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Renesas R5F2120AJFP#U0
- Part No.:
- R5F2120AJFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F2120AJFP#U0.pdf
- Description:
- IC MCU 16BIT 96KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,858
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Product details
Overview
R5F2120AJFP#U0 from Renesas Electronics is a 16-bit R8C/20 Group microcontroller with 96 KB flash program memory, 5 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, hardware LIN module (using Timer RA and UART0), two 16-bit timer RD channels with input capture/output compare, and operates from 3.0–5.5 V at up to 20 MHz for automotive body control applications.
For engineers reviewing the R5F2120AJFP#U0 datasheet, R5F2120AJFP#U0 pinout, R5F2120AJFP#U0 application, or R5F2120AJFP#U0 equivalent, this MCU delivers deterministic real-time control with integrated LIN bus support, on-chip voltage detection, oscillation stop detection, and data retention via internal RAM - critical for ECU firmware updates, sensor interfacing, and low-power wake-up systems.
Technical Context
The R5F2120AJFP#U0 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 map spans 1 Mbyte address space, with fixed interrupt vector table at 0FFDCh–0FFFFh and SFRs mapped to 00000h–002FFh.
Peripheral integration includes UART0 (LIN-capable), UART1, I²C bus interface, clock-synchronous serial I/O with chip select, 8-bit timers RA/RB, 16-bit timer RD (2 channels), 8-bit timer RE, and watchdog timer with 15-bit counter and prescaler - all controlled via dedicated special function registers in the SFR region.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and register bank switching |
| Flash Memory | 96 KB program ROM; supports in-system programming at VCC = 2.7–5.5 V |
| RAM | 5 KB on-chip SRAM for variables, stack, and interrupt handling |
| ADC | 10-bit successive-approximation A/D converter with 12 analog inputs (AN0–AN11) |
| Timers | Timer RD: 16-bit ×2 channels with input capture/output compare; Timer RA/RB: 8-bit ×2; Timer RE: 8-bit compare match |
| Serial Interfaces | UART0 (LIN-capable), UART1, I²C bus interface, clock-synchronous serial I/O with chip select |
| Supply Voltage | 3.0–5.5 V (J version); supports 20 MHz operation without derating |
| Operating Temperature | −40°C to +85°C ambient; qualified for automotive body electronics |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm, 0.5 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Analog Input / GPIO | 12-channel ADC inputs (AN0–AN7) and general-purpose CMOS I/O with programmable pull-up |
| P1_0–P1_7 | GPIO / Key Input / Serial | KI0–KI3 key interrupt inputs; TXD0/RXD0 for UART0; CLK0 for synchronous serial |
| P2_0–P2_7 | Timer RD I/O | TRDIOA0–TRDIOD1 and TRDCLK for 16-bit timer RD channel A/B/C/D with capture/compare |
| P3_0, P3_1 | Timer Output | TRAO (Timer RA output), TRBO (Timer RB output) |
| P3_3–P3_5, P3_7 | I²C / SSI / SSO | SCL/SDA (I²C), SSI/SSCK/SCS/SSO (clock-synchronous serial with chip select) |
| P4_2 | VREF Input | External reference voltage input for 10-bit ADC precision scaling |
| P4_6 / P4_7 | XIN / XOUT | Crystal/resonator connection for main system clock; XOUT is output-only |
| RESET | Active-Low Reset | Asynchronous reset input; initiates hardware reset sequence on logic low |
| MODE | Boot Mode Select | Must be pulled high via external resistor to enable normal flash execution mode |
| VCC / VSS | Power / Ground | Dual power domains: VCC/AVCC (digital/analog supply), VSS/AVSS (digital/analog ground) |
Key Features
| Feature | Design Value |
|---|---|
| Hardware LIN Module | Integrated LIN 2.0/2.1 physical layer support via UART0 + Timer RA - eliminates external transceiver for basic node implementation |
| Data Retention Architecture | On-chip voltage detection and oscillation stop detection enable safe shutdown and recovery without external supervision circuits |
| Flexible Clock System | Dual clock sources: external crystal (XIN/XOUT) and high-speed/low-speed on-chip oscillators with frequency adjustment capability |
| Interrupt Management | 11 internal + 5 external + 4 software interrupt sources with 7-level priority and dedicated interrupt stack pointer (ISP) |
| Emulator Debug Support | Dedicated debug area (20000h–23FFFh) reserved for Renesas E8/E10 emulator - enables non-intrusive real-time debugging |
| Automotive-Qualified Operation | Rated for −40°C to +85°C ambient; meets Renesas "Standard" quality grade for automotive body electronics per document Rev.2.00 |
Applications
| Body Control Module (BCM) | Door Module Controller |
|---|---|
Use Scenario: Centralized management of lighting, window lifts, mirror adjustment, and door lock actuation in passenger vehicles. IC Role / Device Role / Timing Role: Primary MCU executing LIN slave firmware, polling switches via KI0–KI3, driving relays via P2/P3 GPIO, and reading cabin sensors via 10-bit ADC. Use Value: Hardware LIN module reduces BOM cost by eliminating discrete LIN transceivers; 96 KB flash accommodates multi-feature firmware with OTA update headroom. |
Use Scenario: Local control unit inside vehicle door housing window motor, lock solenoid, and puddle lamp drivers. IC Role / Device Role / Timing Role: Real-time motor control using Timer RD PWM outputs; LIN communication with BCM; ADC monitoring of motor current and temperature. Use Value: 16-bit timer RD with input capture enables precise stall detection; 5 KB RAM supports dual-task scheduling for motor control and LIN protocol stack. |
| Roof Module (Sunroof/Climate) | Seat Position Controller |
