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Renesas R5F2120CKFP#U0
- Part No.:
- R5F2120CKFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F2120CKFP#U0.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,869
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Product details
Overview
R5F2120CKFP#U0 from Renesas Electronics is a 16-bit R8C/20 Group microcontroller with 128 KB flash program memory, 6 KB RAM, and 41 I/O pins in a 48-pin LQFP package. It features an R8C CPU core, 10-bit 12-channel ADC, dual UARTs, LIN module, I²C interface, and timers including two 16-bit channels for input capture/output compare - used in automotive body control modules requiring deterministic real-time response.
For engineers reviewing the R5F2120CKFP#U0 datasheet, R5F2120CKFP#U0 pinout, R5F2120CKFP#U0 application, or R5F2120CKFP#U0 equivalent, key selection criteria include its K-version industrial temperature range (−40°C to +125°C), absence of embedded data flash (distinguishing it from R8C/21 Group), and compatibility with Renesas' E8 emulator debugging environment.
Technical Context
The R5F2120CKFP#U0 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 1 Mbyte address space with fixed interrupt vectors at 0FFDCh–0FFFFh and supports single-chip operation without external memory.
Peripheral integration includes Timer RD (16-bit × 2 channels) with input capture/output compare capability, hardware LIN bus support using Timer RA and UART0, and dual UARTs (UART0 with clock-synchronous I/O mode, UART1 standalone). The A/D converter provides 12 analog inputs with internal reference voltage support via VREF pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and register bank switching |
| Flash Memory | 128 KB program ROM; no embedded data flash (R8C/20 Group distinction) |
| RAM | 6 KB on-chip SRAM for variables, stack, and subroutine calls |
| Operating Voltage | 3.0–5.5 V at 20 MHz (K version); supports direct connection to automotive 5 V rail |
| Temperature Range | −40°C to +125°C (K version); qualified for under-hood automotive applications |
| A/D Converter | 10-bit resolution, 12-channel single-ended input with programmable sampling time |
| Timers | Timer RA/RB (8-bit × 2), Timer RD (16-bit × 2 with input capture/output compare), Timer RE (8-bit output) |
| Serial Interfaces | UART0 (LIN-capable), UART1, I²C bus (2-wire), clock-synchronous serial I/O with chip select |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm pitch. Pin 1 marked by dot; thermal pad exposed on underside (non-electrical).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Analog input / I/O port | AN0–AN7; 8 of 12 ADC channels; CMOS I/O with software-selectable pull-up |
| P1_0–P1_3 | Key input / analog input | KI0–KI3 and AN8–AN11; dedicated key interrupt inputs with debouncing support |
| P2_0–P2_7 | Timer RD I/O | TRDIOA0–TRDIOD1 and TRDCLK; 8-bit bidirectional timer I/O ports for capture/compare |
| P3_3–P3_5, P3_7 | I²C / serial I/O | SSI, SCS, SSCK, SCL, SDA, SSO; supports both I²C master/slave and synchronous serial modes |
| P4_2 | Reference voltage input | VREF; sets ADC reference independently from AVCC, enabling ratiometric measurements |
| P4_6/P4_7 | Crystal oscillator interface | XIN/XOUT; supports ceramic resonator or crystal up to 20 MHz; internal feedback resistor included |
| RESET | Active-low reset input | Asynchronous reset; internal power-on reset circuit ensures reliable startup across voltage ramp |
| MODE | Boot mode select | Must be pulled high externally; determines whether MCU boots from internal flash or external memory |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN Module | Integrated LIN 2.0/2.1 protocol engine using Timer RA and UART0; eliminates external transceiver for basic node functions |
| High-Speed On-Chip Oscillator | Adjustable 1–20 MHz RC oscillator; enables fast wake-up from stop mode without external crystal |
| Oscillation Stop Detection | Dedicated circuit monitors XIN clock; triggers reset or interrupt if crystal fails - critical for automotive fail-safe systems |
| Voltage Detection Circuit | On-chip brown-out detector with user-selectable threshold (2.7 V, 3.0 V, 3.3 V, 3.6 V); prevents erratic operation during supply sag |
| Emulator Debug Support | On-chip debug interface compatible with Renesas E8 emulator; allows full-speed execution tracing and breakpoint setting |
| Interrupt Priority Levels | 7-level nested priority system with IPL register; enables deterministic response to time-critical events like LIN frame reception |
Applications
| Body Control Module (BCM) | Door Module Controller |
|---|---|
Use Scenario: Centralized management of lighting, window lift, mirror adjustment, and door lock actuation in modern vehicles. IC Role / Device Role / Timing Role: Main MCU executing real-time control tasks, communicating via LIN to slave nodes, and monitoring analog sensor inputs (e.g., ambient light, position potentiometers). Use Value: 128 KB flash accommodates complex state machines and diagnostics; K-version temperature rating ensures reliability in cabin-mounted locations. | Use Scenario: Local control unit inside vehicle door housing motor drivers, switch interfaces, and anti-pinch sensors. IC Role / Device Role / Timing Role: LIN slave node with UART0-driven hardware LIN interface; uses Timer RD for precise PWM generation to drive window motors. Use Value: Integrated 10-bit ADC directly digitizes analog hall-effect sensor outputs; 41 GPIOs support diverse switch matrix scanning and driver enable signals. |
| Climate Control Panel | Seat Position Memory System |
