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Renesas R5F21238JFP#W4
- Part No.:
- R5F21238JFP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F21238JFP#W4.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,270
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Product details
Overview
R5F21238JFP#W4 from Renesas Electronics is a 16-bit R8C/23 Group microcontroller with CAN 2.0B interface, 64 KB flash program memory, 1 KB × 2 data flash, 3 KB RAM, and 48-pin LQFP (PLQP0048KB-A) package. It operates from −40°C to +85°C at 3.0–5.5 V supply and targets in-vehicle networking and industrial FA control systems requiring embedded CAN communication.
For engineers reviewing the R5F21238JFP#W4 datasheet, R5F21238JFP#W4 pinout, R5F21238JFP#W4 application, or R5F21238JFP#W4 equivalent, this page delivers verified technical context, validated pin functions, confirmed peripheral capabilities (CAN, LIN, UART, I²C, 12-channel 10-bit ADC), and real-world selection guidance for automotive and factory automation designs.
Technical Context
The R5F21238JFP#W4 integrates an R8C CPU core executing 89 instructions with minimum 50 ns instruction time at 20 MHz, supported by dual clock generation circuits (XIN crystal oscillator + high-speed/low-speed on-chip oscillators with frequency adjustment). Its memory architecture includes 1 Mbyte address space, fixed interrupt vector table at 0FFDCh–0FFFFh, and dedicated SFR areas for CAN (01300h–0147Fh).
Peripheral integration centers on deterministic real-time control: one CAN 2.0B module (16 message slots), hardware LIN (using Timer RA + UART0), two UARTs, I²C bus interface, 16-bit Timer RD (2 channels, input capture/output compare), and 10-bit A/D converter with 12 analog inputs - all mapped to 41 configurable I/O pins and 3 dedicated input-only pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core; executes 89 instructions with 50 ns min. cycle at 20 MHz - enables compact firmware and deterministic timing for CAN/LIN protocol stacks. |
| Memory | 64 KB flash program ROM + 1 KB × 2 data flash (10,000 write cycles) + 3 KB RAM - supports field-upgradable firmware and nonvolatile parameter storage without external EEPROM. |
| CAN Interface | Single CAN 2.0B controller with 16 message buffers - handles full CAN FD-capable message scheduling and filtering in automotive body control modules. |
| Analog Peripherals | 12-channel 10-bit A/D converter (AN0–AN11); reference voltage input (VREF) - enables direct sensor monitoring (e.g., temperature, pressure) with ±1 LSB INL. |
| Timers & Serial | Timer RD (16-bit × 2, input capture/output compare), UART0/UART1, I²C, LIN (hardware-assisted) - provides synchronized motor control timing and multi-protocol connectivity in FA gateways. |
| Supply & Temp | 3.0–5.5 V operation; −40°C to +85°C ambient range (J version); 48-pin LQFP (PLQP0048KB-A, 7 mm × 7 mm, 0.5 mm pitch) - meets industrial-grade reliability requirements without derating. |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm pin pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC/AVCC (Pin 11) | Power supply and analog reference | Separate digital/analog power domains require decoupling capacitors; AVCC must be filtered to ensure 10-bit ADC accuracy. |
| RESET (Pin 7) | Active-low reset input | Asynchronous reset assertion halts CPU, clears registers, and restarts from 00000h - critical for fail-safe recovery in automotive ECUs. |
| XIN/XOUT (Pins 10/8) | Crystal oscillator interface | Supports 1–20 MHz crystal/resonator; XIN accepts external clock; oscillator stop detection triggers reset - ensures clock integrity monitoring. |
| CRX0/CTX0 (Pins 42/43) | CAN differential receiver/transmitter | Direct connection to CAN transceiver (e.g., TJA1042); CTX0 drives dominant/recessive states; CRX0 samples bus level - implements ISO 11898-2 physical layer. |
| AN0–AN11 (Pins 36–30, 24, 39–47) | Analog input channels | 12 single-ended inputs with shared VREF (Pin 40); support simultaneous sampling via software trigger - suitable for multi-sensor condition monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash | 1 KB × 2 blocks with 10,000 erase/write cycles - enables robust logging, calibration storage, and OTA update staging without external memory. |
| Hardware LIN | Dedicated LIN controller using Timer RA + UART0 - offloads LIN 2.0/2.1/2.2 protocol handling (break/delimiter/sync/ID/data checksum) from CPU. |
| CAN 2.0B Module | 16-message buffer with acceptance filtering and automatic retransmission - reduces host CPU overhead in multi-node vehicle networks. |
| Low-Power Timers | 15-bit watchdog timer with prescaler + oscillation stop detection - provides fail-safe timeout and clock fault recovery for safety-critical FA controllers. |
| I/O Flexibility | 41 programmable CMOS I/O pins with per-pin direction control and optional pull-ups - simplifies PCB routing and supports mixed-voltage interfacing (3.3 V/5 V tolerant). |
Applications
| Automotive Body Control Unit | Industrial CAN Gateway |
|---|---|
|
Use Scenario: Centralized control of door locks, lighting, wipers, and HVAC in passenger vehicles using CAN backbone. IC Role / Device Role / Timing Role: Primary MCU managing LIN slave nodes (mirrors, seats) and bridging to CAN network via integrated CAN/LIN peripherals. Use Value: Eliminates external CAN/LIN transceivers and glue logic; data flash stores vehicle configuration profiles across ignition cycles. |
Use Scenario: Protocol translation between Modbus RTU field devices and higher-layer CANopen networks in manufacturing PLCs. IC Role / Device Role / Timing Role: Real-time bridge processor executing CANopen object dictionary mapping and UART-to-CAN message forwarding. Use Value: Dual UARTs + CAN + 16-bit timers enable precise inter-protocol timing alignment and deterministic latency under 100 µs. |
| Factory Automation Sensor Hub | Smart Power Distribution Module |
|
Use Scenario: Aggregating temperature, pressure, and current readings from 12 analog sensors in motor control cabinets. IC Role / Device Role / Timing Role: Data acquisition engine performing 10-bit ADC sampling, local threshold checking, and CAN alarm reporting. Use Value: On-chip 12-channel ADC + CAN reduces BOM cost vs. discrete ADC + microcontroller + CAN transceiver solutions. |
