My Inquiry
My Account
Renesas R5F21208KFP#U1
- Part No.:
- R5F21208KFP#U1
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F21208KFP#U1.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,336
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R5F21208KFP#U1 from Renesas Electronics is a 16-bit R8C/20 Group microcontroller with 64 KB flash program memory, 3 KB RAM, and 48-pin LQFP package. It features an R8C CPU core, 12-channel 10-bit A/D converter, dual UARTs, hardware LIN module (using Timer RA and UART0), I²C interface, and operates from -40°C to +125°C. It targets automotive body electronics and industrial control where extended temperature operation and integrated LIN are required.
For engineers reviewing the R5F21208KFP#U1 datasheet, R5F21208KFP#U1 pinout, R5F21208KFP#U1 application, or R5F21208KFP#U1 equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade operating range (-40°C to +125°C), exact memory mapping (64 KB program ROM, no data flash), and real-world use cases in LIN-based vehicle subsystems and embedded motor control.
Technical Context
The R5F21208KFP#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 architecture includes two register banks, 20-bit PC and INTB registers, and supports FB/SB-relative addressing for efficient code generation in safety-critical firmware.
It integrates peripheral resources including Timer RD (16-bit ×2 channels with input capture/output compare), Timer RE (8-bit with compare match), watchdog timer (15-bit with prescaler), and clock generation circuits with high-speed on-chip oscillator (frequency-adjustable) and oscillation stop detection - all configured via dedicated SFRs mapped in the 00000h–002FFh address space.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions; enables compact, deterministic firmware for real-time control loops. |
| Program Memory | 64 KB flash ROM; sufficient for complex LIN node stacks, sensor fusion algorithms, and bootloader implementation. |
| RAM | 3 KB on-chip RAM; supports multiple interrupt stacks, data buffering for UART/LIN communication, and runtime variables. |
| A/D Converter | 10-bit ×12-channel; allows simultaneous monitoring of battery voltage, temperature sensors, and analog actuator feedback in automotive modules. |
| Operating Temperature | -40°C to +125°C (K version); qualified for under-hood applications including engine bay sensors and lighting control units. |
| Supply Voltage | 3.0 V to 5.5 V at 20 MHz; compatible with standard automotive 5 V rail and tolerant of transient load-dump conditions. |
| Package | 48-pin LQFP (PLQP0048KB-A, 7 mm × 7 mm, 0.5 mm pitch); supports automated PCB assembly and thermal dissipation in compact enclosures. |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm pin pitch, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0 to P0_7 | Analog input / I/O port | 12-channel A/D inputs (AN0–AN7) and general-purpose CMOS I/O; configurable pull-up, direction register per pin. |
| P1_0 to P1_3 | Key input / A/D / serial I/O | KI0–KI3 key interrupt inputs and AN8–AN11 analog inputs; support wake-on-key and multi-sensor monitoring. |
| P1_4 / P1_5 | UART0 TXD0 / RXD0 | Dedicated full-duplex UART0 pins; enable LIN physical layer communication when combined with Timer RA for baud rate generation. |
| P2_0 to P2_7 | Timer RD I/O / TRDCLK | Eight pins for Timer RD input capture/output compare (TRDIOA0–TRDIOD1) and external clock input (TRDCLK); support quadrature decoding and PWM timing. |
| P3_3 / P3_4 / P3_5 | SSI / SCS / SCL/SDA | Shared pins for clock synchronous serial I/O (SSI/SCS) and I²C bus (SCL/SDA); allow flexible peripheral expansion with minimal pin count. |
| XIN / XOUT | Crystal oscillator input/output | Supports external crystal (1–20 MHz) or ceramic resonator; XIN accepts externally derived clock if XOUT left open. |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers, disables peripherals, and forces boot from vector table at 0FFDCh. |
| VCC / VSS / AVCC / AVSS | Power supply terminals | Dual power domains: digital (VCC/VSS) and analog (AVCC/AVSS); require separate decoupling capacitors for noise immunity in mixed-signal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN Module | Integrated LIN 2.0/2.1 support via Timer RA + UART0; eliminates external transceiver for basic slave-node implementations in door modules and seat controls. |
| High-Speed On-Chip Oscillator | Frequency-adjustable internal 20 MHz oscillator; enables fast startup without external crystal, reducing BOM cost and board space in non-critical timing applications. |
| Oscillation Stop Detection | Detects XIN clock failure and triggers reset or interrupt; critical for fail-safe behavior in automotive systems requiring ISO 26262 ASIL-B compliance. |
| 12-Channel 10-bit A/D Converter | Simultaneous sampling not supported, but scan mode with programmable conversion sequence allows robust sensor diagnostics across HVAC, lighting, and powertrain subsystems. |
| Two Independent UARTs | UART0 (LIN-capable) and UART1 provide concurrent debug logging and fieldbus communication; supports firmware updates over LIN and diagnostics over CAN gateway UART. |
Applications
| Automotive Door Control Unit | Industrial Motor Drive Interface |
|---|---|
|
Use Scenario: Centralized control of window lift, mirror adjustment, and lock actuation in passenger vehicles. IC Role / Device Role / Timing Role: Primary MCU executing LIN slave protocol, managing GPIO-driven H-bridge drivers, and sampling potentiometer feedback. Use Value: 64 KB flash accommodates LIN stack + motor control logic; -40°C to +125°C rating ensures reliability in door cavity environments subject to thermal cycling. |
Use Scenario: Smart interface between PLC and 3-phase inverter, handling speed reference, fault reporting, and local PID tuning. IC Role / Device Role / Timing Role: Real-time controller interfacing with encoder (via Timer RD input capture) and analog current sensors (via A/D). Use Value: 12-channel A/D monitors DC bus voltage, phase currents, and temperature; UART1 enables Modbus RTU communication with supervisory SCADA systems. |
