Renesas R7FA4M3AF3CFB#BA0

Overview

R7FA4M3AF3CFB#BA0 from Renesas is a 100 MHz Arm Cortex-M33 microcontroller with 1 MB code flash, 8 KB data flash, and 128 KB SRAM (with ECC), integrated USB 2.0 Full-Speed, SDHI, QSPI, dual CAN, and Secure Crypto Engine for secure IoT edge nodes requiring real-time control, connectivity, and tamper-resistant firmware updates.

For engineers reviewing the R7FA4M3AF3CFB#BA0 datasheet, R7FA4M3AF3CFB#BA0 pinout, R7FA4M3AF3CFB#BA0 application, or R7FA4M3AF3CFB#BA0 equivalent, key selection criteria include operating temperature range (−40°C to +105°C), LQFP-144 package compatibility, TrustZone-enabled secure boot partitioning, dual 12-bit ADC units with 19 total analog inputs, and hardware-accelerated AES/RSA/ECC cryptography.

Technical Context

The R7FA4M3AF3CFB#BA0 implements Armv8-M with TrustZone, enabling strict isolation between secure and non-secure execution states across memory (flash/SRAM), peripherals, and MPU regions. Its dual-core timer architecture includes four 32-bit GPT32 channels for motor control PWM and six low-power AGT timers for wake-up event handling without CPU intervention.

Connectivity integrates two CAN 2.0B controllers (32 mailboxes each), USBFS with internal transceiver and 10-pipe endpoint support, and SDHI supporting SD/SDHC/SDXC cards in 1-/4-bit modes - all accessible via dedicated DMA channels (DMAC × 8) and event-driven transfer (ELC/DTC) to minimize CPU load.

Key Specifications

Pinout & Package

144-pin LQFP (PLQP0144KA-B), 20 mm × 20 mm, 0.5 mm pitch, exposed pad not specified. Pin count: 109 general-purpose I/O, 1 dedicated input (P200), 110 pull-up resistors, 109 N-ch open-drain outputs, 21 5-V-tolerant pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R7FA4M3AF3CFB#BA0, the R7FA4M3AF3CBM#AA0 offers identical functionality in a smaller BGA package but sacrifices 5-V tolerance and serviceability, while the R7FA6M3AF3CFB#BA0 delivers double the clock speed and memory at the cost of touch capability and higher power - making the R7FA4M3AF3CFB#BA0 optimal for balanced industrial edge nodes requiring robust I/O, security, and analog integration.

Availability

R7FA4M3AF3CFB#BA0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and automotive body electronics requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for R7FA4M3AF3CFB#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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The RA4M3 Group targets secure, high-integration microcontrollers for resource-constrained edge devices - emphasizing TrustZone-based security, analog-rich peripherals, and low-power connectivity for next-generation industrial and medical endpoints.

FAQ

What is the maximum operating frequency of the R7FA4M3AF3CFB#BA0?

The R7FA4M3AF3CFB#BA0 operates at a maximum frequency of 100 MHz using its Arm Cortex-M33 core. This speed is achieved with the on-chip PLL driven by the main clock oscillator (8–24 MHz crystal) or high-speed on-chip oscillator (HOCO). The R7FA4M3AF3CFB#BA0 maintains full peripheral functionality at this frequency, including USBFS, SDHI, and dual CAN, as verified in the R01DS0368EJ0150 datasheet Rev.1.50.

Does the R7FA4M3AF3CFB#BA0 support secure boot and firmware updates?

Yes, the R7FA4M3AF3CFB#BA0 supports hardware-enforced secure boot via Arm TrustZone and Renesas Secure Crypto Engine 9. It enables authenticated and encrypted firmware updates using background SWAP operation in code flash - allowing seamless field upgrades without interrupting real-time operation. The R7FA4M3AF3CFB#BA0 also provides tamper-detection pins and lifecycle management features to prevent unauthorized access during boot or runtime.

What package type and pin count does the R7FA4M3AF3CFB#BA0 use?

The R7FA4M3AF3CFB#BA0 uses a 144-pin LQFP package (PLQP0144KA-B), measuring 20 mm × 20 mm with 0.5 mm pitch. It provides 109 general-purpose I/O pins, 21 of which are 5-V tolerant, along with dedicated power, clock, debug, and peripheral interface pins. This package is optimized for industrial PCB assembly and manual rework, distinguishing it from the BGA variants in the same RA4M3 family.

Can the R7FA4M3AF3CFB#BA0 interface directly with USB and SD cards?

Yes, the R7FA4M3AF3CFB#BA0 integrates a USB 2.0 Full-Speed module with an internal transceiver - requiring only external 27 Ω series resistors and ESD protection on USB_DP/USB_DM. It also includes a full SD/MMC Host Interface (SDHI) supporting SD, SDHC, and SDXC cards in 1-/4-bit modes, with built-in DMA and command/response handling. Both interfaces are production-ready per the R7FA4M3AF3CFB#BA0 datasheet and require no external PHY or controller ICs.

What analog capabilities does the R7FA4M3AF3CFB#BA0 provide?

The R7FA4M3AF3CFB#BA0 includes two independent 12-bit successive approximation ADC units (ADC12) with up to 19 total analog input channels, capable of 5 Msps in interleaved mode. It also features two 12-bit DAC outputs (DAC12), an on-die temperature sensor (TSN), and dedicated analog power/ground pins (AVCC0/AVSS0, VREFH/VREFL). These resources enable high-precision sensor signal conditioning, closed-loop control, and calibration functions without external analog components.