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Renesas R7FA4M1AB3CNF#BA0
- Part No.:
- R7FA4M1AB3CNF#BA0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
R7FA4M1AB3CNF#BA0.pdf
- Description:
- MCU RA4 ARM CM4 48MHZ 256K/32K Q
- Quantity:
- Payment:
- Shipping:
Inventory:4,290
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Product details
Overview
R7FA4M1AB3CNF#BA0 from Renesas Electronics is a 40-pin QFN Arm Cortex-M4 microcontroller with FPU, operating at up to 48 MHz, featuring 256-KB code flash, 32-KB SRAM, USB 2.0 Full-Speed, 14-bit ADC, and integrated capacitive touch sensing (CTSU) - deployed in industrial HMI panels requiring low-power, high-integration MCU solutions.
For engineers reviewing the R7FA4M1AB3CNF#BA0 datasheet, R7FA4M1AB3CNF#BA0 pinout, R7FA4M1AB3CNF#BA0 application, or R7FA4M1AB3CNF#BA0 equivalent, key selection criteria include its 40-pin QFN package, -40°C to +105°C temperature grade, 25 I/O pins with 2×5-V-tolerant capability, CTSU for touch buttons, and USBFS compliance with Battery Charging Specification 1.2.
Technical Context
The R7FA4M1AB3CNF#BA0 implements an Armv7E-M architecture with DSP extensions and single-precision FPU, supported by an 8-region Memory Protection Unit (MPU) and CoreSight debug infrastructure (SW-DP, ITM, DWT). Its clock system integrates HOCO (up to 48 MHz), SOSC (32.768 kHz), and CAC for real-time frequency accuracy monitoring.
Peripherals are tightly coupled via the Event Link Controller (ELC), enabling autonomous interaction between modules - e.g., ADC conversion completion triggering DMA transfer without CPU intervention. Safety is enforced through ECC on 16 KB of SRAM, IWDT with dedicated 15-kHz oscillator, and register write protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 48 MHz max - enables real-time signal processing and floating-point math for motor control or sensor fusion. |
| Memory | 256-KB code flash / 8-KB data flash / 32-KB SRAM (16 KB with ECC) - supports firmware updates, parameter storage, and runtime data buffering. |
| Analog | 14-bit ADC (11 channels), 12-bit DAC (1 channel), 2× ACMPLP, 4× OPAMP - sufficient for precision sensor interface and analog feedback loops. |
| Connectivity | USB 2.0 FS (with on-chip transceiver), 2× SCI, 1× IIC, 1× SPI, CAN, SSIE - enables host/device USB comms, multi-sensor I²C buses, and audio streaming. |
| HMI | Capacitive Touch Sensing Unit (CTSU, 10 electrodes), no SLCDC - optimized for touch-button interfaces, not segment LCD displays. |
| Package & Temp | 40-pin QFN (6 mm × 6 mm, 0.5 mm pitch), -40°C to +105°C - suitable for compact, thermally demanding industrial enclosures. |
| Power | 1.6 V to 5.5 V supply, multiple low-power modes - allows direct connection to 3.3 V or 5 V rails and battery-backed RTC operation. |
Pinout & Package
Package: 40-pin QFN (PWQN0040KC-A), 6 mm × 6 mm, 0.5 mm pitch, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply / Ground | Primary power domain (1.6–5.5 V); requires local 0.1-μF decoupling per VCC pin. |
| VBATT | Battery backup supply | Enables RTC calendar retention and wakeup during main power loss; supports coin-cell backup. |
| XTAL/EXTAL | Main crystal oscillator interface | Supports 1–20 MHz external crystals; critical for USB timing accuracy and high-precision clock sources. |
| XCIN/XCOUT | Sub-clock oscillator interface | Connects 32.768 kHz crystal for RTC calendar and low-power wake-up timing. |
| SWDIO/SWCLK | Serial Wire Debug interface | Two-pin debug port for programming, real-time trace, and non-intrusive breakpoints. |
| CTSU0/CTSU1 | Capacitive touch sensing inputs | Dedicated CTSU channels for up to 10 electrodes - enables robust touch button/slider implementation. |
| USB_VBUS/USB_DP/USB_DM | USB 2.0 Full-Speed interface | Integrated transceiver with internal regulator; VBUS detection enables BC 1.2 charging negotiation. |
