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Renesas R4F20234NFD#U0
- Part No.:
- R4F20234NFD#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
R4F20234NFD#U0.pdf
- Description:
- 4-8BIT GENERAL MCU H/300H TINY
- Quantity:
- Payment:
- Shipping:
Inventory:1,555
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Product details
Overview
R4F20234NFD#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny series, designed for embedded control applications requiring integrated peripherals and low-power operation. It features 128 KB on-chip flash memory, 8 KB RAM, a 32 MHz max CPU clock, 57 I/O pins, and supports CAN 2.0B interface via dedicated controller. It is used in industrial motor control systems where deterministic real-time response and peripheral integration are critical.
For engineers reviewing the R4F20234NFD#U0 datasheet, R4F20234NFD#U0 pinout, R4F20234NFD#U0 application, or R4F20234NFD#U0 equivalent, key selection criteria include its H8S/20235 group compatibility, 32 MHz operation with internal PLL, CAN 2.0B support, 128 KB flash endurance (10k write/erase cycles), and industrial temperature range (–40°C to +85°C) compliance.
Technical Context
The R4F20234NFD#U0 implements the H8S/2000 CPU core with 16-bit data bus and 24-bit address space, supporting advanced mode operation with 32-bit register extensions. It integrates a programmable clock pulse generator (CPG) with PLL, low-voltage detection (LVD), and on-chip debug support via JTAG interface.
Peripheral integration includes one CAN controller (CAN 2.0B compliant), three serial communication interfaces (SCI), 16-bit timer/counters with compare match and input capture, 10-bit ADC with 16 channels, and an event link controller (ELC) for hardware-triggered DMA transfers without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | H8S/2000 16-bit RISC core with 32-bit register extension support in Advanced Mode |
| Max Operating Frequency | 32 MHz - enables real-time control loop execution at ≤31.25 ns instruction cycle time |
| On-Chip Memory | 128 KB flash (10k erase/write cycles) + 8 KB RAM - sufficient for standalone firmware with bootloader and parameter storage |
| I/O Pins | 57 general-purpose CMOS I/O pins - supports multiplexed peripheral functions including CAN TX/RX, SCI, ADC, and PWM outputs |
| CAN Interface | Dedicated CAN 2.0B controller with 32 message buffers - handles arbitration, error handling, and automatic retransmission without CPU load |
| ADC Resolution | 10-bit successive approximation ADC with 16 input channels - provides ±1 LSB INL for sensor signal digitization in motor current/voltage feedback |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
Package: 80-pin LQFP (12 mm × 12 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply and ground | Dual 5 V supply domains: VCC for I/O and analog circuits, VSS as common reference; decoupling required per Renesas layout guidelines |
| XTAL, EXTAL | Crystal oscillator inputs | Supports 1–20 MHz external crystal; internal oscillator circuit enables stable clock generation for CAN timing and UART baud rate accuracy |
| CAN_TX, CAN_RX | CAN physical layer interface | Differential transmit/receive signals compliant with ISO 11898-1; require external transceiver (e.g., TJA1042) for bus connection |
| AD0–AD15 | Analog input channels | 16-channel 10-bit ADC inputs; AD0–AD7 support simultaneous sampling when triggered by ELC events |
| PA0–PA15, PB0–PB15, etc. | Multiplexed GPIO | 57 total I/O pins configurable as digital input/output, SCI, PWM, or timer capture - pin function selected via PMC registers at runtime |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0B Controller | Hardware-accelerated message filtering, transmission queueing, and error confinement - eliminates software polling overhead in distributed control networks |
| Event Link Controller (ELC) | Enables autonomous peripheral triggering (e.g., ADC conversion start on timer match) - reduces interrupt latency and CPU utilization in closed-loop systems |
| Low-Voltage Detection (LVD) | Configurable trip points (4.0 V / 3.5 V / 3.0 V) with interrupt or reset output - ensures safe shutdown during brown-out conditions in motor drive applications |
| On-Chip Debug Support | JTAG interface with full breakpoint and watchpoint capability - enables non-intrusive real-time debugging of time-critical ISR code without halting CAN traffic |
| Flash Memory Security | On-chip flash protection via lock bits and read-out prevention - prevents unauthorized firmware extraction in deployed industrial controllers |
Applications
| Industrial Motor Drive Control | Building Automation Node |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in HVAC blowers and pumps using sensorless FOC algorithms. IC Role / Device Role / Timing Role: Primary MCU executing motor control firmware, managing PWM generation, ADC sampling, and CAN-based command reception from central BMS. Use Value: Integrated CAN 2.0B and ELC reduce external component count and ensure sub-10 µs ADC-to-PWM latency for torque ripple suppression. | Use Scenario: Distributed environmental monitoring node aggregating temperature, humidity, and CO₂ sensor data in commercial HVAC systems. IC Role / Device Role / Timing Role: Sensor hub MCU with 10-bit ADC, SCI for local RS-485 communication, and CAN for backbone network reporting. Use Value: 128 KB flash accommodates dual-bank firmware updates over CAN, while LVD ensures graceful shutdown during power dips in unregulated building wiring. |
| Programmable Logic Controller (PLC) I/O Module | Factory Floor Safety Interlock |
Use Scenario: Digital I/O expansion module for modular PLC systems, handling 32-channel discrete input/output with diagnostics. IC Role / Device Role / Timing Role: Peripheral controller interfacing with optocoupled I/O banks, communicating status and commands via CANopen protocol stack. Use Value: 57 GPIO pins support direct connection to isolation drivers; CAN controller's message buffering prevents packet loss under high scan-rate cyclic communication. | Use Scenario: Emergency stop coordination unit monitoring door switches, light curtains, and e-stop buttons across multiple machine zones. IC Role / Device Role / Timing Role: Safety-critical monitor MCU performing cross-checking of redundant inputs and issuing fail-safe outputs via dedicated safety GPIOs. Use Value: On-chip LVD and watchdog timer with windowed mode provide independent fault detection layers meeting SIL2 requirements per IEC 61508. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R4F20235NFD#U0 | Same package and pinout; adds 16 KB data flash for EEPROM emulation and enhanced CAN FIFO depth | Better suited for applications requiring field-upgradable calibration tables or extended CAN message buffering | Select R4F20235NFD#U0 if persistent parameter storage or higher CAN throughput is required; otherwise R4F20234NFD#U0 offers optimal cost/performance balance |
| R5F566TEADFP | 32-bit RX66T core, 100 MHz, 512 KB flash, integrated encoder interface - not pin-compatible | Targets high-performance servo drives needing >100 kSPS ADC sampling and complex motion profiling | Choose R5F566TEADFP only when migrating to 32-bit performance and advanced motor control IP; R4F20234NFD#U0 remains appropriate for cost-sensitive, deterministic 16-bit control |
Compared with R4F20235NFD#U0, the R4F20234NFD#U0 trades data flash and extended CAN buffer for lower unit cost and identical footprint; versus R5F566TEADFP, it delivers proven 16-bit determinism and simpler toolchain integration at lower power and BOM cost for established industrial designs.
