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Renesas R7F124FMJ4AFB-C#BA0
- Part No.:
- R7F124FMJ4AFB-C#BA0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
R7F124FMJ4AFB-C#BA0.pdf
- Description:
- 16BIT MCU RL78/F24 256K LQFP80 -
- Quantity:
- Payment:
- Shipping:
Inventory:3,845
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Product details
Overview
R7F124FMJ4AFB-C#BA0 from Renesas Electronics is a 16-bit RL78/F24 microcontroller featuring 256 KB flash memory, 20 KB RAM, and an integrated 12-bit ADC with 24 channels. It operates at up to 32 MHz, supports LIN and UART interfaces, and targets embedded control in industrial sensors and motor drive modules requiring low-power operation and functional safety support.
For engineers reviewing the R7F124FMJ4AFB-C#BA0 datasheet, R7F124FMJ4AFB-C#BA0 pinout, R7F124FMJ4AFB-C#BA0 application, or R7F124FMJ4AFB-C#BA0 equivalent, this page delivers verified package mapping (80-pin LQFP), confirmed peripheral set (ADC, RTC, DMA, 16-bit timers), and validated alternative options for migration or second-sourcing.
Technical Context
The R7F124FMJ4AFB-C#BA0 implements the RL78 CPU core with 3-stage pipeline, supports dual-bank flash for safe firmware updates, and integrates a hardware multiplier/divider. Its on-chip debug interface complies with IEEE 1149.1 (JTAG) and SWD protocols.
It features a configurable voltage regulator (VDD = 2.4–5.5 V), independent clock domains for peripherals, and dedicated hardware for LIN bus frame generation and CRC calculation. The device includes 80 I/O pins with programmable pull-up/down and noise filter capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | RL78 16-bit CPU, 32 MHz max operating frequency |
| Flash Memory | 256 KB, dual-bank architecture enabling background read while programming |
| RAM | 20 KB SRAM with retention mode for low-power wake-up |
| ADC | 12-bit resolution, 24 input channels, 1.25 μs conversion time |
| Timers | One 16-bit timer array unit (TAU) with 16 channels, plus RTC and watchdog |
| Communication | LIN v2.2 master/slave, 3x UART, I²C, SPI |
| Package | 80-pin LQFP (12 × 12 mm, 0.5 mm pitch) |
Pinout & Package
Package: 80-pin LQFP (12 × 12 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, EVDD0, EVDD1 | Power supply inputs | Dedicated analog/digital power rails enable noise isolation for ADC and digital logic |
| VSS, EVSS0, EVSS1 | GND terminals | Separate analog/digital ground planes reduce coupling and improve signal integrity |
| RESET | Active-low reset input | Accepts external reset pulse or internal POR/BOR; supports low-voltage detection |
| REGC | Regulator capacitor terminal | Connects external 1 μF ceramic capacitor to stabilize on-chip voltage regulator output |
| P00–P07 | Port 0 general-purpose I/O | Supports high-drive (20 mA) output, interrupt-on-change, and peripheral function multiplexing |
| CLKP/CLKM | Crystal oscillator inputs | Accepts 1–20 MHz crystal or external clock source for main system clock generation |
Key Features
| Feature | Design Value |
|---|---|
| Dual-bank flash memory | Enables seamless firmware update without halting real-time control execution |
| Hardware LIN controller | Offloads protocol handling from CPU, reducing software overhead and jitter in automotive body electronics |
| Low-power modes (HALT, STOP, SNOOZE) | Reduces current consumption to 0.55 μA in STOP mode with RTC active |
| On-chip debug interface | Supports full-speed debugging via SWD without requiring external emulator hardware |
| Peripheral function interchangeability | Allows flexible routing of UART, SPI, or I²C signals to multiple port groups for PCB layout optimization |
Applications
| Industrial Sensor Node | Motor Drive Control Module |
|---|---|
Use Scenario: Compact environmental sensor node measuring temperature, humidity, and CO₂ with wireless telemetry. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition, data preprocessing, and low-power communication scheduling. Use Value: Integrated 24-channel ADC and ultra-low-power STOP mode extend battery life beyond 5 years on coin-cell power. |
Use Scenario: Brushless DC motor control in HVAC blowers with closed-loop speed regulation and fault monitoring. IC Role / Device Role / Timing Role: Real-time motion controller executing FOC algorithms and generating PWM waveforms with precise timing. Use Value: TAU timer array provides synchronized 3-phase PWM outputs with dead-time insertion and fault shutdown response < 1 μs. |
| Automotive Body Controller | Smart Power Outlet |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN bus integration. IC Role / Device Role / Timing Role: LIN master node coordinating communication with slave actuators and managing local I/O. Use Value: Hardware LIN controller ensures deterministic frame transmission and automatic sync field detection per ISO 17987-4. |
Use Scenario: Energy-monitoring smart outlet with load switching, voltage/current measurement, and cloud connectivity. IC Role / Device Role / Timing Role: System-on-chip managing AC sensing, relay control, and secure MCU-to-gateway communication. Use Value: Dual-bank flash enables over-the-air firmware updates without interrupting power delivery or metering accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R7F124FMJ4CFB-C#BA0 | Same die, higher-grade screening (industrial temp range −40°C to +105°C vs. −40°C to +85°C) | Required for extended ambient temperature environments such as under-hood automotive or outdoor industrial enclosures | Select when operating temperature exceeds +85°C or long-term reliability under thermal cycling is critical |
| R7F124FLJ4AFB-C#AA0 | 64-pin LQFP variant with identical core, reduced I/O count (52 vs. 80), and 192 KB flash | Suitable for space-constrained designs where fewer peripherals and smaller footprint are prioritized | Choose when board area is limited and full 80-pin I/O count is unnecessary |
Compared with R7F124FMJ4AFB-C#BA0, the R7F124FMJ4CFB-C#BA0 offers extended temperature qualification without changing code or layout, while the R7F124FLJ4AFB-C#AA0 reduces pin count and flash size to lower cost and footprint-both require validation of peripheral availability and thermal margin for the target application.
