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Renesas R5F21228KFP#U1
- Part No.:
- R5F21228KFP#U1
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F21228KFP#U1.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,123
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Product details
Overview
R5F21228KFP#U1 from Renesas Electronics is a 16-bit R8C/22 Group microcontroller with 64 KB flash ROM, 3 KB RAM, and a 48-pin LQFP package. It integrates a CAN 2.0B module (16-slot), 10-bit 12-channel ADC, UART0/UART1, I²C, LIN, and multiple timers (RA/RB/RD/RE) for automotive and industrial networking applications.
For engineers reviewing the R5F21228KFP#U1 datasheet, R5F21228KFP#U1 pinout, R5F21228KFP#U1 application, or R5F21228KFP#U1 equivalent, this MCU supports -40°C to +125°C operation, high-speed on-chip oscillator with frequency adjustment, and single-chip execution in 1 Mbyte address space - critical for under-hood automotive control and factory automation nodes.
Technical Context
The R5F21228KFP#U1 implements the R8C CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). Its memory map allocates program ROM starting at 04000h, internal RAM from 00400h, and fixed interrupt vectors at 0FFDCh–0FFFFh.
Peripheral integration includes dual UARTs (one shared with LIN hardware), two I²C interfaces, CAN controller with dedicated SFR area (01300h–0147Fh), and Timer RD with input capture/output compare on 16-bit dual channels - all accessible via 41 general-purpose I/O pins and 3 dedicated input-only ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with register bank switching and 20-bit PC/INTB |
| Flash ROM | 64 KB program memory, 1,000 erase/write cycles, VCC = 2.7–5.5 V programming |
| RAM | 3 KB on-chip SRAM used for data storage, subroutine stacks, and interrupt handling |
| CAN Interface | Single CAN 2.0B-compliant controller with 16 message buffers and dedicated SFR region |
| A/D Converter | 10-bit successive-approximation ADC with 12 analog inputs and internal reference support |
| Operating Temp | -40°C to +125°C (K version), qualified for under-hood automotive and industrial environments |
| Package | 48-pin LQFP (PLQP0048KB-A), 0.5 mm pitch, 7 mm × 7 mm body |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 0.5 mm pin pitch, 7 mm × 7 mm body, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Analog Input / I/O Port | 12-channel ADC inputs (AN0–AN7) and general-purpose CMOS I/O with programmable pull-up |
| P1_0–P1_7 | Key Input / Serial I/O | KI0–KI3 key interrupt inputs; TXD0/RXD0 for UART0; CLK0 for synchronous serial clock |
| P2_0–P2_7 | Timer RD I/O | TRDIOA0–TRDIOD1 and TRDCLK for 16-bit timer input capture/output compare functions |
| P3_0, P3_1 | Timer RA/B Output | TRAO and TRBO outputs for 8-bit timer waveform generation |
| P4_2 | VREF Input | External reference voltage input for A/D converter precision scaling |
| P4_6/P4_7 | XIN/XOUT | Crystal/resonator interface for main system clock generation (20 MHz max) |
| P6_1/P6_2 | CTX0/CRX0 | Dedicated CAN transmit and receive pins, electrically isolated from other I/O |
| RESET | Active-Low Reset | Asynchronous reset input requiring external pull-up; initiates hardware reset sequence |
Key Features
| Feature | Design Value |
|---|---|
| CAN 2.0B Module | Hardware-accelerated CAN controller with 16 message slots and dedicated SFR memory mapping (01300h–0147Fh) |
| High-Speed On-Chip Oscillator | Adjustable internal clock source eliminating external crystal for cost-sensitive designs while maintaining ±2% stability |
| Hardware LIN Support | Integrated LIN 2.0 physical layer using Timer RA and UART0 - no firmware bit-banging required |
| Data Retention at High Temp | Guaranteed operation up to +125°C ambient, validated for engine control unit (ECU) mounting locations |
| Emulator Debug Support | Dedicated debug address range (20000h–23FFFh) reserved for Renesas E8/E10 emulator compatibility |
Applications
| Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and oxygen sensor signals in gasoline/diesel powertrain systems. IC Role / Device Role / Timing Role: Primary control MCU executing closed-loop fuel injection timing, spark advance, and CAN-based diagnostic communication. Use Value: 10-bit ADC with 12 channels enables simultaneous sampling of critical analog sensors; CAN 2.0B ensures deterministic messaging with other ECUs and gateways. | Use Scenario: Distributed I/O node collecting digital inputs (limit switches, safety relays) and analog process variables (4–20 mA loops, temperature transmitters). IC Role / Device Role / Timing Role: Local intelligence unit performing signal conditioning, protocol translation (Modbus RTU over UART), and CANopen network interfacing. Use Value: -40°C to +125°C rating allows direct mounting near motors/drives; UART1 + I²C supports legacy fieldbus and local sensor connectivity. |
| Body Control Module (BCM) | Automotive Lighting Controller |
Use Scenario: Centralized management of door locks, window lifts, interior lighting, and HVAC fan speed in passenger vehicles. IC Role / Device Role / Timing Role: System coordinator communicating via CAN with gateway and executing LIN slave protocols for mirror/window actuators. Use Value: Hardware LIN module reduces CPU load by >90% vs software emulation; 41 GPIOs support direct drive of relays and LED indicators. | Use Scenario: Adaptive headlight control with dynamic beam shaping, automatic high-beam assist, and LED thermal management. IC Role / Device Role / Timing Role: Safety-critical lighting controller implementing PWM dimming, fault detection, and CAN-based diagnostics per ISO 11898. Use Value: Watchdog timer with prescaler and oscillation stop detection prevents runaway code during transient EMI events; 15-bit WDT provides extended timeout flexibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21228JFP#U0 | Same core, peripherals, and memory; rated for -40°C to +85°C only | Suitable for cabin-mounted modules (e.g., infotainment, HVAC control) but not under-hood use | Select when ambient temperature stays below 85°C and cost optimization is prioritized |
| R5F21238KFP#U0 | Adds 2×1 KB data flash (10,000-cycle endurance); identical K-version temp rating and pinout | Enables field firmware updates and parameter storage without external EEPROM | Choose when nonvolatile data logging or bootloader functionality is required |
Compared with R5F21228JFP#U0, the R5F21228KFP#U1 offers extended temperature capability essential for powertrain placement; versus R5F21238KFP#U0, it trades data flash for lower cost and simpler firmware architecture where parameter persistence isn't needed.