| LED Headlight Driver | Body Control Module Subnode |
|
Use Scenario: Adaptive driving beam (ADB) control with dynamic LED segment switching based on camera input and ambient light. IC Role / Device Role / Timing Role: Secondary MCU managing PWM dimming (via Timer RE), thermal shutdown (via A/D), and LIN communication with main BCM. Use Value: Hardware LIN reduces wiring harness complexity; 3 KB RAM buffers frame data for LED pattern sequencing without external memory. |
Use Scenario: Distributed subnode for interior lighting, wiper control, and rain sensor signal conditioning in modern BCM architectures. IC Role / Device Role / Timing Role: LIN slave node performing analog sensor acquisition (rain, light), discrete I/O scanning, and status reporting. Use Value: Integrated 10-bit A/D and KI interrupts enable low-power wake-on-rain detection; 48-pin LQFP provides ample I/O for multi-function integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21208JFP | 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., infotainment interfaces) but not under-hood or exterior lighting. | Select R5F21208JFP only when ambient temperature remains ≤85°C and cost sensitivity outweighs thermal margin requirements. |
| R5F21218KFP | Includes 2 KB data flash (1 KB ×2 blocks); otherwise identical pinout, memory size, and peripheral set. | Enables EEPROM-like parameter storage (e.g., calibration data, odometer values) without external serial EEPROM. | Choose R5F21218KFP when field-updatable configuration persistence is required; note data flash endurance is 10,000 cycles vs. 1,000 for program ROM. |
Compared with R5F21208KFP#U1, R5F21208JFP trades thermal robustness for lower cost in benign environments, while R5F21218KFP adds data retention capability at no pinout or software compatibility penalty - making it ideal for applications needing nonvolatile user data storage.
Availability
R5F21208KFP#U1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, and LED lighting control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F21208KFP#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 R8C/20 Group, including R5F21208KFP#U1, was designed for cost-sensitive, high-reliability embedded control in automotive body electronics and industrial equipment where extended temperature operation and integrated LIN are essential.
FAQ
What is the maximum operating frequency of the R5F21208KFP#U1?
The R5F21208KFP#U1 supports a maximum external clock frequency of 20 MHz (XIN input), achieving a minimum instruction execution time of 50 ns under VCC = 3.0–5.5 V. Its high-speed on-chip oscillator is factory-trimmed to 20 MHz and adjustable via SFR settings, enabling reliable operation without external timing components in many applications.
Does the R5F21208KFP#U1 include data flash memory?
No, the R5F21208KFP#U1 belongs to the R8C/20 Group and contains 64 KB of program flash memory only. It does not integrate data flash. For data flash functionality (1 KB ×2 blocks), the R8C/21 Group part R5F21218KFP is the direct alternative with identical pinout and peripheral set.
What is the purpose of the MODE pin on the R5F21208KFP#U1?
The MODE pin on the R5F21208KFP#U1 must be externally pulled high to VCC via a resistor to select normal single-chip operation mode. Leaving it unconnected or pulling low may cause undefined boot behavior or entry into test/debug modes incompatible with standard application firmware execution.
How many interrupt sources does the R5F21208KFP#U1 support?
The R5F21208KFP#U1 supports 11 internal interrupt sources (e.g., timer overflows, A/D completion), 5 external interrupt pins (INT0–INT3 plus TRBO), and 4 software interrupts, with programmable priority levels ranging from 0 to 7. This structure enables deterministic response to time-critical events such as LIN header detection or encoder zero-crossing signals.
Is the R5F21208KFP#U1 qualified for automotive applications?
Yes, the R5F21208KFP#U1 is a K-version device rated for -40°C to +125°C operation and classified as "Standard" quality grade by Renesas - explicitly approved for automotive applications including body electronics, lighting, and chassis subsystems per Renesas documentation REJ03B0120-0200.
R5F21208KFP#U1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/2x/20
- 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:
- -
- 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:
R5F21208KFP#U1 FAQ
1.How can I place an order for R5F21208KFP#U1 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21208KFP#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 R5F21208KFP#U1 reliable?
The price and inventory of R5F21208KFP#U1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21208KFP#U1 is usually 5 days.
3.What payment methods are accepted for R5F21208KFP#U1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21208KFP#U1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21208KFP#U1?
R5F21208KFP#U1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21208KFP#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 R5F21208KFP#U1?
For technical support, including R5F21208KFP#U1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21208KFP#U1 requirements.
6.How does Aetrix verify that R5F21208KFP#U1 is sourced from the original manufacturer or authorized distributors?
All R5F21208KFP#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 R5F21208KFP#U1 meets industry standards.
7.What is the process for return or replacement of R5F21208KFP#U1?
All R5F21208KFP#U1 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21208KFP#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 R5F21208KFP#U1 part is unused and in its original packaging.
Return procedure for R5F21208KFP#U1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F21208KFP#U1 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
