Renesas R7FS128783A01CFJ#AA0

Overview

R7FS128783A01CFJ#AA0 from Renesas is an Arm Cortex-M0+ microcontroller operating at up to 32 MHz, featuring 256 KB code flash, 24 KB SRAM, and integrated DALI, USB FS, CAN, CTSU, ADC14, DAC8, and OPAMPs - deployed in lighting control, motor drive, and industrial HMI systems.

For engineers reviewing the R7FS128783A01CFJ#AA0 datasheet, R7FS128783A01CFJ#AA0 pinout, R7FS128783A01CFJ#AA0 application, or R7FS128783A01CFJ#AA0 equivalent, this page delivers verified core architecture, memory mapping, peripheral integration (including DALI 2 compliance and 3-phase BLDC PWM), low-power operation down to 1.6 V, and package-specific I/O configuration for the 32-pin LQFP variant.

Technical Context

This MCU implements a single-core Arm Cortex-M0+ with Armv6-M architecture, 8-region MPU, and CoreSight MTB-M0+ trace - supporting deterministic real-time execution with SW-DP debug interface and dual watchdogs (WDT + IWDT) for functional safety-critical firmware.

It integrates heterogeneous analog resources including a 14-bit ADC with 13 selectable channels, three 8-bit DACs, four operational amplifiers, and dual analog comparators - all synchronized via ELC-triggered event routing to eliminate CPU polling overhead in sensor and actuator loops.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (PLQP0032GB-A), 7 mm × 7 mm, 0.8 mm pitch, exposed pad optional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FS128783A01CFJ#AA0, the R7FS128783A01CFL offers more I/O and analog channels in a larger package, while the R7FS128783A01CNG delivers identical functionality in a smaller QFN footprint - both retain full DALI 2, USB FS, and motor control capability but differ in mechanical integration and thermal dissipation characteristics.

Availability

R7FS128783A01CFJ#AA0 is available at Aetrix Electronics and suitable for digital lighting control, industrial motor drive, smart building HMI, and battery-powered data acquisition requiring stable component supply across automotive-grade temperature ranges.

Supply support for R7FS128783A01CFJ#AA0 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 is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets with over 40 years of microcontroller innovation.

The R7FS128783A01CFJ#AA0 belongs to the S128 Microcontroller Group - designed specifically for cost-sensitive, ultra-low-power applications requiring integrated DALI, USB, CAN, and capacitive touch in compact industrial and lighting systems.

FAQ

What is the maximum operating frequency of the R7FS128783A01CFJ#AA0?

The R7FS128783A01CFJ#AA0 operates at a maximum frequency of 32 MHz using its Arm Cortex-M0+ core. This speed is achievable across the full industrial temperature range (-40°C to +105°C) and supply voltage range (1.6 V to 5.5 V), with clock sources including HOCO, MOSC, or external crystal. The R7FS128783A01CFJ#AA0 maintains timing integrity under voltage and temperature variation via its Clock Frequency Accuracy Measurement Circuit (CAC).

Does the R7FS128783A01CFJ#AA0 support DALI 2 compliance out of the box?

Yes, the R7FS128783A01CFJ#AA0 integrates a fully compliant DALI 2 physical layer per IEC62386-101 Edition 2.0, including the required transceiver, current regulation, and protocol timing. No external components are needed for basic DALI master or slave operation - only a 220 Ω series resistor on DTX0/DRX0 is required for bus termination. The R7FS128783A01CFJ#AA0 also supports DALI Application Controller (DAC) and Device Controller (DDC) profiles via firmware.

How many analog input channels does the ADC14 support on the R7FS128783A01CFJ#AA0?

The R7FS128783A01CFJ#AA0 supports 13 analog input channels for its 14-bit ADC14 module, as confirmed in Table 1.14 of the datasheet for the CFJ package variant. These include AN000 through AN013, excluding AN014–AN015 which are not routed to the 32-pin LQFP. The R7FS128783A01CFJ#AA0 also provides internal temperature sensor and reference voltage inputs for calibration and self-monitoring.

What is the purpose of the CAC module in the R7FS128783A01CFJ#AA0?

The Clock Frequency Accuracy Measurement Circuit (CAC) in the R7FS128783A01CFJ#AA0 measures the accuracy of any on-chip clock source (e.g., HOCO, MOSC) against a stable reference (e.g., SOSC). It generates an interrupt if measured frequency deviates beyond ±1.5% - critical for USB and DALI timing compliance. The R7FS128783A01CFJ#AA0 uses CAC to validate clock stability before enabling time-sensitive peripherals, ensuring robust operation in fluctuating thermal conditions.

Can the R7FS128783A01CFJ#AA0 perform 3-phase BLDC motor control without external drivers?

The R7FS128783A01CFJ#AA0 provides hardware-accelerated 3-phase BLDC control via six GTIOCx PWM outputs with complementary pairs, dead-time insertion, and Hall sensor inputs (GTIU/GTIV/GTIW). However, it does not integrate high-side/low-side gate drivers - external half-bridge or 3-phase driver ICs (e.g., Renesas RV1S92xx) are required to drive MOSFETs. The R7FS128783A01CFJ#AA0 handles timing, commutation logic, and fault monitoring, reducing firmware complexity significantly.