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Renesas R5F2122CJFP#W4
- Part No.:
- R5F2122CJFP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F2122CJFP#W4.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
R5F2122CJFP#W4 from Renesas Electronics is a 16-bit R8C/22 Group microcontroller with 128 KB flash program memory, 6 KB RAM, and integrated CAN 2.0B interface - designed for automotive and industrial networking applications requiring real-time control, analog sensing, and robust serial communication. It operates at up to 20 MHz (50 ns min. instruction time), supports -40°C to +85°C ambient temperature, and is housed in a 48-pin LQFP package.
For engineers reviewing the R5F2122CJFP#W4 datasheet, R5F2122CJFP#W4 pinout, R5F2122CJFP#W4 application, or R5F2122CJFP#W4 equivalent, this page delivers verified technical context, validated pin functions, confirmed peripheral capabilities (CAN, LIN, UART, 12-channel 10-bit ADC), and real-world selection guidance for embedded control systems.
Technical Context
The R5F2122CJFP#W4 implements the R8C CPU core with 89 fundamental instructions and a 1 Mbyte unified address space. Its architecture integrates dual clock generation circuits (XIN-based crystal oscillator and adjustable high-speed on-chip oscillator), on-chip voltage detection, and power-on reset - enabling reliable operation across automotive supply variations.
Peripheral integration includes one CAN 2.0B module (16 message slots), hardware LIN (using Timer RA and UART0), two UART channels, I²C bus interface, three 8-bit timers (RA/RB), two 16-bit timer RD channels with input capture/output compare, and a 10-bit A/D converter with 12 analog inputs - all mapped to dedicated pins in the 48-pin LQFP package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit CISC core with 89 instructions and 1 Mbyte address space |
| Flash Memory | 128 KB program ROM; supports in-system programming at VCC = 2.7–5.5 V |
| RAM | 6 KB on-chip SRAM for data storage, stack, and subroutine execution |
| CAN Interface | Single CAN 2.0B-compliant controller with 16 message buffers and dedicated CTX0/CRX0 pins |
| A/D Converter | 10-bit resolution, 12-channel SAR ADC with internal reference support via VREF pin |
| Operating Temp | -40°C to +85°C (J version); qualified for automotive and industrial environments |
| Supply Voltage | 3.0 V to 5.5 V at 20 MHz; compatible with standard 5 V and 3.3 V system rails |
| Package | 48-pin LQFP (PLQP0048KB-A), 7 mm × 7 mm, 0.5 mm pitch |
Pinout & Package
Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm lead pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / AVCC (Pin 11) | Power supply input | Main digital supply (VCC) and analog reference supply (AVCC) - decoupling capacitor required between AVCC and AVSS |
| VSS / AVSS (Pin 9) | Ground reference | Digital ground (VSS) and analog ground (AVSS) - separate routing recommended for noise-sensitive ADC operation |
| XIN (Pin 10) / XOUT (Pin 8) | Clock input/output | Crystal/resonator connection points for main system clock; XOUT is output-only in crystal mode |
| RESET (Pin 7) | Active-low reset input | Asynchronous reset assertion resets CPU, peripherals, and registers; internal pull-up enabled |
| CTX0 (Pin 43) / CRX0 (Pin 42) | CAN transceiver interface | Dedicated CAN transmit (CTX0) and receive (CRX0) pins - require external CAN transceiver for physical layer |
| AN0–AN11 (Pins 36–40, 44–47, 24, 28–30) | Analog inputs | 12-channel 10-bit ADC inputs; AN0–AN7 on P0, AN8–AN11 on P1/P3; VREF (Pin 40) sets conversion reference |
| INT0–INT3 (Pins 25, 26, 27, 31) | External interrupt inputs | Four dedicated edge-triggered interrupt pins; INT0 also serves as Timer RD input |
| TXD0/RXD0 (Pins 23/22) | UART0 serial interface | Full-duplex asynchronous communication channel; supports LIN protocol when combined with Timer RA |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0B Controller | Enables deterministic vehicle network communication without external CAN controller IC |
| Hardware LIN Module | Combines Timer RA and UART0 to implement LIN 2.0/2.1 master/slave without firmware overhead |
| On-Chip Oscillation Stop Detection | Monitors XIN clock failure and triggers reset or interrupt - critical for automotive fail-safe operation |
| Programmable High-Speed On-Chip Oscillator | Adjustable frequency (±2% accuracy) eliminates need for external crystal in cost-sensitive applications |
| Data Retention During Power Loss | On-chip voltage detection circuit enables controlled shutdown and nonvolatile data preservation |
| Emulator Debug Support | Dedicated debug area (20000h–23FFFh) enables real-time trace and breakpoint debugging via Renesas E8/E10 emulators |
Applications
| Automotive Body Control Module | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, lighting, and HVAC in passenger vehicles using CAN bus communication. IC Role / Device Role / Timing Role: Primary MCU executing real-time control logic, managing CAN message scheduling, and sampling analog sensor inputs (temperature, position). Use Value: Integrated CAN 2.0B and 12-channel ADC eliminate external interface ICs, reducing BOM count and PCB footprint while meeting AEC-Q100 stress requirements. | Use Scenario: Closed-loop speed/torque regulation of BLDC motors in factory automation equipment with fieldbus connectivity. IC Role / Device Role / Timing Role: Real-time motor commutation timing generator, PWM signal source, and CAN-based command interpreter for PLC-level coordination. Use Value: 16-bit Timer RD with input capture/output compare provides precise phase-aligned PWM; CAN interface enables interoperability with higher-level SCADA systems. |
| Smart Sensor Node for Predictive Maintenance | Medical Diagnostic Equipment Subsystem |
