instruction set compatibility - critical for legacy code migration and long-lifecycle industrial designs.
Technical Context
The R4F24253NVFPU implements the H8S/2000-compatible CPU core with 32-bit internal data paths and 24-bit addressing, enabling direct access to up to 16 MB of external memory space. It integrates a Clock Pulse Generator (CPG) supporting crystal, ceramic resonator, or external clock inputs, and includes a watchdog timer with independent reset capability.
Peripheral integration includes a 16-bit Timer Pulse Unit (TPU) with PWM output, an 8-bit timer (TMR), serial communication interfaces (SCI0/SCI1) supporting asynchronous and clock-synchronous modes, and a bus controller (BSC) for external memory expansion. All peripherals are memory-mapped and accessible via standard load/store instructions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | H8S/2000-compatible 16-bit CISC core with 32-bit ALU and 24-bit address bus - enables efficient control code execution and direct access to extended memory maps. |
| Max Operating Frequency | 32 MHz - supports real-time loop execution under 31.25 ns resolution, suitable for closed-loop motor control at ≤20 kHz PWM switching. |
| On-chip Memory | 256 KB Flash (10K erase/write cycles), 16 KB RAM - sufficient for firmware + parameter storage without external EEPROM in cost-sensitive industrial nodes. |
| Analog Peripherals | 8-channel 10-bit ADC with 1.2 μs conversion time - enables simultaneous sampling of voltage, current, and temperature feedback in motor drives. |
| Serial Interfaces | Dual SCI modules supporting UART and clock-synchronous modes - allows concurrent host communication (RS-485) and sensor interface (SPI-like timing). |
| Operating Temperature | −40°C to +85°C - qualified for use in uncontrolled industrial enclosures and outdoor-rated equipment without forced cooling. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard 3.3 V logic rails and low-noise LDO regulation schemes. |
Pinout & Package
Package: 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply and ground | Dedicated analog/digital power pins with separate AGND/DGND routing - required for ADC accuracy and noise immunity in mixed-signal operation. |
| XTAL, EXTAL | Crystal oscillator input/output | Supports 1–20 MHz crystal or ceramic resonator - enables precise timing for UART baud generation and real-time scheduling without external clock source. |
| RESET | Active-low reset input | Asynchronous, Schmitt-triggered input with internal pull-up - ensures reliable power-on and brown-out recovery without external RC network. |
| PA0–PA7 | Port A general-purpose I/O | Bi-directional with individual direction control and read-modify-write capability - used for digital I/O expansion and status LED control in compact designs. |
| AD0–AD7 | ADC input channels | Analog input pins with internal sample-and-hold - accept ±10 V signals via external resistor dividers; share pins with Port A for multiplexed use. |
| SCI0_TXD / SCI0_RXD | Serial communication interface 0 | Full-duplex UART-level signals - support RS-232/RS-485 transceivers directly; configurable for 9-bit framing and hardware flow control. |
Key Features
| Feature | Design Value |
|---|---|
| Flash memory with block protection | 256 KB user-programmable Flash with 4KB sector lock - prevents accidental overwrite of bootloader or calibration data during field firmware updates. |
| Integrated watchdog timer (WDT) | Independent 16-bit counter with selectable timeout (0.125–4096 ms) and window mode - detects software hang in safety-critical loops without CPU intervention. |
| 16-bit Timer Pulse Unit (TPU) | 8-channel PWM generator with dead-time insertion and synchronous reload - enables 3-phase inverter gate drive with precise phase alignment and shoot-through prevention. |
| Memory-mapped peripheral architecture | All registers mapped into 24-bit address space with consistent access timing - simplifies driver development and enables compiler-optimized peripheral access. |
| Low-power standby modes | Software-selectable HALT and STOP modes with wake-up on IRQ or RTC - reduces active current to <10 μA for battery-backed monitoring functions. |
Applications
| Industrial Motor Control | Building Automation Controller |
|---|---|
Use Scenario: Closed-loop speed and torque control of 3-phase BLDC motors in HVAC air handlers and pump drives. IC Role / Device Role / Timing Role: Real-time execution of FOC (Field-Oriented Control) algorithms, PWM waveform generation, and ADC-based current sensing at 20 kHz loop rate. Use Value: Integrated TPU and ADC eliminate need for external PWM generators and signal conditioners, reducing BOM count by ≥3 components per axis. |
Use Scenario: Central controller for lighting, shading, and HVAC zone management in commercial buildings using BACnet MS/TP. IC Role / Device Role / Timing Role: Protocol stack execution, multi-sensor polling (temp/humidity/motion), and relay/actuator sequencing with deterministic timing. Use Value: Dual SCI interfaces enable native BACnet MS/TP over RS-485 while maintaining local debug UART, avoiding protocol bridge ICs. |
| Programmable Logic Controller (PLC) I/O Module | Factory Floor Data Logger |
Use Scenario: Digital input/output expansion module with isolation, supporting 16-channel DI/DO and 4-channel AI in DIN-rail mount enclosure. IC Role / Device Role / Timing Role: High-speed bit manipulation for discrete I/O scanning, timestamped event capture, and cyclic redundancy-checked data framing. Use Value: Bit-addressable I/O ports and hardware CRC generator reduce scan cycle time by 35% vs. software-only implementations. |
Use Scenario: Standalone environmental monitor logging temperature, humidity, and vibration in manufacturing cells with SD card storage. IC Role / Device Role / Timing Role: Low-power periodic wake-up, sensor interface via ADC and I²C (via GPIO bit-banging), and FAT32 file system management. Use Value: STOP-mode current <10 μA extends battery life to >2 years on CR2032, eliminating scheduled maintenance for remote deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R4F24275NVFPU | 512 KB Flash, 32 KB RAM, same package and pinout - adds memory headroom for larger control algorithms and OTA update partitions. | Suitable for next-generation versions requiring firmware modularity or dual-bank secure boot. | Select when future-proofing against feature creep or needing certified secure boot infrastructure. |
| R5F524TBADFP | RX600-series 32-bit core, 100 MHz, 512 KB Flash, 64 KB RAM - higher performance but different instruction set and peripheral register map. | Requires full firmware porting; justified only when >100 DMIPS or FPU-based calculations are needed. | Choose only if migrating to Renesas RX platform for long-term roadmap alignment and enhanced security IP. |
Compared with R4F24253NVFPU, R4F24275NVFPU offers drop-in memory scalability within identical timing and I/O behavior, whereas R5F524TBADFP demands architectural rework but delivers 3× integer throughput and integrated AES acceleration for connected edge nodes.