Use Scenario: User interface and environmental regulation unit managing HVAC fan speed, blend door position, and temperature display. IC Role / Device Role / Timing Role: Human-machine interface controller reading key inputs (KI0–KI3), driving segmented LCD via GPIO, and communicating over I²C to sensor ICs. Use Value: Key interrupt capability reduces polling overhead; VREF pin enables accurate thermistor readings independent of supply variation. | Use Scenario: Memory and recall system storing driver seat position profiles using non-volatile storage and motor control. IC Role / Device Role / Timing Role: Standalone controller acquiring potentiometer feedback (AN0–AN7), executing PID position control, and storing settings in internal flash. Use Value: 6 KB RAM buffers multiple seat profiles; flash endurance (1,000 erase/write cycles) supports long-term calibration data retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F2121CKFP#U0 | Includes 2 KB data flash (1 KB × 2 blocks); identical program ROM, RAM, peripherals, and package | Required where firmware updates or parameter storage in dedicated data flash is needed (e.g., adaptive learning algorithms) | Select R5F2121CKFP#U0 only if data flash functionality is mandatory; otherwise R5F2120CKFP#U0 offers cost and code-space efficiency |
| R5F2122CKFP#U0 | Same R8C/20 Group architecture but adds CAN controller; retains 128 KB flash, 6 KB RAM, and K-temperature rating | Suitable for nodes requiring CAN backbone communication (e.g., gateway modules) instead of LIN-only topology | Choose R5F2122CKFP#U0 when CAN protocol support is required; R5F2120CKFP#U0 remains optimal for LIN-centric subsystems |
Compared with R5F2121CKFP#U0, R5F2120CKFP#U0 trades data flash for lower cost and simpler firmware management; versus R5F2122CKFP#U0, it omits CAN but delivers identical LIN performance and reduced gate count - making it the most targeted solution for cost-sensitive, LIN-based automotive body electronics.
Availability
R5F2120CKFP#U0 is available at Aetrix Electronics and suitable for automotive body control, industrial HMI panels, and appliance motor control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F2120CKFP#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 leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The R8C/20 Group, including R5F2120CKFP#U0, was designed for cost-optimized, real-time automotive body electronics with integrated LIN, ADC, and robust industrial temperature operation - targeting applications where reliability and peripheral integration outweigh raw processing throughput.
FAQ
What is the maximum operating frequency of the R5F2120CKFP#U0?
The R5F2120CKFP#U0 supports a maximum XIN clock frequency of 20 MHz at VCC = 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. This is specified for the K-version (−40°C to +125°C) and confirmed in the R8C/20 Group Hardware Manual Rev.2.00. The high-speed on-chip oscillator can also be adjusted up to 20 MHz for crystal-free operation.
Does the R5F2120CKFP#U0 include embedded data flash memory?
No, the R5F2120CKFP#U0 does not include embedded data flash memory. It belongs to the R8C/20 Group, which provides only program flash ROM (128 KB). Data flash (1 KB × 2 blocks) is exclusive to the R8C/21 Group, such as the R5F2121CKFP#U0. This distinction is explicitly defined in Renesas documentation Tables 1.1 and 1.2.
Which development tools are compatible with the R5F2120CKFP#U0?
The R5F2120CKFP#U0 is fully supported by Renesas' E8 emulator and associated CS+ (formerly High-performance Embedded Workshop) IDE. It uses the standard 14-pin JTAG-like debug interface defined for R8C devices. Flash programming is performed via on-chip bootloader using UART0 or dedicated programmer tools like PG-FP5.
What is the function of the MODE pin on the R5F2120CKFP#U0?
The MODE pin on the R5F2120CKFP#U0 must be externally pulled high (typically via 10 kΩ resistor to VCC) to configure the device for normal flash boot operation. During reset, MODE state determines whether the MCU fetches the initial program counter from internal flash or external memory space - a critical configuration for single-chip deployment.
How many analog input channels does the R5F2120CKFP#U0 support?
The R5F2120CKFP#U0 supports 12 analog input channels (AN0–AN11), all accessible through dedicated pins on ports P0, P1, and P4. These channels feed a single 10-bit successive-approximation ADC with configurable sampling time and trigger sources including software, timer, and external interrupts.
R5F2120CKFP#U0 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:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 6K 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:
R5F2120CKFP#U0 FAQ
1.How can I place an order for R5F2120CKFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2120CKFP#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 R5F2120CKFP#U0 reliable?
The price and inventory of R5F2120CKFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2120CKFP#U0 is usually 5 days.
3.What payment methods are accepted for R5F2120CKFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2120CKFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2120CKFP#U0?
R5F2120CKFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2120CKFP#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 R5F2120CKFP#U0?
For technical support, including R5F2120CKFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2120CKFP#U0 requirements.
6.How does Aetrix verify that R5F2120CKFP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F2120CKFP#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 R5F2120CKFP#U0 meets industry standards.
7.What is the process for return or replacement of R5F2120CKFP#U0?
All R5F2120CKFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2120CKFP#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 R5F2120CKFP#U0 part is unused and in its original packaging.
Return procedure for R5F2120CKFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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