Renesas R7FS3A37A2A01CLK#BC0

Overview

R7FS3A37A2A01CLK#BC0 from Renesas Electronics is a 32-bit ARM Cortex-M4F-based microcontroller in the Synergy S3A3 group, featuring 2 MB flash, 384 KB SRAM, and integrated security IP including AES-256, SHA-256, TRNG, and ECC. It operates at up to 120 MHz, supports USB 2.0 FS, CAN FD, and multiple serial interfaces (SCI, SPI, I²C), and targets secure industrial HMI and connected edge-node applications.

For engineers reviewing the R7FS3A37A2A01CLK#BC0 datasheet, R7FS3A37A2A01CLK#BC0 pinout, R7FS3A37A2A01CLK#BC0 application, or R7FS3A37A2A01CLK#BC0 equivalent, key selection criteria include its dual-bank flash for safe firmware updates, hardware-accelerated crypto engine, CAN FD support with bit-rate switching, and QFP-100 package with 79 GPIOs - all verified in the official S3A3 User's Manual Rev.1.20 (Dec 2024).

Technical Context

The R7FS3A37A2A01CLK#BC0 implements a Cortex-M4F core with FPU and MPU, coupled with a multi-layer AHB/APB bus matrix enabling concurrent peripheral access. Its system architecture includes a dedicated security subsystem (SCE7) with tamper detection, secure boot ROM, and memory protection units for code/data isolation.

Peripherals include a 12-bit ADC with 24 channels and 1 µs conversion time, dual 32-bit general-purpose timers with quadrature encoder input, and a programmable 16-channel event link controller (ELC) that enables zero-latency peripheral synchronization without CPU intervention - critical for real-time motor control and sensor fusion.

Key Specifications

Pinout & Package

LQFP-100 package with exposed thermal pad; 100-pin square outline, 0.5 mm pitch, JEDEC MS-026 compliant. Pin 1 marked by dot; pin numbering counterclockwise from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS3A37A3A01CLK#AC0, the R7FS3A37A2A01CLK#BC0 reduces flash cost while retaining full CAN FD and SCE7 capability; versus R7FA4M2AD3CFM#AA0, it delivers higher real-time throughput and fieldbus compatibility at the expense of TrustZone - making R7FS3A37A2A01CLK#BC0 the preferred choice for industrial connectivity with security and timing rigor.

Availability

R7FS3A37A2A01CLK#BC0 is available at Aetrix Electronics and suitable for industrial HMI panels, secure edge gateways, motor control nodes, and smart energy meters requiring stable component supply across multi-year production cycles.

Supply support for R7FS3A37A2A01CLK#BC0 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 automotive, industrial, and enterprise markets.

The Synergy S3 Series - including the R7FS3A37A2A01CLK#BC0 - was designed specifically for secure, connected industrial edge applications requiring real-time performance, hardware-accelerated cryptography, and seamless integration with Renesas' SSP middleware stack.

FAQ

What is the maximum operating frequency of the R7FS3A37A2A01CLK#BC0?

The R7FS3A37A2A01CLK#BC0 operates at a maximum CPU frequency of 120 MHz, achieved via its internal PLL configured from either the on-chip FLL (fed by an external crystal or oscillator) or directly from an external clock source. This frequency is fully supported across the entire industrial temperature range (−40°C to +85°C) and supply voltage range (2.7–3.6 V), as validated in the S3A3 Electrical Characteristics section of the User's Manual Rev.1.20.

Does the R7FS3A37A2A01CLK#BC0 support CAN FD, and what bit rates are achievable?

Yes, the R7FS3A37A2A01CLK#BC0 integrates a CAN FD controller compliant with ISO 11898-1:2015. It supports arbitration phase bit rates up to 1 Mbps and data phase bit rates up to 5 Mbps, with automatic bit-rate switching and payload lengths up to 64 bytes. These capabilities are implemented in hardware and do not require CPU intervention - confirmed in the "CANFD Module" chapter of the S3A3 User's Manual.

What security features are included in the R7FS3A37A2A01CLK#BC0's SCE7 module?

The R7FS3A37A2A01CLK#BC0 includes the SCE7 (Security Crypto Engine 7) module, which provides hardware-accelerated AES-256 (ECB/CBC/CTR/GCM), SHA-256, RSA-2048/4096, ECC-256/384, and TRNG. It supports secure boot, key wrapping, and tamper detection via dedicated pins - all documented in the "Security Functions" section of the S3A3 User's Manual Rev.1.20 and enabled through Renesas' SSP v3.10+ security APIs.

Is the R7FS3A37A2A01CLK#BC0 pin-compatible with other S3A3 group microcontrollers?

Yes, the R7FS3A37A2A01CLK#BC0 is pin-compatible with all LQFP-100 variants in the S3A3 group (e.g., R7FS3A37A3A01CLK#AC0, R7FS3A37A2A01CBG#AC0), sharing identical pin assignments, electrical characteristics, and peripheral mappings. This allows direct substitution within the same package footprint - explicitly stated in Section 1.6 "Pin Assignments" of the S3A3 User's Manual Rev.1.20.

What development tools and software support are available for the R7FS3A37A2A01CLK#BC0?

The R7FS3A37A2A01CLK#BC0 is fully supported by Renesas' Synergy Software Package (SSP) v3.10+, e2 studio IDE, and the Synergy Development Environment. Hardware tools include the SK-S3A3 starter kit and DK-S3A3 development kit - all providing validated BSPs, HAL drivers, and example projects for USB, CAN FD, crypto, and motor control. Documentation and downloads are hosted at renesassynergy.com/ssp and renesassynergy.com/tools.