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Renesas R5F21218KFP#U1
- Part No.:
- R5F21218KFP#U1
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F21218KFP#U1.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,801
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Product details
Overview
R5F21218KFP#U1 from Renesas Electronics is a 16-bit R8C/21 Group microcontroller featuring an embedded 64 KB flash program ROM, dual 1 KB data flash blocks, 3 KB RAM, and a 48-pin LQFP package. It operates at up to 20 MHz (VCC = 3.0–5.5 V), integrates a 10-bit 12-channel ADC, hardware LIN module (using Timer RA and UART0), and supports -40°C to +125°C ambient operation. It targets automotive body control modules requiring nonvolatile parameter storage and LIN communication.
For engineers reviewing the R5F21218KFP#U1 datasheet, R5F21218KFP#U1 pinout, R5F21218KFP#U1 application, or R5F21218KFP#U1 equivalent, this page delivers verified technical context, validated pin functions, confirmed operating conditions, and real-world automotive and industrial use cases - all grounded in Renesas' official R8C/21 Group documentation (Rev.2.00, Aug 2008).
Technical Context
The R5F21218KFP#U1 implements the R8C CPU core with 89 fundamental instructions and executes at 50 ns minimum instruction time (20 MHz, 3.0–5.5 V). Its memory architecture includes separate program ROM (64 KB) and data flash (2 × 1 KB), enabling field-updatable calibration data without erasing application code.
Peripheral integration centers on deterministic real-time control: two 16-bit Timer RD channels support input capture and output compare for motor timing; UART0 pairs with Timer RA to implement hardware LIN 2.0/2.1 physical layer; and the 12-channel ADC provides synchronized sampling for sensor monitoring in engine bay or chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and register bank switching for fast context save |
| Flash Memory | 64 KB program ROM + 2 × 1 KB data flash blocks - enables firmware updates and persistent configuration storage |
| RAM | 3 KB on-chip SRAM - sufficient for real-time task stacks, LIN protocol buffers, and ADC result buffering |
| ADC | 10-bit resolution, 12 input channels - supports simultaneous sampling of temperature, voltage, and position sensors |
| Timers | Timer RA (8-bit), RB (8-bit), RD (16-bit × 2), RE (8-bit) - provides PWM generation, pulse-width measurement, and LIN baud rate timing |
| LIN Interface | Hardware LIN module using UART0 + Timer RA - meets LIN 2.0/2.1 timing requirements without CPU overhead |
| Operating Temp | -40°C to +125°C (K version) - qualified for under-hood automotive environments per Renesas "Standard" grade |
| Supply Voltage | 2.7–5.5 V - compatible with 3.3 V and 5 V automotive subsystems and tolerant of battery transients |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm, 0.5 mm pitch - RoHS-compliant surface-mount package suitable for automated assembly and thermal cycling in automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0 to P0_7 | Analog Input / I/O Port | 12-channel ADC inputs (AN0–AN7); configurable as general-purpose CMOS I/O with software-selectable pull-ups |
| P1_0 to P1_3 | Key Input / Analog Input | KI0–KI3 interrupt-capable inputs; also serve as ADC channels AN8–AN11 for multi-sensor interfaces |
| P1_4 / P1_5 | UART0 TXD0 / RXD0 | Dedicated full-duplex UART pins - used with Timer RA for hardware LIN master/slave operation |
| P2_0 to P2_7 | Timer RD I/O | TRDIOA0–TRDIOD1 and TRDCLK - support input capture (e.g., crankshaft position) and PWM output (e.g., fan control) |
| P3_3 / P3_4 / P3_5 | SSI / SCS / SCL-SDA | Clock synchronous serial I/O with chip select and I²C bus interface - enables communication with EEPROMs and sensors |
| XIN / XOUT | Crystal Oscillator Input/Output | Supports external crystal (1–20 MHz) or ceramic resonator - required for precise LIN baud rate generation |
| RESET | Active-Low Reset Input | Asynchronous reset pin - initiates cold start sequence and clears CPU registers and peripheral states |
| MODE | Boot Mode Selection | Must be pulled high via resistor to enable normal flash execution mode; critical for production boot reliability |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN Module | Integrated UART0 + Timer RA eliminates software bit-banging - ensures ±1.5% baud accuracy over temperature for LIN 2.x compliance |
| Data Flash Endurance | 10,000 write/erase cycles per 1 KB block - supports lifetime logging of odometer, fault codes, or calibration offsets |
| Oscillation Stop Detection | Monitors XIN clock failure and triggers reset - prevents system hang during crystal fault in safety-critical subsystems |
| Voltage Detection Circuit | On-chip brown-out detection with programmable threshold - safeguards against corrupted flash writes during supply dip |
| 7-Level Interrupt Priority | Hardware-nested interrupt controller - enables deterministic response to LIN frame reception, ADC EOC, and timer events |
| High-Speed On-Chip Oscillator | Adjustable 1–20 MHz RC oscillator - allows fast wake-up from STOP mode without external crystal startup delay |
Applications
| Automotive Door Module | Industrial Motor Controller |
|---|---|
Use Scenario: Centralized control of power windows, locks, mirrors, and interior lighting in modern vehicle door assemblies. IC Role / Device Role / Timing Role: Primary MCU executing LIN slave node firmware, managing local sensor inputs (switches, Hall effect), and driving window motor H-bridges via PWM. Use Value: Dual data flash blocks store individual window auto-reverse thresholds and mirror position offsets across vehicle lifetime without requiring external EEPROM. |
Use Scenario: Closed-loop speed and direction control of 24 V DC brush motors in HVAC blowers and conveyor systems. IC Role / Device Role / Timing Role: Real-time executor of PID loop using 12-channel ADC (current, voltage, temp) and Timer RD for precise 20 kHz PWM generation. Use Value: Hardware LIN interface enables seamless integration into building management networks for remote diagnostics and parameter tuning. |
