Renesas R7F100GMG2DFA#BA0

Overview

R7F100GMG2DFA#BA0 from Renesas is an RL78/G23 80-pin LQFP microcontroller with 128 KB code flash, 8 KB data flash, and 16 KB RAM, operating from 1.6–5.5 V at -40 to +85°C. It delivers ultra-low power consumption (41 µA/MHz active, 210 nA data retention), integrates capacitive touch sensing (CTSU2L), a 12-bit A/D converter (26 channels), and dual D/A outputs - deployed in battery-powered consumer HMI systems requiring long runtime and robust touch interface.

For engineers reviewing the R7F100GMG2DFA#BA0 datasheet, R7F100GMG2DFA#BA0 pinout, R7F100GMG2DFA#BA0 application, or R7F100GMG2DFA#BA0 equivalent, key selection criteria include its 80-pin LQFP-0.65mm package, consumer-grade temperature range (2D), integrated CTSU2L for self/mutual capacitance sensing up to 64 keys, and support for SNOOZE mode sequencer for autonomous low-power sensor polling without CPU wake-up.

Technical Context

The R7F100GMG2DFA#BA0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (32 MHz) to 30.5 µs (32.768 kHz). Its SNOOZE mode sequencer (SMS) executes up to 32 configurable processes using 21 command types - enabling periodic analog sampling, comparator threshold checks, and CTSU2L scanning while keeping CPU, flash, and RAM powered down.

Peripheral integration includes a Logic and Event Link Controller (ELCL) for hardware-triggered signal routing between peripherals, a Data Transfer Controller (DTC) with chain transfer capability, and dual serial interfaces: up to 10-channel I²C/Simplified I²C and 6-channel UART/UARTA with LIN support - all configurable via peripheral I/O redirection register (PIOR).

Key Specifications

Pinout & Package

Package: 80-pin LQFP (14 × 14 mm, 0.65-mm pitch), RoHS-compliant, consumer-grade (2D) marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7F100GLG2DFA#BA0, the R7F100GMG2DFA#BA0 provides 20 additional GPIO and 8 more CTSU2L channels for complex HMI; versus R7F100GMH2DFA#BA0, it trades 64 KB flash and 4 KB RAM for lower cost and smaller footprint in memory-constrained consumer applications.

Availability

R7F100GMG2DFA#BA0 is available at Aetrix Electronics and suitable for smart home remotes, portable medical monitors, industrial panel meters, and wireless sensor nodes requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for R7F100GMG2DFA#BA0 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G23 product line targets ultra-low-power consumer and industrial HMI applications, integrating advanced capacitive touch sensing, flexible low-power modes, and robust peripheral sets to replace discrete touch controllers and legacy 8-bit MCUs.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time for the R7F100GMG2DFA#BA0?

The R7F100GMG2DFA#BA0 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. The device also supports ultra-low-speed operation at 32.768 kHz, where the minimum instruction time extends to 30.5 µs - enabling precise real-time clock functions while minimizing power draw. Both modes are selectable via system clock configuration registers.

Does the R7F100GMG2DFA#BA0 support hardware-accelerated capacitive touch sensing, and what configurations are available?

Yes, the R7F100GMG2DFA#BA0 integrates the CTSU2L (Capacitive Touch Sensing Unit Level 2) which provides hardware-accelerated self-capacitance (up to 32 keys on single pins) and mutual-capacitance (up to 64 keys on 8×8 matrix) sensing. It includes spread-spectrum modulation and noise cancellation logic, operates across the full 1.8–5.5 V supply range, and supports automatic baseline adjustment - all without CPU involvement. Configuration is done via dedicated CTSU2L registers and pin assignment through the PIOR.

How does the SNOOZE mode sequencer (SMS) function in the R7F100GMG2DFA#BA0, and what tasks can it perform autonomously?

The SNOOZE mode sequencer (SMS) in the R7F100GMG2DFA#BA0 executes up to 32 predefined operations using 21 distinct commands - including ADC conversions, CTSU2L scans, comparator comparisons, and timer value reads - entirely without CPU, flash, or RAM activation. It runs from the subsystem clock (32.768 kHz), consumes sub-µA current, and can trigger interrupts upon completion or condition match. This enables battery-operated devices to maintain sensor vigilance while achieving multi-year runtime.

What are the data flash endurance and background operation capabilities of the R7F100GMG2DFA#BA0?

The R7F100GMG2DFA#BA0 features 8 KB of data flash rated for 1,000,000 write/erase cycles (typical). It supports Background Operation (BGO), allowing the CPU to execute instructions from code flash while concurrently rewriting data flash - essential for reliable field firmware updates, secure parameter storage, and wear-leveling algorithms. BGO is managed via dedicated status flags and interrupt sources to ensure atomicity and prevent corruption during power loss.

Is the R7F100GMG2DFA#BA0 pin-compatible with other RL78/G23 variants in the same package, and what are the key constraints?

The R7F100GMG2DFA#BA0 is pin-compatible with all other RL78/G23 80-pin LQFP variants (e.g., R7F100GMH2DFA#BA0, R7F100GML2DFA#BA0) sharing the same #BA0 tray packaging and 0.65-mm pitch. Pin functions are identical across the family; differences lie solely in memory size and enabled peripherals - verified by the Renesas RL78/G23 datasheet Section 1.3.4 and Table 1-1. No PCB changes are required when upgrading within the same package and temperature grade.