Availability
R4F20234NFD#U0 is available at Aetrix Electronics and suitable for industrial motor control, building automation nodes, PLC I/O modules, and factory floor safety interlocks requiring stable component supply across multi-year production cycles.
Supply support for R4F20234NFD#U0 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 manufacturer headquartered in Japan, specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The H8S/Tiny series, including the R4F20234NFD#U0, was designed for cost-effective, high-reliability embedded control in industrial equipment where deterministic real-time response and peripheral integration outweigh raw processing power.
FAQ
What is the maximum operating frequency of the R4F20234NFD#U0?
The R4F20234NFD#U0 operates at a maximum CPU clock frequency of 32 MHz, achieved using the on-chip PLL with an external crystal (1–20 MHz) or internal oscillator. This frequency enables instruction execution at 31.25 ns per cycle in standard mode, supporting tight real-time control loops in motor drive and automation applications. The R4F20234NFD#U0 maintains timing integrity across its full industrial temperature range (–40°C to +85°C).
Does the R4F20234NFD#U0 include a CAN controller, and what version does it support?
Yes, the R4F20234NFD#U0 integrates a dedicated CAN controller compliant with the CAN 2.0B specification, supporting both standard (11-bit) and extended (29-bit) identifier frames. It includes 32 message buffers with hardware-based acceptance filtering and automatic retransmission on error. The R4F20234NFD#U0 requires an external CAN transceiver (e.g., TJA1042) for physical layer connection but handles all protocol-level tasks autonomously.
How much on-chip memory does the R4F20234NFD#U0 provide, and what are its endurance characteristics?
The R4F20234NFD#U0 includes 128 KB of on-chip flash memory and 8 KB of RAM. The flash memory is rated for 10,000 write/erase cycles and retains data for 20 years at +85°C. It supports in-application programming (IAP) and sector protection, enabling secure firmware updates and parameter storage. The R4F20234NFD#U0 does not include data flash; persistent variable storage requires external EEPROM or use of protected flash sectors.
What debug interface does the R4F20234NFD#U0 support, and is it compatible with standard tools?
The R4F20234NFD#U0 supports JTAG-based on-chip debugging, fully compatible with Renesas E2 emulator and third-party debuggers supporting the H8S/2000 architecture. It provides full visibility into CPU registers, memory, and peripheral registers, along with hardware breakpoints and watchpoints. The R4F20234NFD#U0 debug interface operates independently of the CAN or SCI peripherals, allowing real-time observation of time-critical ISRs without disrupting communication traffic.
Is the R4F20234NFD#U0 qualified for industrial temperature operation, and what packaging does it use?
Yes, the R4F20234NFD#U0 is qualified for industrial temperature operation from –40°C to +85°C and is packaged in an 80-pin LQFP (12 mm × 12 mm, 0.5 mm pitch) with RoHS-compliant lead finish. This package supports automated SMT assembly and provides thermal performance suitable for convection-cooled industrial enclosures. The R4F20234NFD#U0 meets Renesas' "Standard" quality grade, intended for industrial robots, factory automation, and commercial equipment applications.
R4F20234NFD#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-LQFP
- Series:
- H8® H8S/Tiny
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- H8S/2000
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SSU, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 69
- Program Memory Size:
- 192KB (192K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 12K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 16x10b SAR; D/A 2x8b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R4F20234NFD#U0 FAQ
1.How can I place an order for R4F20234NFD#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R4F20234NFD#U0 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 R4F20234NFD#U0 reliable?
The price and inventory of R4F20234NFD#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R4F20234NFD#U0 is usually 5 days.
3.What payment methods are accepted for R4F20234NFD#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R4F20234NFD#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R4F20234NFD#U0?
R4F20234NFD#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R4F20234NFD#U0 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 R4F20234NFD#U0?
For technical support, including R4F20234NFD#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R4F20234NFD#U0 requirements.
6.How does Aetrix verify that R4F20234NFD#U0 is sourced from the original manufacturer or authorized distributors?
All R4F20234NFD#U0 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 R4F20234NFD#U0 meets industry standards.
7.What is the process for return or replacement of R4F20234NFD#U0?
All R4F20234NFD#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R4F20234NFD#U0, 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 R4F20234NFD#U0 part is unused and in its original packaging.
Return procedure for R4F20234NFD#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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