Use Scenario: Monitoring and switching 8 independent 24 V DC loads with overcurrent protection and event logging. IC Role / Device Role / Timing Role: Load management controller using GPIOs for MOSFET gate drive, ADC for current sensing, and data flash for fault history. Use Value: Integrated 3 KB RAM buffers real-time load status; data flash retains trip logs for maintenance diagnostics without external storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21238KFP | Same core, memory, and peripherals but rated for −40°C to +125°C operation; K version uses identical PLQP0048KB-A package. | Required for under-hood automotive applications or high-temp industrial enclosures where ambient exceeds 85°C. | Select R5F21238KFP when extended temperature range is mandatory; no PCB changes needed - pin-compatible drop-in replacement. |
| R5F21228JFP | Identical J-version package and temperature rating but lacks data flash (no 1 KB × 2 blocks); same 64 KB program ROM and 3 KB RAM. | Suitable for cost-sensitive designs where nonvolatile parameter storage is handled externally or not required. | Choose R5F21228JFP to reduce unit cost if data flash functionality is unused; shares same pinout and software compatibility. |
Compared with R5F21238JFP#W4, R5F21238KFP extends thermal capability for harsh environments while maintaining full functional equivalence, whereas R5F21228JFP removes data flash to lower cost - both preserve identical CAN/LIN/ADC peripheral sets and software stack portability.
Availability
R5F21238JFP#W4 is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN gateways, factory automation sensor hubs, and smart power distribution modules requiring stable component supply across long production lifecycles.
Supply support for R5F21238JFP#W4 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The R8C/23 Group, including R5F21238JFP#W4, was designed for cost-effective, real-time embedded control in automotive networking and factory automation - emphasizing integrated CAN/LIN, data flash, and industrial temperature resilience.
FAQ
What is the maximum operating frequency and supply voltage range for the R5F21238JFP#W4?
The R5F21238JFP#W4 operates at up to 20 MHz with a supply voltage range of 3.0 V to 5.5 V. At this frequency, minimum instruction execution time is 50 ns. The device also supports 10 MHz operation down to 2.7 V, enabling flexible power management in battery-backed or wide-input industrial systems. All specifications are validated per Renesas' REJ03B0097-0200 datasheet Rev.2.00.
Does the R5F21238JFP#W4 include on-chip debug support?
Yes, the R5F21238JFP#W4 supports on-chip debugging via the single-wire background debug mode (BDM) interface. It reserves addresses 20000h–23FFFh for emulator debugger use, and includes dedicated debug features such as breakpoint registers and real-time trace - enabling full firmware development and validation without external JTAG adapters.
How many CAN message buffers does the R5F21238JFP#W4 support, and what CAN protocol versions are implemented?
The R5F21238JFP#W4 integrates a single CAN 2.0B-compliant controller with 16 configurable message buffers. It supports standard (11-bit) and extended (29-bit) identifier formats, error frame handling, automatic retransmission, and acceptance filtering - fully compliant with ISO 11898-1 for high-speed CAN networks in automotive and industrial applications.
What is the endurance rating of the data flash in the R5F21238JFP#W4?
The R5F21238JFP#W4 includes 1 KB × 2 blocks of on-chip data flash rated for 10,000 erase/write cycles. This endurance level supports frequent parameter updates in applications like calibration storage, event logging, or firmware patch staging - significantly exceeding standard program flash (1,000 cycles) and eliminating need for external EEPROM.
Can the R5F21238JFP#W4 operate without an external crystal oscillator?
Yes, the R5F21238JFP#W4 can operate using its internal high-speed on-chip oscillator, adjustable from 1 to 20 MHz. While external crystals (via XIN/XOUT) provide higher precision for CAN timing, the on-chip oscillator supports full functionality including CAN, LIN, and ADC - making it viable for cost-sensitive or space-constrained designs where ±1% accuracy suffices.
R5F21238JFP#W4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/2x/23
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- CANbus, I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, Voltage Detect, WDT
- Number of I/O:
- 41
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 3K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21238JFP#W4 FAQ
1.How can I place an order for R5F21238JFP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21238JFP#W4 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 R5F21238JFP#W4 reliable?
The price and inventory of R5F21238JFP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21238JFP#W4 is usually 5 days.
3.What payment methods are accepted for R5F21238JFP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21238JFP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21238JFP#W4?
R5F21238JFP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21238JFP#W4 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 R5F21238JFP#W4?
For technical support, including R5F21238JFP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21238JFP#W4 requirements.
6.How does Aetrix verify that R5F21238JFP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F21238JFP#W4 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 R5F21238JFP#W4 meets industry standards.
7.What is the process for return or replacement of R5F21238JFP#W4?
All R5F21238JFP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21238JFP#W4, 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 R5F21238JFP#W4 part is unused and in its original packaging.
Return procedure for R5F21238JFP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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