Renesas R7F100GMG3CFA#AA0

Overview

R7F100GMG3CFA#AA0 from Renesas is an RL78/G23 80-pin industrial-grade 16-bit MCU with 128 KB code flash, 8 KB data flash, 16 KB RAM, 1.6–5.5 V operation, and ultra-low-power STOP mode (210 nA data retention). It integrates capacitive touch sensing (CTSU2L), RTC, 16-bit TAU timers, UARTA/IICA/SAU interfaces, and operates across –40 to +105°C for embedded control in smart sensors and industrial HMI.

For engineers reviewing the R7F100GMG3CFA#AA0 datasheet, R7F100GMG3CFA#AA0 pinout, R7F100GMG3CFA#AA0 application, or R7F100GMG3CFA#AA0 equivalent, key selection criteria include its 80-pin LQFP-0.65mm package, industrial temperature rating (C-grade), CTSU2L support for up to 64-key mutual-capacitance touch, and SNOOZE mode sequencer for autonomous low-power sensor polling without CPU wake-up.

Technical Context

The R7F100GMG3CFA#AA0 implements the RL78 CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 µs (32 MHz) to 30.5 µs (32.768 kHz), and includes a dedicated SNOOZE mode sequencer (SMS) capable of executing 32 sequential commands-including comparisons and calculations-without CPU, RAM, or flash activation. Its ELCL logic controller enables event-driven peripheral coordination independent of software intervention.

It features dual-voltage I/O (1.8/2.5/3.0 V compatible), configurable N-ch open-drain ports (VDD withstand), and a hardware DTC for zero-CPU data transfers triggered by interrupts. The CTSU2L unit supports both self- and mutual-capacitance methods, with dedicated analog front-end circuitry including internal reference voltage (1.48 V) and temperature sensor.

Key Specifications

Pinout & Package

Package: 80-pin plastic LQFP (14 × 14 mm, 0.65-mm pitch), RoHS-compliant, tray-packaged (#AA0).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit industrial MCU applications.

Compared with R7F100GLJ3CFA#AA0, the R7F100GMG3CFA#AA0 provides 16 more GPIOs and larger CTSU channel allocation for complex HMI, whereas R7F100GMH3CFA#AA0 offers seamless memory scalability within the same 80-pin footprint-enabling firmware evolution without board redesign.

Availability

R7F100GMG3CFA#AA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostats, PLC I/O modules, and energy meter front-ends requiring stable component supply, long-term lifecycle assurance, and industrial-temperature qualified silicon.

Supply support for R7F100GMG3CFA#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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/G23 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer HMI applications-featuring integrated capacitive touch, robust peripheral sets, and sub-microamp STOP mode operation.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time for the R7F100GMG3CFA#AA0?

The R7F100GMG3CFA#AA0 supports a maximum operating frequency of 32 MHz using the high-speed on-chip oscillator. At this speed, the minimum instruction execution time is 0.03125 µs. This timing is achievable with the high-speed on-chip oscillator set to 32 MHz and ±1.0% accuracy over VDD = 1.8–5.5 V and TA = –20 to +85°C.

Does the R7F100GMG3CFA#AA0 support hardware debugging, and what interface is used?

Yes, the R7F100GMG3CFA#AA0 supports on-chip debugging via the dedicated TOOL0 (pin 40) and TOOLRxD/TOOLTxD (pins 25/24) signals. It uses Renesas' E2 emulator interface protocol, compatible with E2 Lite and E20 debuggers, enabling full breakpoint, watchpoint, and real-time trace capabilities without requiring SWD or JTAG pins.

How many capacitive touch channels does the R7F100GMG3CFA#AA0 support in mutual-capacitance mode?

The R7F100GMG3CFA#AA0 supports up to 64 keys in mutual-capacitance mode using its CTSU2L unit configured as an 8 × 8 matrix (8 source + 8 sense lines). This capability is confirmed for the 80-pin variant and operates across the full VDD range of 1.8–5.5 V with built-in noise cancellation and auto-calibration.

What is the data flash endurance specification for the R7F100GMG3CFA#AA0, and is background operation supported?

The R7F100GMG3CFA#AA0 specifies 1,000,000 write/erase cycles (typ.) for its 8 KB data flash memory. Background operation (BGO) is fully supported: CPU code execution from program memory continues uninterrupted while data flash is being rewritten-enabling concurrent firmware updates and parameter logging.

Can the R7F100GMG3CFA#AA0 operate from a 1.8-V supply, and which I/O standards are compatible at that voltage?

Yes, the R7F100GMG3CFA#AA0 operates across 1.6–5.5 V, including 1.8 V. At 1.8 V, its I/O ports support 1.8-V, 2.5-V, and 3.0-V logic levels via configurable input thresholds and controlled-current drive capability-enabling direct interfacing with low-voltage sensors, displays, and communication ICs without level shifters.