Availability
R5F21228KFP#U1 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F21228KFP#U1 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/22 Group, including R5F21228KFP#U1, was designed for cost-sensitive, high-reliability embedded control in automotive networking and factory automation - emphasizing CAN/LIN integration, extended temperature operation, and robust debug infrastructure.
FAQ
What is the maximum operating frequency of the R5F21228KFP#U1?
The R5F21228KFP#U1 supports a maximum external crystal frequency of 20 MHz on the XIN/XOUT pins, enabling a minimum instruction execution time of 50 ns at VCC = 3.0–5.5 V. Its high-speed on-chip oscillator also operates up to 20 MHz with adjustable frequency trimming, providing flexibility for noise-sensitive environments where external crystals are undesirable. The R5F21228KFP#U1 maintains full functionality across its specified -40°C to +125°C range at this speed.
Does the R5F21228KFP#U1 include a hardware CAN controller?
Yes, the R5F21228KFP#U1 integrates a fully compliant CAN 2.0B controller with 16 message buffers, dedicated SFR address space (01300h–0147Fh), and independent CTX0/CRX0 pins. It supports bit rates up to 1 Mbps and includes automatic retransmission, error confinement, and acceptance filtering - all handled in hardware without CPU intervention. This makes the R5F21228KFP#U1 suitable for real-time automotive and industrial networks where deterministic latency is critical.
What is the difference between R5F21228KFP#U1 and R5F21238KFP#U0?
The R5F21228KFP#U1 belongs to the R8C/22 Group and contains 64 KB program flash only, while R5F21238KFP#U0 is an R8C/23 Group device with identical program flash (64 KB) plus 2×1 KB data flash blocks rated for 10,000 erase/write cycles. Both share the same 48-pin LQFP package, -40°C to +125°C rating, and peripheral set. The R5F21228KFP#U1 is selected when data retention requirements are met by external EEPROM or SRAM, simplifying firmware and reducing BOM cost.
Can the R5F21228KFP#U1 operate without an external crystal?
Yes, the R5F21228KFP#U1 includes a high-speed on-chip oscillator that can serve as the main system clock without requiring an external crystal or resonator. This oscillator supports frequencies up to 20 MHz and features software-adjustable frequency trimming for accuracy calibration. It is especially useful in cost-constrained or EMI-sensitive designs. However, for applications demanding highest timing precision (e.g., CAN bit timing at 1 Mbps), an external crystal on XIN/XOUT is recommended. The R5F21228KFP#U1 supports seamless switching between clock sources.
Is the R5F21228KFP#U1 pin-compatible with other R8C/22 Group MCUs?
Yes, all R8C/22 Group devices in the FP (48-pin LQFP) package - including R5F21226KFP#U0, R5F21227KFP#U0, and R5F21228KFP#U1 - share identical pin assignments, electrical characteristics, and package dimensions (PLQP0048KB-A). Memory size (32/48/64 KB) and RAM capacity (2/2.5/3 KB) vary across the family, but PCB layout, power delivery, and peripheral routing remain fully interchangeable. This enables scalable design reuse across performance tiers within the same hardware platform.
R5F21228KFP#U1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/2x/22
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- 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:
- -
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21228KFP#U1 FAQ
1.How can I place an order for R5F21228KFP#U1 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21228KFP#U1 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 R5F21228KFP#U1 reliable?
The price and inventory of R5F21228KFP#U1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21228KFP#U1 is usually 5 days.
3.What payment methods are accepted for R5F21228KFP#U1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21228KFP#U1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21228KFP#U1?
R5F21228KFP#U1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21228KFP#U1 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 R5F21228KFP#U1?
For technical support, including R5F21228KFP#U1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21228KFP#U1 requirements.
6.How does Aetrix verify that R5F21228KFP#U1 is sourced from the original manufacturer or authorized distributors?
All R5F21228KFP#U1 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 R5F21228KFP#U1 meets industry standards.
7.What is the process for return or replacement of R5F21228KFP#U1?
All R5F21228KFP#U1 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21228KFP#U1, 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 R5F21228KFP#U1 part is unused and in its original packaging.
Return procedure for R5F21228KFP#U1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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