Availability
R4F24253NVFPU is available at Aetrix Electronics and suitable for industrial motor control, building automation systems, and programmable logic controller (PLC) I/O modules requiring stable component supply across 10+ year product lifecycles.
Supply support for R4F24253NVFPU 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/2400 Series - including the R4F24253NVFPU - was engineered for deterministic real-time control in cost-sensitive industrial equipment, emphasizing peripheral integration, Flash endurance, and long-term availability over raw computational throughput.
FAQ
What is the maximum operating frequency of the R4F24253NVFPU?
The R4F24253NVFPU operates at a maximum CPU clock frequency of 32 MHz, achieved using the on-chip Clock Pulse Generator (CPG) with external crystal or resonator input. This frequency enables sub-32 ns instruction cycle times for time-critical tasks such as PWM generation and ADC sampling in motor control applications. The R4F24253NVFPU maintains full functionality across its specified voltage (3.0–3.6 V) and temperature (−40°C to +85°C) ranges at this speed.
Does the R4F24253NVFPU support in-system programming (ISP)?
Yes, the R4F24253NVFPU supports in-system programming via its on-chip Flash memory and dedicated serial interface (SCI0). Firmware updates can be performed using Renesas' Flash Development Toolkit (FDT) with standard UART-level signals, without requiring external programmers or device removal. The R4F24253NVFPU includes block-lock functionality to protect bootloader sections during field updates, ensuring system integrity.
What peripheral interfaces are integrated into the R4F24253NVFPU?
The R4F24253NVFPU integrates a 16-bit Timer Pulse Unit (TPU) with 8 PWM channels, dual Serial Communication Interfaces (SCI0/SCI1), an 8-channel 10-bit ADC, an 8-bit timer (TMR), a watchdog timer (WDT), and a bus controller (BSC) for external memory expansion. These peripherals are memory-mapped and fully accessible through the H8S/2000 instruction set, enabling tight integration in real-time control applications without external glue logic.
Is the R4F24253NVFPU pin-compatible with other H8S/2425 Group members?
Yes, the R4F24253NVFPU shares identical pin assignment and electrical characteristics with other members of the H8S/2425 Group, including R4F2425 and R4F24252. This allows direct substitution within the same 100-pin LQFP package, provided Flash size and RAM requirements align. The R4F24253NVFPU retains full functional compatibility with existing PCB layouts and firmware built for the base H8S/2425 variant.
What is the Flash endurance specification for the R4F24253NVFPU?
The R4F24253NVFPU specifies 10,000 write/erase cycles for its 256 KB on-chip Flash memory, validated under standard industrial conditions (3.3 V, 25°C). This endurance rating supports frequent field updates in applications such as HVAC calibration storage or PLC configuration changes. The R4F24253NVFPU also includes sector-lock protection to prevent unintended erasure of critical firmware segments during update operations.
R4F24253NVFPU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- -
- Core Size:
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- Speed:
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- Connectivity:
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- Peripherals:
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- Number of I/O:
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- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
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R4F24253NVFPU FAQ
1.How can I place an order for R4F24253NVFPU through Aetrix?
Please submit a Request for Quotation (RFQ) for R4F24253NVFPU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R4F24253NVFPU reliable?
The price and inventory of R4F24253NVFPU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R4F24253NVFPU is usually 5 days.
3.What payment methods are accepted for R4F24253NVFPU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R4F24253NVFPU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R4F24253NVFPU?
R4F24253NVFPU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R4F24253NVFPU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R4F24253NVFPU?
For technical support, including R4F24253NVFPU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R4F24253NVFPU requirements.
6.How does Aetrix verify that R4F24253NVFPU is sourced from the original manufacturer or authorized distributors?
All R4F24253NVFPU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R4F24253NVFPU meets industry standards.
7.What is the process for return or replacement of R4F24253NVFPU?
All R4F24253NVFPU units undergo pre-shipment inspection (PSI). If there is an issue with R4F24253NVFPU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R4F24253NVFPU part is unused and in its original packaging.
Return procedure for R4F24253NVFPU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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