Use Scenario: Vibration and temperature monitoring node deployed on rotating machinery, transmitting processed data over CAN to gateway units. IC Role / Device Role / Timing Role: Signal acquisition front-end with 10-bit ADC oversampling, FIR filtering in firmware, and CAN message formatting engine. Use Value: On-chip 128 KB flash stores complex calibration algorithms and firmware updates; low-power modes extend battery life in wireless variants. | Use Scenario: Embedded subsystem in ultrasound or patient monitor devices handling transducer interface, analog front-end control, and status reporting. IC Role / Device Role / Timing Role: Safety-monitored controller managing analog sensor biasing, watchdog-triggered fault logging, and isolated UART communication to host processor. Use Value: On-chip voltage detection, oscillation stop detection, and programmable reset behavior support Class II medical device safety compliance per IEC 62304. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F2123CJFP#W4 | Includes 2 KB data flash (1 KB × 2 blocks); same pinout, peripherals, and memory layout except added data flash region at 02400h–02BFFh | Required where field-upgradable configuration storage or EEPROM emulation is needed | Select R5F2123CJFP#W4 if nonvolatile parameter storage beyond program ROM is essential; otherwise R5F2122CJFP#W4 offers identical control capability at lower cost |
| R5F2122CKFP#W4 | Same core, memory, and peripherals but rated for -40°C to +125°C ambient; K version uses higher-temperature qualified silicon and packaging | Necessary for under-hood automotive or high-ambient industrial deployments | Choose R5F2122CKFP#W4 only when extended temperature operation is mandatory; R5F2122CJFP#W4 suffices for cabin or control cabinet use |
Compared with R5F2122CJFP#W4, R5F2123CJFP#W4 adds data flash for runtime parameter storage without changing pinout or software compatibility, while R5F2122CKFP#W4 extends thermal range at the cost of higher qualification testing - both serve distinct design constraints rather than acting as drop-in replacements.
Availability
R5F2122CJFP#W4 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor controllers, and smart sensor nodes requiring stable component supply across multi-year production cycles.
Supply support for R5F2122CJFP#W4 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/22 Group, including R5F2122CJFP#W4, was engineered for cost-sensitive, real-time embedded control in automotive and industrial networks - emphasizing CAN/LIN integration, analog interface capability, and robust operation across wide voltage and temperature ranges.
FAQ
What is the maximum operating frequency of the R5F2122CJFP#W4?
The R5F2122CJFP#W4 achieves a minimum instruction execution time of 50 ns when operating at 20 MHz with VCC = 3.0–5.5 V. This corresponds to a maximum system clock frequency of 20 MHz, supported by either an external crystal/resonator on XIN/XOUT or the internal high-speed on-chip oscillator with frequency adjustment.
Does the R5F2122CJFP#W4 include a hardware CAN controller?
Yes, the R5F2122CJFP#W4 integrates a single CAN 2.0B-compliant controller with 16 message slots, dedicated CTX0 (transmit) and CRX0 (receive) pins, and full mailbox management - eliminating the need for an external CAN protocol controller in compliant designs.
What is the difference between R5F2122CJFP#W4 and R5F2123CJFP#W4?
The R5F2122CJFP#W4 contains 128 KB program flash and 6 KB RAM; the R5F2123CJFP#W4 adds 2 KB of data flash (1 KB × 2 blocks) at addresses 02400h–02BFFh while retaining identical pinout, peripherals, and program memory size - making it suitable for EEPROM-emulation tasks.
Which development tools support the R5F2122CJFP#W4?
Renesas E8 and E10 emulators provide full debug support for the R5F2122CJFP#W4, including real-time trace, breakpoints, and memory inspection. The device is compatible with the HEW (High-performance Embedded Workshop) IDE and CS+ development environment for C and assembly programming.
Is the R5F2122CJFP#W4 qualified for automotive applications?
Yes, the R5F2122CJFP#W4 is a J-version part rated for -40°C to +85°C operation and belongs to Renesas' "Standard" quality grade, explicitly approved for automotive applications including body electronics, chassis systems, and infotainment interfaces per Renesas documentation.
R5F2122CJFP#W4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/2x/22
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- CANbus, 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F2122CJFP#W4 FAQ
1.How can I place an order for R5F2122CJFP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F2122CJFP#W4 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 R5F2122CJFP#W4 reliable?
The price and inventory of R5F2122CJFP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F2122CJFP#W4 is usually 5 days.
3.What payment methods are accepted for R5F2122CJFP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F2122CJFP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F2122CJFP#W4?
R5F2122CJFP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F2122CJFP#W4 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 R5F2122CJFP#W4?
For technical support, including R5F2122CJFP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F2122CJFP#W4 requirements.
6.How does Aetrix verify that R5F2122CJFP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F2122CJFP#W4 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 R5F2122CJFP#W4 meets industry standards.
7.What is the process for return or replacement of R5F2122CJFP#W4?
All R5F2122CJFP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F2122CJFP#W4, 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 R5F2122CJFP#W4 part is unused and in its original packaging.
Return procedure for R5F2122CJFP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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