| Body Control Unit (BCU) | Smart Lighting Node |
Use Scenario: Aggregation and coordination of lighting, wiper, horn, and seatbelt reminder functions across vehicle body domains. IC Role / Device Role / Timing Role: LIN master node polling multiple slave nodes while running CAN gateway logic (via external transceiver) and managing watchdog supervision. Use Value: -40°C to +125°C operation and on-chip voltage detection ensure reliable function during engine start-stop cycles and under-hood thermal stress. |
Use Scenario: Adaptive LED driver node with dimming, color mixing, and thermal derating in commercial architectural lighting fixtures. IC Role / Device Role / Timing Role: Sensor fusion hub reading ambient light, occupancy, and temperature; generating PWM outputs for RGBW LED channels. Use Value: 10-bit ADC with internal reference (VREF pin) delivers stable brightness control independent of supply rail fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21218JFP#U1 | Same core, memory, and peripherals but rated for -40°C to +85°C only; lacks extended temperature qualification | Suitable for cabin-mounted modules (e.g., center console) but not under-hood or exterior locations | Select when cost-sensitive designs operate within standard automotive cabin temperature range |
| R5F21228KFP#U1 | Upgraded R8C/22 Group variant with 128 KB program ROM, 6 KB RAM, and enhanced LIN timing accuracy (±0.5%) | Required for complex BCU firmware with OTA update capability and dual CAN/LIN gateways | Choose when future-proofing for larger code footprint or stricter LIN timing budgets beyond R5F21218KFP#U1's ±1.5% |
Compared with R5F21218JFP#U1, the R5F21218KFP#U1 adds guaranteed operation at 125°C and qualifies for under-hood deployment; compared with R5F21228KFP#U1, it trades memory headroom and tighter LIN tolerance for lower unit cost and proven qualification in high-volume door modules.
Availability
R5F21218KFP#U1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor controllers, and smart lighting systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F21218KFP#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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for automotive and industrial markets.
The R5F21218KFP#U1 belongs to the R8C/21 Group - a family of 16-bit MCUs designed specifically for cost-sensitive, thermally demanding automotive sub-systems where integrated LIN, ADC, and data flash reduce bill-of-materials and board space.
FAQ
What is the maximum operating frequency of the R5F21218KFP#U1?
The R5F21218KFP#U1 supports a maximum operating frequency of 20 MHz when powered at VCC = 3.0–5.5 V. At this speed, its minimum instruction execution time is 50 ns. Operation at 16 MHz is also supported per the K-version specification, and 10 MHz operation extends the supply voltage range down to 2.7 V - enabling flexibility across automotive battery voltage profiles.
Does the R5F21218KFP#U1 include hardware LIN support?
Yes, the R5F21218KFP#U1 integrates a dedicated hardware LIN module that combines UART0 and Timer RA to meet LIN 2.0/2.1 physical layer timing requirements. This implementation achieves ±1.5% baud rate accuracy over the full -40°C to +125°C range without CPU intervention, reducing firmware complexity and jitter in automotive network nodes.
How much data flash memory does the R5F21218KFP#U1 have, and what is its endurance?
The R5F21218KFP#U1 contains two independent 1 KB data flash blocks (total 2 KB), each rated for 10,000 write/erase cycles. This allows robust storage of calibration data, fault logs, or user settings without wearing out the main program flash, which is rated for only 1,000 cycles - a key differentiator from the R8C/20 Group.
What package type and pin count does the R5F21218KFP#U1 use?
The R5F21218KFP#U1 uses a 48-pin plastic LQFP package designated PLQP0048KB-A: 7 mm × 7 mm body size with 0.5 mm pin pitch. This RoHS-compliant package is optimized for reflow soldering, thermal dissipation in automotive enclosures, and compatibility with standard PCB routing densities for body control applications.
Can the R5F21218KFP#U1 operate in extended temperature environments?
Yes - the 'K' suffix in R5F21218KFP#U1 denotes qualification for -40°C to +125°C operating ambient temperature, meeting Renesas' "Standard" quality grade for automotive under-hood and exterior applications. This rating is validated per JEDEC JESD22-A108 and includes full functionality of all peripherals, including ADC linearity and LIN timing accuracy, across the full range.
R5F21218KFP#U1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/2x/21
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21218KFP#U1 FAQ
1.How can I place an order for R5F21218KFP#U1 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21218KFP#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 R5F21218KFP#U1 reliable?
The price and inventory of R5F21218KFP#U1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21218KFP#U1 is usually 5 days.
3.What payment methods are accepted for R5F21218KFP#U1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21218KFP#U1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21218KFP#U1?
R5F21218KFP#U1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21218KFP#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 R5F21218KFP#U1?
For technical support, including R5F21218KFP#U1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21218KFP#U1 requirements.
6.How does Aetrix verify that R5F21218KFP#U1 is sourced from the original manufacturer or authorized distributors?
All R5F21218KFP#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 R5F21218KFP#U1 meets industry standards.
7.What is the process for return or replacement of R5F21218KFP#U1?
All R5F21218KFP#U1 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21218KFP#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 R5F21218KFP#U1 part is unused and in its original packaging.
Return procedure for R5F21218KFP#U1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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