| ADC0–ADC10 | Analog input channels | 11 configurable ADC inputs with selectable 12-/14-bit resolution - supports multi-sensor analog acquisition. |
Key Features
| Feature | Design Value |
|---|---|
| Secure Crypto Engine 5 (SCE5) | AES128/256 encryption + TRNG + GHASH - enables secure firmware updates and encrypted communication without software overhead. |
| Event Link Controller (ELC) | Hardware-triggered peripheral chaining - eliminates CPU polling and interrupt latency for time-critical sequences (e.g., ADC→DMA→CRC). |
| Low-Power Analog Comparators (ACMPLP) | 2× ultra-low-power comparators with programmable speed - ideal for battery-operated wake-on-threshold detection. |
| Independent Watchdog Timer (IWDT) | Dedicated 15-kHz oscillator ensures fail-safe reset even if main clock fails - critical for safety-compliant industrial control. |
| Temperature Sensor (TSN) + ADC14 | On-die thermal monitoring with 14-bit digitization - enables self-calibration and thermal derating in motor drivers or power supplies. |
Applications
| Industrial HMI Panel | Smart Sensor Node |
|---|---|
Use Scenario: Compact wall-mounted control panel with 5–10 capacitive touch buttons, USB configuration port, and real-time status LED feedback. IC Role / Device Role / Timing Role: Primary MCU executing touch scan, USB CDC communication, and LED PWM timing via GPT16 timers. Use Value: Integrated CTSU eliminates external touch controller; USBFS with BC 1.2 support enables field reconfiguration via standard USB-C cables. | Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity (via I²C), and vibration (via analog accelerometer). IC Role / Device Role / Timing Role: System controller managing low-power sleep cycles, ADC sampling bursts, and USB/SCI data upload upon threshold breach. Use Value: 1.6 V minimum operating voltage and IWDT ensure reliable operation down to depleted battery levels; TSN enables on-chip thermal compensation. |
| USB Human Interface Device | Motor Control Interface |
Use Scenario: USB HID device emulating keyboard/mouse with tactile feedback, powered directly from USB bus. IC Role / Device Role / Timing Role: USB device controller with HID descriptor handling, KINT for mechanical key scanning, and OPAMP-based haptic driver output. Use Value: On-chip USB transceiver and regulator eliminate external PHY; 5-V-tolerant I/O simplifies connection to legacy 5 V peripherals. | Use Scenario: BLDC motor gate driver interface board accepting PWM commands over SCI and providing hall-sensor feedback conditioning. IC Role / Device Role / Timing Role: Real-time PWM generator (GPT16) synchronized to hall sensor inputs (GTIU/GTIV/GTIW), with ADC current sensing and DAC reference generation. Use Value: Hardware POEG disables PWM outputs on fault; AGT timers measure hall sensor period for closed-loop speed control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R7FA4M1AB3CFM | 64-pin LQFP, 49 I/O pins, 2× SCI, 2× IIC, 2× SPI, SSIE, CTSU (24 electrodes) | Higher I/O count and audio interface support; larger footprint | Select when additional serial interfaces or audio streaming (SSIE) are required; not pin-compatible. |
| R7FA4M1AB3CNE | 48-pin QFN, 33 I/O pins, 2× SCI, 2× IIC, 1× SPI, CTSU (15 electrodes) | Intermediate I/O count and CTSU capacity; same 40-pin QFN footprint but 48-pin variant | Select when more GPIOs and CTSU channels are needed than R7FA4M1AB3CNF#BA0 offers; not pin-compatible. |
Compared with R7FA4M1AB3CNF#BA0, the R7FA4M1AB3CFM provides greater peripheral density and audio capability at the cost of board area, while R7FA4M1AB3CNE extends touch and I/O resources within a slightly larger package - neither is pin-compatible, requiring PCB redesign.
Availability
R7FA4M1AB3CNF#BA0 is available at Aetrix Electronics and suitable for industrial HMIs, smart sensor nodes, USB HID devices, and motor interface modules requiring stable component supply across extended temperature ranges.
