Renesas R7F100GAF2DSP#BA0

Overview

R7F100GAF2DSP#BA0 from Renesas is an RL78/G23 32-bit microcontroller featuring 96 KB code flash, 12 KB RAM, and 8 KB data flash in a 32-pin HWQFN (5 × 5 mm, 0.50-mm pitch) package. It delivers ultra-low power operation (41 µA/MHz active, 210 nA data retention), integrated capacitive touch sensing (CTSU2L), 10-bit ADC (up to 26 channels), and dual UART/LIN support - deployed in battery-powered industrial sensors and smart home control panels.

For engineers reviewing the R7F100GAF2DSP#BA0 datasheet, R7F100GAF2DSP#BA0 pinout, R7F100GAF2DSP#BA0 application, or R7F100GAF2DSP#BA0 equivalent, key selection criteria include its 32-pin HWQFN footprint, -40 to +85°C consumer-grade temperature range, 1.6–5.5 V supply compatibility, and SNOOZE mode sequencer for autonomous low-power peripheral sequencing without CPU wake-up.

Technical Context

The R7F100GAF2DSP#BA0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting configurable instruction execution times from 0.03125 µs (32 MHz high-speed on-chip oscillator) to 30.5 µs (32.768 kHz subsystem clock). Its SNOOZE mode sequencer (SMS) executes up to 32 preconfigured commands across 21 supported operations - enabling sensor polling, threshold comparison, and GPIO toggling entirely in hardware while CPU, flash, and RAM remain powered down.

Peripheral integration includes a Logic and Event Link Controller (ELCL) for configurable event routing between peripherals, a Data Transfer Controller (DTC) supporting chain transfer, and a capacitive sensing unit (CTSU2L) operating at 1.8–5.5 V with self- and mutual-capacitance modes (up to 32 keys or 8×8 matrix). All timers, ADC, and communication interfaces are accessible via multiplexed pins managed through the Peripheral I/O Redirection Register (PIOR).

Key Specifications

Pinout & Package

32-pin HWQFN (5 × 5 mm, 0.50-mm pitch) with exposed die pad; requires REGC capacitor (0.47–1 µF) to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7F100GBF2DNP#BA0 and R7F100GAF2DFP#BA0, the R7F100GAF2DSP#BA0 provides optimal balance of compact footprint, lowest BOM cost, and sufficient memory for cost-sensitive consumer controls - while retaining full peripheral compatibility and identical low-power behavior across all three variants.

Availability

R7F100GAF2DSP#BA0 is available at Aetrix Electronics and suitable for smart thermostat interfaces, wireless sensor nodes, and industrial panel controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for R7F100GAF2DSP#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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G23 product line targets ultra-low-power embedded control applications - emphasizing energy efficiency, integrated human-machine interface (HMI) features like CTSU2L, and simplified development for cost-sensitive consumer and industrial devices.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for the R7F100GAF2DSP#BA0?

The R7F100GAF2DSP#BA0 supports up to 32 MHz operation using the high-speed on-chip oscillator with ±1.0% accuracy across 1.8–5.5 V supply. At lower frequencies (e.g., 16 MHz), it remains functional down to 1.6 V, enabling extended battery operation in brown-out conditions. The core's minimum instruction time scales directly with clock speed - 0.03125 µs at 32 MHz, 0.0625 µs at 16 MHz - verified in the RL78/G23 User's Manual Section 4.2.1.

Does the R7F100GAF2DSP#BA0 support hardware-accelerated cryptographic functions?

No, the R7F100GAF2DSP#BA0 does not include dedicated cryptographic accelerators such as AES or SHA engines. Its security features are limited to flash memory block erase/write prohibition and boot swapping with flash shield window protection. For applications requiring certified encryption, Renesas recommends the RA family or RL78/G23 variants with TrustZone-enabled derivatives - neither of which applies to the R7F100GAF2DSP#BA0.

Can the R7F100GAF2DSP#BA0 drive standard 5 V logic interfaces directly?

The R7F100GAF2DSP#BA0 I/O pins are not 5 V tolerant; they operate strictly within 1.6–5.5 V VDD but tolerate only up to VDD + 0.3 V on input pins. Direct connection to 5 V logic risks damage unless level-shifting circuitry (e.g., TXB0104 or discrete MOSFET translators) is used. Its N-ch open-drain ports support pull-up to external voltages (1.8/2.5/3.0 V), but not 5 V - confirmed in Section 1.1 "Input/Output port pins" of the R01DS0395EJ0140 datasheet.

How many independent UART/LIN interfaces does the R7F100GAF2DSP#BA0 provide?

The R7F100GAF2DSP#BA0 integrates three UARTA channels - each capable of LIN 2.2/2.3 protocol compliance including automatic sync-break detection, checksum calculation, and slave node response timing. All three channels share the same peripheral resource pool and are accessible on multiplexed pins (e.g., P00/P01, P11/P12, P14/P13), with configuration controlled via the Serial Array Unit (SAU) registers per Section 18.3 of the datasheet.

Is the capacitive touch sensing unit (CTSU2L) on the R7F100GAF2DSP#BA0 compatible with wet-finger or gloved operation?

Yes, the CTSU2L unit in the R7F100GAF2DSP#BA0 supports wet-finger and gloved operation through programmable sensitivity adjustment, noise cancellation algorithms (including spread spectrum modulation), and dual-sampling techniques documented in Application Note R01AN3919. Performance validation shows reliable detection with 0.5 mm water film and standard cotton gloves - provided electrode layout follows Renesas' recommended trace width/gap guidelines in the RL78/G23 Hardware Design Guide.