Renesas R7F101GJG4CFA#AA1

Overview

R7F101GJG4CFA#AA1 from Renesas is a 52-pin LQFP-0.65mm, 128 KB flash, 12 KB RAM RL78/G24 microcontroller featuring 48-MHz CPU operation, 50-µA/MHz ultra-low-power consumption, integrated DALI-2 and PMBus/SMBus interfaces, and hardware-based Flexible Application Accelerator (FAA) for motor control and digital power supply applications.

For engineers reviewing the R7F101GJG4CFA#AA1 datasheet, R7F101GJG4CFA#AA1 pinout, R7F101GJG4CFA#AA1 application, or R7F101GJG4CFA#AA1 equivalent, this MCU delivers deterministic real-time control with dual 12-bit ADCs (23-channel), six 16-bit timers including KB30–KB32 for PFC and multi-phase PWM, and on-chip code/data RAM for FAA co-processing - critical for lighting ballast, industrial SMPS, and DALI-compliant smart drivers.

Technical Context

The R7F101GJG4CFA#AA1 integrates an RL78 CPU core with CISC architecture and 3-stage pipeline, supporting instruction execution from 0.02083 µs (48 MHz) to 30.5 µs (32.768 kHz), plus a dedicated FAA core for 32-bit signed multiply/accumulate operations with 33-bit internal precision and limit enforcement. It uses a shared 32-byte memory region between CPU and FAA for low-latency data exchange.

Its peripheral set includes two I²C/SMBus interfaces (one PMBus-capable), one DALI-2 transceiver, up to six simplified SPIs, three UART/LIN channels, and a 32-bit interval timer with four 8-bit counter channels - all managed via Event Link Controller (ELC) for autonomous peripheral triggering without CPU intervention.

Key Specifications

Pinout & Package

52-pin plastic LQFP (10 × 10 mm, 0.65-mm pitch), JEDEC standard PLQP0052JA-A footprint, with exposed thermal pad not electrically connected. Pin functions support full peripheral remapping via PIOR registers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7F101GJE4CFA#AA1, the R7F101GJG4CFA#AA1 provides 128 KB flash for complex DALI scene programming and firmware updates, while RA2E2A20220001 lacks hardware DALI and FAA - increasing BOM cost and firmware development effort for lighting and power applications.

Availability

R7F101GJG4CFA#AA1 is available at Aetrix Electronics and suitable for digital lighting ballasts, industrial SMPS units, and smart HVAC actuators requiring stable component supply across extended product lifecycles.

Supply support for R7F101GJG4CFA#AA1 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G24 product line is engineered for high-efficiency digital power conversion and intelligent lighting control, integrating DALI-2, PMBus, and hardware-accelerated motor control features into a single ultra-low-power MCU platform.

FAQ

What is the maximum operating frequency and associated current consumption of the R7F101GJG4CFA#AA1?

The R7F101GJG4CFA#AA1 operates at up to 48 MHz with a typical active current of 50 µA/MHz, resulting in ~2.4 mA total at full speed. Its high-speed on-chip oscillator achieves ±1.0% accuracy across 1.8–5.5 V and –20°C to +85°C, eliminating need for external crystal in many applications. The R7F101GJG4CFA#AA1 also supports ultra-low-speed 32.768 kHz operation with sub-µA standby current.

Does the R7F101GJG4CFA#AA1 include hardware support for DALI-2 communication?

Yes, the R7F101GJG4CFA#AA1 integrates a complete DALI-2 transceiver with dedicated pins P50 (DALIRxD0) and P51 (DALITxD0), supporting all mandatory DALI-2 commands, bus arbitration, short-circuit protection, and thermal shutdown. No external transceiver IC is required, reducing BOM count and PCB area. The R7F101GJG4CFA#AA1 implements DALI physical layer compliance per IEC 62386-102:2014.

How does the Flexible Application Accelerator (FAA) in the R7F101GJG4CFA#AA1 improve motor control performance?

The FAA in the R7F101GJG4CFA#AA1 executes 32-bit signed multiply-accumulate operations with 33-bit internal precision and configurable limit enforcement, offloading computationally intensive tasks like Clarke/Park transforms and PI loop calculations from the main CPU. This reduces firmware latency by up to 65% and enables deterministic 100-kHz PFC control loops. The R7F101GJG4CFA#AA1 shares a 32-byte memory region between CPU and FAA for zero-copy data exchange.

What analog peripherals are available on the R7F101GJG4CFA#AA1 for power supply monitoring?

The R7F101GJG4CFA#AA1 provides a 12-bit ADC with 23 input channels, two independent sample-and-hold circuits, internal 1.48 V reference, and temperature sensor; plus three 10-bit DAC outputs (VCOUT0–VCOUT3) with 0–VDD range. These enable simultaneous sampling of AC input voltage/current, DC bus voltage, and thermal sensors - essential for real-time overvoltage, overcurrent, and overtemperature protection in SMPS designs. The R7F101GJG4CFA#AA1 also includes four comparators with selectable reference sources.

Is the R7F101GJG4CFA#AA1 pin-compatible with other RL78/G24 variants in the same package?

Yes, all RL78/G24 devices in the 52-pin LQFP-0.65mm package (e.g., R7F101GJE4CFA#AA1, R7F101GJG4CFA#AA1) share identical pinouts and electrical characteristics. Function allocation is managed via software-configurable peripheral I/O redirection registers (PIORx), allowing hardware reuse across flash variants. The R7F101GJG4CFA#AA1 maintains full mechanical and signal-level compatibility with lower-flash variants in the same package family.