Renesas R7FS124773A01CNF#AC0

Overview

R7FS124773A01CNF#AC0 from Renesas is an ultra-low-power 32-MHz Arm® Cortex-M0+ microcontroller with 128-KB code flash, 16-KB SRAM, USB 2.0 Full-Speed (with BC 1.2), CAN 2.0B, 14-bit ADC (14 channels), 12-bit DAC, CTSU for capacitive touch, and AES128/256 encryption - deployed in industrial HMI control panels requiring secure, low-power, mixed-signal operation.

For engineers reviewing the R7FS124773A01CNF#AC0 datasheet, R7FS124773A01CNF#AC0 pinout, R7FS124773A01CNF#AC0 application, or R7FS124773A01CNF#AC0 equivalent, key selection considerations include its 40-pin QFN package (7 mm × 7 mm, 0.5 mm pitch), –40°C to +105°C operating range, integrated USB transceiver with LDO, dual watchdog timers (WDT/IWDT), and CAC-based clock accuracy monitoring for fail-safe timing validation.

Technical Context

This MCU implements a single-core Arm Cortex-M0+ (Armv6-M, r0p1-00rel0) with SysTick timer driven by LOCO or ICLK, supporting up to 32 MHz operation. Its memory subsystem includes 128-KB code flash with area protection, 4-KB data flash (100,000 erase/write cycles), and 16-KB SRAM with parity error detection.

The peripheral architecture integrates event-driven autonomy via ELC and DTC, enabling CPU-free inter-module communication and data transfers. Safety is enforced through SRAM parity checks, register write protection, independent clock monitoring (CAC), CRC calculator, and DOC for deterministic 16-bit arithmetic - all validated for industrial temperature operation.

Key Specifications

Pinout & Package

Package: 40-pin QFN (PWQN0040KC-A), 7 mm × 7 mm, 0.5 mm pitch, exposed thermal pad (to be connected to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS124773A01CNE#AC0 and R7FS124773A01CFM#AC0, the R7FS124773A01CNF#AC0 offers the smallest footprint and lowest I/O count while retaining full USBFS, CAN, CTSU, and security features - making it optimal for space-constrained, cost-sensitive industrial edge nodes where 26 GPIOs suffice.

Availability

R7FS124773A01CNF#AC0 is available at Aetrix Electronics and suitable for industrial HMI control panels, smart sensor nodes, motor drive interface modules, secure firmware update gateways, and low-power CAN/USB field devices requiring stable component supply across extended temperature ranges.

Supply support for R7FS124773A01CNF#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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The R7FS124773A01CNF#AC0 belongs to the S124 Microcontroller Group - designed specifically for ultra-low-power, secure, mixed-signal industrial edge devices requiring integrated USB, CAN, capacitive touch, and functional safety features.

FAQ

What is the maximum operating frequency and core architecture of the R7FS124773A01CNF#AC0?

The R7FS124773A01CNF#AC0 operates at a maximum frequency of 32 MHz and uses the Arm Cortex-M0+ core based on the Armv6-M architecture (revision r0p1-00rel0). It includes a single-cycle integer multiplier and SysTick timer driven by LOCO or ICLK. This architecture delivers efficient real-time performance with ultra-low power consumption, making the R7FS124773A01CNF#AC0 ideal for battery-operated and thermally constrained industrial applications.

Does the R7FS124773A01CNF#AC0 support USB Battery Charging Specification 1.2?

Yes, the R7FS124773A01CNF#AC0 integrates a USB 2.0 Full-Speed module (USBFS) compliant with USB Battery Charging Specification 1.2. Its on-chip USB transceiver is powered by an internal LDO regulator that generates 3.3 V from 5-V VBUS, enabling direct USB-powered operation without external regulators. This capability is confirmed in the R01DS0264EU0140 datasheet section 24 and applies specifically to the R7FS124773A01CNF#AC0 variant.

What analog peripherals are included in the R7FS124773A01CNF#AC0?

The R7FS124773A01CNF#AC0 includes a 14-bit successive approximation ADC (ADC14) with up to 14 selectable input channels, a 12-bit DAC (DAC12) with output amplifier, two low-power analog comparators (ACMPLP), and an on-die temperature sensor (TSN). These peripherals are fully supported in the 40-pin QFN package and enable high-precision sensor acquisition, analog output generation, and thermal monitoring - all without external signal conditioning components.

How many I/O pins does the R7FS124773A01CNF#AC0 provide, and what are their voltage tolerances?

The R7FS124773A01CNF#AC0 provides 26 general-purpose I/O pins in its 40-pin QFN package, with 2 pins rated for 5-V tolerance and 11 N-channel open-drain outputs. It also includes 3 dedicated input-only pins and supports internal pull-up resistors on all 26 I/Os. This I/O configuration is explicitly documented in Table 1.12 of the R01DS0264EU0140 datasheet for the PWQN0040KC-A package variant of the R7FS124773A01CNF#AC0.

What safety and security features are implemented in the R7FS124773A01CNF#AC0?

The R7FS124773A01CNF#AC0 implements SRAM parity error checking, flash area protection, ADC self-diagnosis, Clock Frequency Accuracy Measurement Circuit (CAC), Cyclic Redundancy Check (CRC) calculator, Data Operation Circuit (DOC), Port Output Enable for GPT (POEG), Independent Watchdog Timer (IWDT), GPIO readback level detection, register write protection, and main oscillator stop detection. It also includes AES128/256 encryption and a True Random Number Generator (TRNG), meeting foundational requirements for IEC 60730 Class B compliance and secure firmware operations.