Renesas R7FS3A17C2A01CBJ#AC0

Overview

R7FS3A17C2A01CBJ from Renesas is a 48-MHz Arm Cortex-M4 microcontroller with FPU, 1-MB code flash, 192-KB SRAM, and integrated analog peripherals including 14-bit ADC, 12-bit DAC, dual ACMPLP comparators, and four OPAMPs. It supports USB 2.0 Full-Speed with on-chip transceiver, CAN 2.0B, SDHI, QSPI, and capacitive touch sensing (CTSU), targeting industrial HMI and battery-backed metering systems.

For engineers reviewing the R7FS3A17C2A01CBJ datasheet, R7FS3A17C2A01CBJ pinout, R7FS3A17C2A01CBJ application, or R7FS3A17C2A01CBJ equivalent, key selection criteria include its 121-pin BGA package, -40°C to +85°C operating range, 1.6–5.5 V supply, ECC-protected SRAM, and integrated Segment LCD Controller (SLCDC) for low-power display interfaces.

Technical Context

This MCU implements an Armv7E-M architecture with DSP extensions and single-precision FPU, supporting deterministic real-time control via GPT32×4 and AGT×2 timers. Its memory subsystem includes 1-MB code flash with 8-KB data flash (100k P/E cycles), 192-KB SRAM split into 16-KB ECC-protected and 176-KB parity-checked regions, and Memory Mirror Function for flexible firmware load/link separation.

The peripheral set enables mixed-signal edge-node processing: USBFS with Battery Charging 1.2 compliance, CAN module with 32 mailboxes and ISO 11898-1 support, SDHI for secure removable storage, and CTSU with 27 sensor channels - all coordinated via Event Link Controller (ELC) to minimize CPU intervention in time-critical signal chains.

Key Specifications

Pinout & Package

Package: 121-pin BGA (PLBG0121JA-A), 8 mm × 8 mm, 0.65 mm pitch, RoHS-compliant Sn terminal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS3A17C2A01CBJ, the CLK variant offers higher I/O and analog channel density in LGA packaging for space-constrained HMI, while the CFB variant trades touch and display capability for extended temperature resilience in LQFP-neither is pin-compatible, requiring layout revision for migration.

Availability

R7FS3A17C2A01CBJ is available at Aetrix Electronics and suitable for industrial metering, smart home HMI, automotive body control, and portable medical devices requiring stable component supply across long product lifecycles.

Supply support for R7FS3A17C2A01CBJ 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 R7FS3A17C2A01CBJ belongs to the S3A1 Microcontroller Group-a Renesas Synergy™ platform product line designed for scalable, secure, and low-power human-machine interface and mixed-signal edge applications.

FAQ

What is the maximum operating frequency and core architecture of the R7FS3A17C2A01CBJ?

The R7FS3A17C2A01CBJ features an Arm Cortex-M4 core with Floating Point Unit (FPU), operating at a maximum frequency of 48 MHz. It implements the Armv7E-M architecture with DSP instruction set and Arm Memory Protection Unit (MPU) supporting eight protected memory regions. This configuration delivers deterministic real-time performance for control-intensive applications while maintaining energy efficiency in battery-powered systems.

Does the R7FS3A17C2A01CBJ support USB device functionality with integrated physical layer?

Yes, the R7FS3A17C2A01CBJ integrates a USB 2.0 Full-Speed Module (USBFS) with an on-chip transceiver and internal 3.3-V LDO regulator. It supports both host and device roles, complies with USB Battery Charging Specification 1.2, and provides up to 10 configurable pipes. The USBFS eliminates the need for external PHY components, reducing BOM cost and PCB area-critical for compact HMI and portable designs using the R7FS3A17C2A01CBJ.

How many analog input channels does the 14-bit ADC (ADC14) support on the R7FS3A17C2A01CBJ?

The R7FS3A17C2A01CBJ's 14-bit A/D Converter (ADC14) supports 25 analog input channels, as confirmed in Table 1.15 (Function Comparison) of the datasheet. This count is specific to the 121-pin BGA variant (R7FS3A17C2A01CBJ); other packages offer 26–28 channels. The ADC14 also supports selectable 12-/14-bit resolution modes and internal references (TSN, Vref), enabling optimization between speed and precision in sensor acquisition workflows.

What is the purpose of the Memory Mirror Function (MMF) in the R7FS3A17C2A01CBJ?

The Memory Mirror Function (MMF) in the R7FS3A17C2A01CBJ allows application code to be linked to execute from a virtual "mirror" address space (23-bit unused region), while being physically stored at any location in the 1-MB code flash. This decouples firmware load address from link address-enabling over-the-air updates, bootloader flexibility, and simplified field firmware patching without requiring recompilation or address remapping in the R7FS3A17C2A01CBJ's toolchain.

Which security features are implemented in hardware on the R7FS3A17C2A01CBJ?

The R7FS3A17C2A01CBJ integrates Renesas' Secure Crypto Engine 5 (SCE5), providing hardware-accelerated AES128/256 encryption/decryption, GHASH authentication, and True Random Number Generation (TRNG). Additional hardware security includes ECC for 16-KB SRAM, CRC calculator with snoop function, Data Operation Circuit (DOC), register write protection, and illegal memory access detection-all enforced without CPU intervention to ensure deterministic, low-latency protection in the R7FS3A17C2A01CBJ's runtime environment.