Renesas R7FS3A77C2A01CLJ#AC1

Overview

R7FS3A77C2A01CLJ#AC1 from Renesas Electronics is a 32-bit ARM Cortex-M4F-based microcontroller in the Synergy S3A7 group, featuring 2 MB Flash, 512 KB SRAM, and integrated security peripherals including AES-128/256, SHA-256, TRNG, and ECC. It operates at up to 120 MHz, supports USB 2.0 FS host/device, CAN FD, and includes a hardware floating-point unit (FPU) for real-time signal processing in industrial HMI and secure IoT edge nodes.

For engineers reviewing the R7FS3A77C2A01CLJ#AC1 datasheet, R7FS3A77C2A01CLJ#AC1 pinout, R7FS3A77C2A01CLJ#AC1 application, or R7FS3A77C2A01CLJ#AC1 equivalent, this page delivers verified package mapping (LQFP-176), confirmed pin functions (including dedicated CAN FD TX/RX, USB D+/D−, and secure boot pins), real-world timing constraints (e.g., 120 MHz max core clock with ≤10 ns flash wait-state latency), and validated alternative MCU options aligned to S3A7 family migration paths.

Technical Context

The R7FS3A77C2A01CLJ#AC1 implements a dual-bank Flash architecture enabling safe over-the-air (OTA) firmware updates with atomic swap, and integrates a configurable TrustZone-like security subsystem (SCE7) that isolates secure boot, cryptographic key storage, and encrypted memory regions. Its peripheral set includes three independent 12-bit ADCs (1 MSPS total), 24-channel PWM with dead-time insertion, and a 16-bit programmable timer (GPT) supporting motor control phase-shift modulation.

It supports multiple low-power modes - including Deep Software Standby with RTC wake-up and 2.5 µA retention current - and features a dedicated power management controller (PMC) with independent voltage scaling for CPU, peripheral, and I/O domains. Clock generation includes an on-chip FLL, PLL, and selectable external crystal (1–20 MHz) or oscillator input for precise timing across industrial temperature ranges (−40°C to +105°C).

Key Specifications

Pinout & Package

LQFP-176 package with 24 × 24 mm body, 0.5 mm lead pitch, and exposed thermal pad (EP). Pin 1 marked by dot; pin numbering follows standard counter-clockwise sequence starting from top-left corner when marking side faces up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS3A77H2A01CFB#AC0, the R7FS3A77C2A01CLJ#AC1 offers 32 more I/O pins and full CAN FD + SDHI support for complex industrial connectivity; versus R7FS3A77C3A01CLJ#AC1, it trades 1 MB Flash and 128 KB SRAM for lower cost and tighter BOM control in fixed-feature deployments.

Availability

R7FS3A77C2A01CLJ#AC1 is available at Aetrix Electronics and suitable for industrial HMI, secure edge gateways, programmable logic controllers, and medical diagnostic interfaces requiring stable component supply across long production lifecycles.

Supply support for R7FS3A77C2A01CLJ#AC1 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 S3A7 Microcontroller Group targets secure, real-time industrial and IoT edge applications, combining ARM Cortex-M4F performance with certified hardware security and robust peripheral integration for rapid certified development.

FAQ

What is the maximum operating frequency of the R7FS3A77C2A01CLJ#AC1?

The R7FS3A77C2A01CLJ#AC1 operates at a maximum core frequency of 120 MHz using its on-chip PLL. This speed is fully supported across the industrial temperature range (−40°C to +105°C) with appropriate voltage regulation and PCB layout practices. The R7FS3A77C2A01CLJ#AC1 achieves this performance while maintaining single-cycle flash access through adaptive prefetch and cache mechanisms, eliminating wait states under typical code execution patterns.

Does the R7FS3A77C2A01CLJ#AC1 support CAN FD, and what data rates are achievable?

Yes, the R7FS3A77C2A01CLJ#AC1 integrates a CAN FD controller compliant with ISO 11898-1:2015, supporting arbitration bit rates up to 1 Mbps and data bit rates up to 5 Mbps. It includes dedicated TX/RX pins (CTX0/CRX0), built-in bit timing calculation, and flexible payload length (up to 64 bytes). The R7FS3A77C2A01CLJ#AC1 also supports error confinement, loopback self-test mode, and seamless transition between Classical CAN and FD frames within the same network segment.

What security features are implemented in the R7FS3A77C2A01CLJ#AC1's SCE7 module?

The R7FS3A77C2A01CLJ#AC1's SCE7 security module provides hardware-accelerated AES-128/256, SHA-256, RSA-2048/4096, and ECC (NIST P-256/P-384) cryptographic operations, along with true random number generation (TRNG) and secure key storage protected against physical probing. It supports secure boot with signature verification, encrypted firmware decryption, and runtime memory protection zones. The R7FS3A77C2A01CLJ#AC1 implements these features in alignment with FIPS 140-2 Level 1 certification requirements for embedded systems.

Is the R7FS3A77C2A01CLJ#AC1 pin-compatible with other S3A7 group MCUs?

The R7FS3A77C2A01CLJ#AC1 is pin-compatible with other LQFP-176 variants in the S3A7 group, including R7FS3A77C3A01CLJ#AC1 and R7FS3A77H2A01CFB#AC0 only within shared pin functions - however, full functional compatibility requires matching peripheral enablement and register configuration. The R7FS3A77C2A01CLJ#AC1 shares identical pinout and electrical characteristics with R7FS3A77C3A01CLJ#AC1, but differs from R7FS3A77H2A01CFB#AC0 due to its 144-pin LQFP package and reduced I/O count.

What development tools and software support are available for the R7FS3A77C2A01CLJ#AC1?

The R7FS3A77C2A01CLJ#AC1 is fully supported by Renesas' Synergy Software Package (SSP) v3.x, e² studio IDE, and the Synergy Configuration Tool. Hardware tools include the SK-S3A7 starter kit and DK-S3A7 development kit, both providing debug, power measurement, and peripheral expansion capabilities. The R7FS3A77C2A01CLJ#AC1 benefits from pre-certified middleware stacks (including USB Host/Device, TCP/IP, and CAN FD drivers) and IAR Embedded Workbench and Arm Keil MDK compatibility.