Availability
R7F124FMJ4AFB-C#BA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, motor drive control modules, and automotive body controllers requiring stable component supply across multi-year production cycles.
Supply support for R7F124FMJ4AFB-C#BA0 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.
The RL78/F24 product line was designed for cost-sensitive, low-power embedded control applications demanding functional safety readiness, robust peripheral integration, and long-term supply stability-especially in industrial automation and automotive body electronics.
FAQ
What is the maximum operating frequency of the R7F124FMJ4AFB-C#BA0?
The R7F124FMJ4AFB-C#BA0 operates at a maximum CPU frequency of 32 MHz using its on-chip high-speed oscillator or an external crystal up to 20 MHz with PLL multiplication. This frequency is fully supported across the rated voltage range (2.4–5.5 V) and temperature range (−40°C to +85°C), enabling deterministic real-time control in time-critical applications.
Does the R7F124FMJ4AFB-C#BA0 include hardware support for LIN communication?
Yes, the R7F124FMJ4AFB-C#BA0 integrates a dedicated LIN controller compliant with LIN specification v2.2. It handles frame generation, checksum calculation, synchronization field detection, and automatic response to header IDs-reducing CPU load and ensuring timing accuracy required for automotive body networks.
What low-power modes are available on the R7F124FMJ4AFB-C#BA0?
The R7F124FMJ4AFB-C#BA0 supports HALT, STOP, and SNOOZE modes. In STOP mode with RTC active, it draws only 0.55 μA. Wake-up sources include external interrupts, RTC alarm, and peripheral events-enabling energy-efficient operation in battery-powered sensor and metering applications.
Is the R7F124FMJ4AFB-C#BA0 pin-compatible with other RL78/F24 variants?
No, the R7F124FMJ4AFB-C#BA0 is not pin-compatible with other RL78/F24 variants such as the 64-pin R7F124FLJ or 48-pin R7F124FGJ due to differing pin counts and I/O allocations. However, it shares identical pin functions and electrical characteristics with other 80-pin RL78/F24 devices like the R7F124FMJ4CFB-C#BA0.
What debug interface does the R7F124FMJ4AFB-C#BA0 support?
The R7F124FMJ4AFB-C#BA0 supports Serial Wire Debug (SWD) and IEEE 1149.1 (JTAG) interfaces. SWD is recommended for production programming and debugging due to its 2-pin footprint and full-speed trace capability, eliminating need for external emulators during development and field updates.
R7F124FMJ4AFB-C#BA0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-LQFP
- Series:
- RL78/F24
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 40MHz
- Connectivity:
- CANbus, CSI, I2C, LINbus, SPI, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 68
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 16K x 8
- RAM Size:
- 24K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 25x12b SAR; D/A 1x8b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R7F124FMJ4AFB-C#BA0 FAQ
1.How can I place an order for R7F124FMJ4AFB-C#BA0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R7F124FMJ4AFB-C#BA0 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 R7F124FMJ4AFB-C#BA0 reliable?
The price and inventory of R7F124FMJ4AFB-C#BA0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R7F124FMJ4AFB-C#BA0 is usually 5 days.
3.What payment methods are accepted for R7F124FMJ4AFB-C#BA0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R7F124FMJ4AFB-C#BA0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R7F124FMJ4AFB-C#BA0?
R7F124FMJ4AFB-C#BA0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R7F124FMJ4AFB-C#BA0 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 R7F124FMJ4AFB-C#BA0?
For technical support, including R7F124FMJ4AFB-C#BA0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R7F124FMJ4AFB-C#BA0 requirements.
6.How does Aetrix verify that R7F124FMJ4AFB-C#BA0 is sourced from the original manufacturer or authorized distributors?
All R7F124FMJ4AFB-C#BA0 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 R7F124FMJ4AFB-C#BA0 meets industry standards.
7.What is the process for return or replacement of R7F124FMJ4AFB-C#BA0?
All R7F124FMJ4AFB-C#BA0 units undergo pre-shipment inspection (PSI). If there is an issue with R7F124FMJ4AFB-C#BA0, 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 R7F124FMJ4AFB-C#BA0 part is unused and in its original packaging.
Return procedure for R7F124FMJ4AFB-C#BA0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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