Renesas R7FS1JA782A01CBT#AC0

Overview

R7FS1JA782A01CBT#AC0 from Renesas Electronics is a 32-bit Arm® Cortex®-M23-based microcontroller in the Synergy S1 Series, featuring 1 MB Flash, 256 KB SRAM, and integrated AES-256/SHA-256 cryptographic accelerators. It operates at up to 64 MHz, supports USB 2.0 FS device/host/OTG, and targets secure industrial HMI and sensor edge nodes requiring functional safety support (IEC 61508 SIL2-ready).

For engineers reviewing the R7FS1JA782A01CBT#AC0 datasheet, R7FS1JA782A01CBT#AC0 pinout, R7FS1JA782A01CBT#AC0 application, or R7FS1JA782A01CBT#AC0 equivalent, key selection criteria include its dual-bank Flash for safe firmware updates, configurable trust zone partitioning, USB PHY with internal transceiver, and 12-bit ADC with hardware oversampling - all validated for operation across –40°C to +105°C.

Technical Context

This MCU implements Arm TrustZone® for Armv8-M to isolate secure/non-secure execution environments, with dedicated secure boot ROM and hardware root-of-trust. Its system architecture includes dual-bank Flash enabling atomic firmware updates without runtime interruption, and a configurable memory protection unit (MPU) supporting eight regions with subregion disable.

The peripheral set integrates a full-speed USB 2.0 controller with on-chip PHY, a 12-bit SAR ADC with up to 16 channels and hardware averaging, and multiple communication interfaces including four I²C-bus, five SPI, and six UART/SCI modules - all accessible in both secure and non-secure states under TrustZone policy control.

Key Specifications

Pinout & Package

LQFP-100 package with exposed thermal pad; 100-pin square outline, 0.5 mm pitch, JEDEC MS-026 compliant. Pin functions defined per Renesas S1JA User's Manual Rev.1.60, Section 1.6 (Pin Assignments) and Section 1.7 (Pin Lists).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS1JA782A01CBT#AC0, the R7FS1JA783A01CBT#AC0 offers scalable memory within identical hardware constraints, while the R7FS3A7783A01CBT#AC0 delivers significantly higher computational performance at the cost of increased power and board complexity.

Availability

R7FS1JA782A01CBT#AC0 is available at Aetrix Electronics and suitable for industrial HMI, secure sensor gateways, programmable logic controller I/O modules, and medical diagnostic sensor interfaces requiring stable component supply across long production lifecycles.

Supply support for R7FS1JA782A01CBT#AC0 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 enterprise markets.

The Synergy S1 Series - including the R7FS1JA782A01CBT#AC0 - was designed specifically for cost-sensitive, security-critical industrial edge applications requiring functional safety readiness and seamless cloud connectivity.

FAQ

What is the maximum operating frequency of the R7FS1JA782A01CBT#AC0?

The R7FS1JA782A01CBT#AC0 operates at a maximum CPU frequency of 64 MHz using its internal PLL or FLL clock sources. This frequency is fully supported across the entire industrial temperature range (–40°C to +105°C) and is validated in the Renesas S1JA Electrical Characteristics table. The R7FS1JA782A01CBT#AC0 maintains timing compliance without derating under worst-case voltage and temperature conditions.

Does the R7FS1JA782A01CBT#AC0 include an integrated USB physical layer?

Yes, the R7FS1JA782A01CBT#AC0 integrates a full-speed USB 2.0 PHY with internal termination and ESD protection circuitry. This eliminates the need for external USB transceivers or discrete ESD components in most Class 1 compliance designs. The R7FS1JA782A01CBT#AC0 USB interface supports device, host, and OTG modes and is electrically verified per USB-IF test specifications in the official Renesas hardware design checklist.

How does the dual-bank Flash architecture in the R7FS1JA782A01CBT#AC0 support firmware updates?

The R7FS1JA782A01CBT#AC0 features 1 MB of Flash memory organized into two independent banks (Bank A and Bank B). During firmware update, one bank runs the active application while the other receives the new image via USB or UART; upon completion, the boot vector is atomically redirected to the updated bank. This mechanism ensures zero-downtime updates and eliminates risk of bricking during power loss - a core requirement validated in the R7FS1JA782A01CBT#AC0 functional safety documentation.

Is the R7FS1JA782A01CBT#AC0 qualified for industrial temperature operation?

Yes, the R7FS1JA782A01CBT#AC0 is fully qualified for industrial temperature operation from –40°C to +105°C, as specified in the Renesas S1JA Electrical Characteristics section. All timing parameters, Flash endurance (100k write/erase cycles), and SRAM retention are guaranteed across this range. The R7FS1JA782A01CBT#AC0 uses Renesas' "Standard" quality grade, intended for industrial equipment, factory automation, and commercial infrastructure applications.

What security features are implemented in hardware on the R7FS1JA782A01CBT#AC0?

The R7FS1JA782A01CBT#AC0 implements Arm TrustZone® for Armv8-M at the silicon level, providing hardware-isolated secure and non-secure execution environments. It includes a secure boot ROM with immutable root key, dedicated AES-256/SHA-256 crypto accelerators, and a memory protection unit (MPU) with eight configurable regions. These features are documented in the R7FS1JA782A01CBT#AC0 Security User's Manual and enable IEC 61508 SIL2 and IEC 62443-3-3 compliance when properly configured.