Renesas R7F100GLF3CFA#AA0

Overview

R7F100GLF3CFA#AA0 from Renesas is a 64-pin, industrial-grade RL78/G23 16-bit MCU with 512 KB code flash, 8 KB data flash, and 48 KB RAM, operating from 1.6–5.5 V. It delivers ultra-low power consumption (41 µA/MHz active, 210 nA data retention), integrated capacitive touch sensing (up to 64 keys), and rich peripherals including 16-bit timers (16 channels), 12-bit ADC (26 channels), UARTA (6 channels), IICA (10 channels), and RTC - deployed in smart metering and industrial HMI control systems.

For engineers reviewing the R7F100GLF3CFA#AA0 datasheet, R7F100GLF3CFA#AA0 pinout, R7F100GLF3CFA#AA0 application, or R7F100GLF3CFA#AA0 equivalent, key selection considerations include its LQFP-64 (0.65-mm pitch) package, -40°C to +105°C temperature grade, SNOOZE mode sequencer for autonomous low-power sensor polling, and hardware ELCL for event-driven peripheral coordination without CPU intervention.

Technical Context

The RL78/G23 core implements a CISC architecture with 3-stage pipeline and configurable instruction timing (0.03125 µs min @ 32 MHz high-speed oscillator or 30.5 µs @ 32.768 kHz subsystem clock). It supports multiply/divide/MAC instructions and 1 MB address space with four banks of 8×8-bit general-purpose registers.

Power management includes HALT, STOP, and SNOOZE modes; the latter uses a dedicated sequencer executing up to 32 preconfigured commands (from 21 available) to perform sensor reads, comparisons, and wake-up decisions autonomously - eliminating CPU, flash, and RAM usage during idle intervals. The ELCL enables direct hardware-level signal routing between peripherals (e.g., ADC trigger → timer capture → DMA transfer) without software overhead.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (12 × 12 mm, 0.65-mm pitch), industrial temperature grade (-40°C to +105°C), lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7F100GLF3CFA#AA0, R7F100GLL3CFA#AA0 provides 50% more code flash for complex protocol stacks without layout or driver changes, while R7F100GLK3CFA#AA0 reduces memory cost by 25% with no peripheral trade-offs - enabling scalable design families across performance tiers.

Availability

R7F100GLF3CFA#AA0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and building control systems requiring stable component supply across extended product lifecycles.

Supply support for R7F100GLF3CFA#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 targets ultra-low-power industrial and consumer applications requiring high integration, robust capacitive touch, and long-term reliability - designed specifically for battery-operated sensors, smart meters, and human-machine interfaces.

FAQ

What is the maximum operating frequency and corresponding current consumption of the R7F100GLF3CFA#AA0?

The R7F100GLF3CFA#AA0 operates up to 32 MHz using its high-speed on-chip oscillator, achieving a typical active current of 41 µA per MHz. At full 32-MHz operation, total core current is approximately 1.31 mA (excluding peripherals), verified under VDD = 3.3 V and TA = 25°C per R01DS0395EJ0140 Rev.1.40 Section 1.1.

Does the R7F100GLF3CFA#AA0 support hardware-based capacitive touch sensing, and how many keys can it handle?

Yes, the R7F100GLF3CFA#AA0 integrates the CTSU2L capacitive touch sensing unit supporting both self-capacitance (up to 32 independent keys) and mutual-capacitance (8×8 matrix = 64 keys) configurations. Electrode assignment uses shared GPIO pins like P60/P61, and noise immunity is enhanced by built-in spread-spectrum modulation and digital filtering - all documented in Section 1.1 and Figure 1-1 of the R7F100GLF3CFA#AA0 datasheet.

What debug and programming interfaces are available on the R7F100GLF3CFA#AA0?

The R7F100GLF3CFA#AA0 supports on-chip debugging via the standard 5-pin E1/E2 emulator interface (including RESET, VDD, VSS, TDI, TDO), compatible with Renesas E2 studio and CS+ IDEs. It also features ROM-based bootloader accessible through UARTA or CSI, enabling field firmware updates without debugger hardware - details are specified in Section 4.3.1 and Table 4-1 of the R01DS0395EJ0140 datasheet.

Can the R7F100GLF3CFA#AA0 operate from a single-cell Li-ion battery, and what voltage range is supported?

Yes, the R7F100GLF3CFA#AA0 operates from 1.6 V to 5.5 V, making it compatible with single-cell Li-ion (3.0–4.2 V nominal), LiFePO₄ (2.5–3.65 V), or 3×AA alkaline (3.0–4.5 V) supplies. Its POR circuit and dual LVDs (LVD0/LVD1) provide reliable reset and brownout detection across this full range - confirmed in Section 1.1 "Ultra-low power consumption technology" and electrical characteristics tables of R01DS0395EJ0140.

How does the SNOOZE mode sequencer (SMS) in the R7F100GLF3CFA#AA0 reduce system power compared to conventional sleep modes?

The SNOOZE mode sequencer (SMS) in the R7F100GLF3CFA#AA0 executes up to 32 preloaded commands (e.g., ADC read, value comparison, conditional wake) using dedicated hardware - with zero CPU, flash, or RAM activity. This achieves ~0.23 µA typical current (vs. ~1.5 µA in STOP mode with RAM retention), verified in Section 1.1 and Table 21.1 of R01DS0395EJ0140, enabling multi-year battery life in periodic sensor applications.