Use Scenario: Sunroof glass/motor control and ambient light sensing for automatic dimming in roof console assemblies. IC Role / Device Role / Timing Role: ADC reads ambient light (AN4–AN7) and motor current; UART1 communicates with HVAC ECU; P0/P1 GPIO drives H-bridge direction signals. Use Value: 12-channel ADC allows simultaneous sampling of multiple sensors; 48-pin LQFP provides sufficient I/O for mixed analog/digital subsystems without external expanders. |
Use Scenario: Motorized seat position memory and adjustment using potentiometer feedback and limit switch inputs. IC Role / Device Role / Timing Role: 10-bit ADC reads seat track potentiometers (AN0–AN3); Timer RA generates PWM for DC motor speed control; INT0–INT3 detect end-stop switches. Use Value: On-chip voltage detection ensures safe motor shutdown during battery brownout; 20 MHz operation guarantees <100 µs response to seat switch events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21208JFP | 64 KB program ROM, 3 KB RAM; identical peripheral set and pinout | Lower memory footprint suits simpler door modules without diagnostics or logging | Select when firmware size is ≤60 KB and cost sensitivity outweighs future scalability needs |
| R5F2121AJFP | R8C/21 Group variant with 1 KB ×2 data flash; same 96 KB program ROM and 5 KB RAM | Enables EEPROM-like parameter storage without external serial EEPROM | Choose when runtime configuration persistence (e.g., seat memory positions) is required without adding external components |
Compared with R5F21208JFP, R5F2120AJFP#U0 offers 32 KB more program space for enhanced diagnostics and bootloader robustness; compared with R5F2121AJFP, it lacks data flash but provides identical real-time performance and lower cost for write-once firmware deployments.
Availability
R5F2120AJFP#U0 is available at Aetrix Electronics and suitable for automotive body electronics, industrial human-machine interfaces, and appliance control systems requiring stable component supply across extended product lifecycles.
Supply support for R5F2120AJFP#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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.
The R8C/20 Group, including R5F2120AJFP#U0, was designed for cost-sensitive automotive body electronics and industrial control applications requiring high reliability, integrated LIN, and efficient 16-bit processing in compact LQFP packages.
FAQ
What is the maximum operating frequency of the R5F2120AJFP#U0?
The R5F2120AJFP#U0 supports a maximum operating frequency of 20 MHz when powered at 3.0–5.5 V (J version). At this frequency, its minimum instruction execution time is 50 ns. The device achieves this using either an external crystal/resonator on XIN/XOUT or the internal high-speed oscillator with frequency adjustment capability.
Does the R5F2120AJFP#U0 include hardware LIN support?
Yes, the R5F2120AJFP#U0 integrates a hardware LIN module that combines UART0 and Timer RA to implement LIN 2.0/2.1 physical layer functionality. This eliminates the need for an external LIN transceiver in basic slave-node applications such as door modules or seat controllers, reducing system cost and PCB area.
What is the purpose of the MODE pin on the R5F2120AJFP#U0?
The MODE pin on the R5F2120AJFP#U0 must be externally pulled high (typically via a 10 kΩ resistor to VCC) to select normal flash program execution mode. If left floating or pulled low, the device enters boot mode and may execute code from alternate memory regions - correct MODE pin biasing is essential for reliable startup behavior.
How much data flash memory does the R5F2120AJFP#U0 have?
The R5F2120AJFP#U0 belongs to the R8C/20 Group and does not include embedded data flash memory. It contains only program flash (96 KB) and SRAM (5 KB). For data flash functionality (1 KB ×2 blocks), the R8C/21 Group part R5F2121AJFP is the direct counterpart.
What package type is used for the R5F2120AJFP#U0?
The R5F2120AJFP#U0 uses a 48-pin plastic LQFP package designated PLQP0048KB-A, with 7 mm × 7 mm body size and 0.5 mm pin pitch. This RoHS-compliant package supports reflow soldering and provides mechanical stability for automotive under-hood and cabin applications.
R5F2120AJFP#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:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, Voltage Detect, WDT
- Number of I/O:
- 41
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 5K 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:
R5F2120AJFP#U0 FAQ
1.How can I place an order for R5F2120AJFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2120AJFP#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 R5F2120AJFP#U0 reliable?
The price and inventory of R5F2120AJFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2120AJFP#U0 is usually 5 days.
3.What payment methods are accepted for R5F2120AJFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2120AJFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2120AJFP#U0?
R5F2120AJFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2120AJFP#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 R5F2120AJFP#U0?
For technical support, including R5F2120AJFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2120AJFP#U0 requirements.
6.How does Aetrix verify that R5F2120AJFP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F2120AJFP#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 R5F2120AJFP#U0 meets industry standards.
7.What is the process for return or replacement of R5F2120AJFP#U0?
All R5F2120AJFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2120AJFP#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 R5F2120AJFP#U0 part is unused and in its original packaging.
Return procedure for R5F2120AJFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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