Renesas R7FS3A17C2A01CLJ#AC0

Overview

R7FS3A17C2A01CLJ#AC0 from Renesas Electronics is a 32-bit Arm Cortex-M4F microcontroller with FPU, 128 KB code flash, 16 KB SRAM, and integrated USB 2.0 FS host/device controller. It operates at up to 48 MHz, supports AES-128 encryption, and targets secure industrial HMI and sensor gateway applications requiring real-time control and connectivity.

For engineers reviewing the R7FS3A17C2A01CLJ#AC0 datasheet, R7FS3A17C2A01CLJ#AC0 pinout, R7FS3A17C2A01CLJ#AC0 application, or R7FS3A17C2A01CLJ#AC0 equivalent, key selection criteria include USB FS interface support, 48 MHz max CPU frequency, 128 KB flash with ECC, CTSU capacitive touch sensing, and QSPI interface for external memory expansion.

Technical Context

The R7FS3A17C2A01CLJ#AC0 implements an Arm Cortex-M4F core with hardware FPU and MPU, enabling deterministic floating-point math and memory protection for safety-aware firmware. It integrates a 14-bit ADC with 16 channels, 12-bit DAC, and CTSU for self-capacitive touch sensing - all synchronized via a shared peripheral bus architecture.

Its clock system includes an on-chip FLL, PLL, and multiple clock sources (HOCO, MOCO, LOCO, sub-clock, and external crystal), supporting dynamic clock switching and low-power modes (SNOOZE, DEEP-SNOOZE, STOP). USB functionality is implemented as a full-speed device/host controller with internal transceiver and dedicated DMA channel.

Key Specifications

Pinout & Package

This device is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas S3A1 Group User's Manual: Hardware.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS3A17C2A01CLJ#AC0, the R7FS3A17C3A01CLJ#AC0 offers double flash/RAM for complex firmware without layout changes, while the R7FS3A17C2A01CFB#AC0 sacrifices USB, QSPI, and I/O count for smaller size and lower cost - neither is pin-compatible, but both share identical register-level software compatibility.

Availability

R7FS3A17C2A01CLJ#AC0 is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor gateways, secure access terminals, and USB peripheral devices requiring stable component supply across production lifecycles.

Supply support for R7FS3A17C2A01CLJ#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and enterprise markets.

The Synergy S3 Series targets mid-range embedded applications demanding security, connectivity, and human interface features - designed specifically for industrial automation, building control, and IoT edge nodes where USB, touch, and cryptographic acceleration are essential.

FAQ

What is the maximum operating frequency of the R7FS3A17C2A01CLJ#AC0?

The R7FS3A17C2A01CLJ#AC0 operates at a maximum CPU frequency of 48 MHz. This is achieved using the on-chip PLL driven by the HOCO or external crystal oscillator. The core runs at this speed while peripherals like USB and QSPI maintain synchronous timing via dedicated clock dividers. All DC and AC characteristics in the datasheet are validated at this frequency under specified voltage and temperature conditions.

Does the R7FS3A17C2A01CLJ#AC0 include hardware cryptographic acceleration?

Yes, the R7FS3A17C2A01CLJ#AC0 integrates a dedicated hardware AES-128 accelerator. It supports ECB, CBC, CFB, and OFB modes with zero CPU overhead for encryption/decryption operations. Keys can be stored in protected memory regions, and the module interfaces directly with the DMAC for high-throughput data streaming - critical for secure USB CDC or TLS offload in R7FS3A17C2A01CLJ#AC0-based designs.

What USB capabilities does the R7FS3A17C2A01CLJ#AC0 support?

The R7FS3A17C2A01CLJ#AC0 features a full-speed USB 2.0 controller with integrated physical layer (PHY), supporting both device and host roles. It includes dedicated USB DMA, endpoint buffers, and descriptors for CDC, HID, and MSC classes. No external transceiver is needed. USB_DP and USB_DM pins are routed internally, and the controller complies with USB-IF certification requirements when used per Renesas hardware design guidelines for R7FS3A17C2A01CLJ#AC0.

Is the R7FS3A17C2A01CLJ#AC0 pin-compatible with other S3A1 group MCUs?

No - the R7FS3A17C2A01CLJ#AC0 is not universally pin-compatible across the S3A1 group. While it shares the same 100-pin LQFP package with some variants (e.g., R7FS3A17C3A01CLJ#AC0), differences in peripheral mapping mean certain pins serve different functions. For example, QSPI and USB signals are not present on all 100-pin variants. Always verify pin assignments against the specific variant's User's Manual: Hardware before board reuse.

What low-power modes are supported by the R7FS3A17C2A01CLJ#AC0?

The R7FS3A17C2A01CLJ#AC0 supports five low-power modes: Snooze, Deep Snooze, Sleep, Software Standby, and Stop. In Stop mode, current consumption drops to 0.5 µA (typical) with RTC and LVD active. Wake-up sources include GPIO interrupts, CTSU events, USB resume, and RTC alarms. All modes retain SRAM content and register states except Software Standby, making R7FS3A17C2A01CLJ#AC0 suitable for battery-backed industrial sensors.