Supply support for R7FA4M1AB3CNF#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The R7FA4M1AB3CNF#BA0 belongs to the RA4M1 group - a low-power, high-integration MCU family designed for cost-sensitive industrial HMI and sensor-edge applications with USB connectivity and capacitive touch.
FAQ
What is the maximum operating frequency of the R7FA4M1AB3CNF#BA0?
The R7FA4M1AB3CNF#BA0 features an Arm Cortex-M4 core with FPU, rated for a maximum operating frequency of 48 MHz. This speed is achievable using the high-speed on-chip oscillator (HOCO) or an external crystal up to 20 MHz with PLL multiplication. The core maintains full DSP instruction support and floating-point performance at this frequency, validated across the full -40°C to +105°C operating range.
Does the R7FA4M1AB3CNF#BA0 support USB device functionality with battery charging detection?
Yes, the R7FA4M1AB3CNF#BA0 integrates a USB 2.0 Full-Speed Module (USBFS) that operates as a device controller and complies with USB Battery Charging Specification 1.2. It includes an on-chip transceiver and LDO regulator, enabling VBUS detection and charging port identification without external components - essential for USB-powered industrial peripherals.
How many capacitive touch electrodes does the R7FA4M1AB3CNF#BA0 support via CTSU?
The R7FA4M1AB3CNF#BA0 supports up to 10 capacitive touch sensing electrodes using its integrated Capacitive Touch Sensing Unit (CTSU). This is confirmed in Table 1.14 of the datasheet, which specifies "CTSU: 10" for the R7FA4M1AB3CNF part number. Electrode count is fixed per variant and cannot be increased via firmware.
What memory protection mechanisms are implemented in the R7FA4M1AB3CNF#BA0?
The R7FA4M1AB3CNF#BA0 implements multiple memory protection layers: an 8-region Arm MPU for code/data space isolation, ECC coverage on 16 KB of SRAM for error correction, parity checking on the remaining 16 KB, flash area protection locks, and register write protection for critical control registers - collectively meeting IEC 61508 SIL2 functional safety requirements.
Is the R7FA4M1AB3CNF#BA0 pin-compatible with other RA4M1 group members?
No, the R7FA4M1AB3CNF#BA0 is not pin-compatible with other RA4M1 variants due to its unique 40-pin QFN (PWQN0040KC-A) package. The RA4M1 family shares software and peripheral compatibility but uses distinct packages: 100-pin LQFP/LGA, 64-pin LQFP/QFN, 48-pin LQFP/QFN, and 40-pin QFN. Migration requires PCB layout revision and I/O remapping.
R7FA4M1AB3CNF#BA0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 40-WFQFN Exposed Pad
- Series:
- RA4M1
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M4F
- Core Size:
- 32-Bit
- Speed:
- 48MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, SCI, SPI, UART/USART, USB
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 28
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.6V ~ 5.5V
- Data Converters:
- A/D 11x14b SAR; D/A 2x8b, 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R7FA4M1AB3CNF#BA0 FAQ
1.How can I place an order for R7FA4M1AB3CNF#BA0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R7FA4M1AB3CNF#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 R7FA4M1AB3CNF#BA0 reliable?
The price and inventory of R7FA4M1AB3CNF#BA0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R7FA4M1AB3CNF#BA0 is usually 5 days.
3.What payment methods are accepted for R7FA4M1AB3CNF#BA0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R7FA4M1AB3CNF#BA0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R7FA4M1AB3CNF#BA0?
R7FA4M1AB3CNF#BA0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R7FA4M1AB3CNF#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 R7FA4M1AB3CNF#BA0?
For technical support, including R7FA4M1AB3CNF#BA0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R7FA4M1AB3CNF#BA0 requirements.
6.How does Aetrix verify that R7FA4M1AB3CNF#BA0 is sourced from the original manufacturer or authorized distributors?
All R7FA4M1AB3CNF#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 R7FA4M1AB3CNF#BA0 meets industry standards.
7.What is the process for return or replacement of R7FA4M1AB3CNF#BA0?
All R7FA4M1AB3CNF#BA0 units undergo pre-shipment inspection (PSI). If there is an issue with R7FA4M1AB3CNF#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 R7FA4M1AB3CNF#BA0 part is unused and in its original packaging.
Return procedure for R7FA4M1AB3CNF#BA0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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