Renesas R7F100GFK3CFP#AA0

Overview

R7F100GFK3CFP#AA0 from Renesas is an RL78/G23 44-pin LQFP microcontroller with 256 KB code flash, 8 KB data flash, and 24 KB RAM, operating from 1.6–5.5 V. It integrates a 32-MHz high-accuracy on-chip oscillator (±1.0%), 12-bit A/D converter (26 channels), capacitive touch sensing unit (CTSU2L), and real-time clock - deployed in industrial human-machine interfaces requiring ultra-low power and robust peripheral integration.

For engineers reviewing the R7F100GFK3CFP#AA0 datasheet, R7F100GFK3CFP#AA0 pinout, R7F100GFK3CFP#AA0 application, or R7F100GFK3CFP#AA0 equivalent, key selection criteria include its 44-pin LQFP-0.8 mm pitch package, -40 to +105°C industrial temperature grade (C-suffix), SNOOZE mode sequencer for autonomous low-power sensing, and hardware event link controller (ELCL) enabling interrupt-free peripheral coordination.

Technical Context

The RL78/G23 core implements a CISC architecture with 3-stage pipeline and configurable instruction timing (0.03125 µs at 32 MHz or 30.5 µs at 32.768 kHz), supporting multiply/divide/accumulate operations and 1 MB address space. Its power management includes HALT, STOP, and SNOOZE modes - with 210-nA data retention current for 4 KB RAM and 41-µA/MHz active current.

Peripheral integration includes up to 16× 16-bit timers, 1× 32-bit interval timer, 1× RTC with alarm/correction, 2× 8-bit D/A converters, 2× comparators, 4–10× I²C/Simplified I²C channels, 3–6× UARTA (LIN-capable), and 3–8× Simplified SPI (CSI). The CTSU2L supports self- and mutual-capacitance sensing (up to 64 keys) with dedicated voltage reference and noise immunity features.

Key Specifications

Pinout & Package

44-pin plastic LQFP (10 × 10 mm, 0.80-mm pitch), JEDEC standard PLQP0044GC-A/GE-A footprint. Exposed pad not present. Compatible with standard reflow profiles for lead-free assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7F100GFL3CFP#AA0 and R7F100GFJ3CFP#AA0, the R7F100GFK3CFP#AA0 delivers optimal balance of memory (256 KB/24 KB), industrial temperature rating, and peripheral richness for mid-complexity HMI and control applications - avoiding over-provisioning while ensuring headroom for feature expansion.

Availability

R7F100GFK3CFP#AA0 is available at Aetrix Electronics and suitable for industrial panel meters, smart thermostats, PLC I/O modules, and motor drive controllers requiring stable component supply across extended product lifecycles.

Supply support for R7F100GFK3CFP#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, and IoT markets.

The RL78/G23 product line targets ultra-low-power industrial and consumer HMI applications, emphasizing integrated capacitive touch, autonomous peripheral sequencing, and robust mixed-signal performance in compact packages.

FAQ

What is the maximum operating frequency and accuracy of the on-chip oscillator in R7F100GFK3CFP#AA0?

The R7F100GFK3CFP#AA0 features a high-speed on-chip oscillator selectable up to 32 MHz with ±1.0% accuracy across VDD = 1.8–5.5 V and TA = -20 to +85°C. This eliminates the need for an external crystal in many industrial HMI designs while maintaining timing integrity for UART, I²C, and PWM peripherals.

Does R7F100GFK3CFP#AA0 support capacitive touch sensing, and what configurations are available?

Yes, R7F100GFK3CFP#AA0 integrates the CTSU2L capacitive touch unit supporting both self-capacitance (up to 32 keys on single pins) and mutual-capacitance (8×8 matrix = 64 keys). It operates from 1.8–5.5 V, includes internal voltage reference, and requires no external RC components - validated for industrial ESD environments per IEC 61000-4-2 Level 4.

What power modes does R7F100GFK3CFP#AA0 support, and what is its lowest retention current?

R7F100GFK3CFP#AA0 supports HALT, STOP, and SNOOZE modes. In STOP mode with 4 KB RAM retention enabled, it draws just 210 nA - verified per datasheet R01DS0395EJ0140. Wake-up from STOP occurs in ≤3.5 µs, and SNOOZE mode enables autonomous peripheral sequencing without CPU involvement.

How many serial communication interfaces does R7F100GFK3CFP#AA0 provide, and which protocols are supported?

R7F100GFK3CFP#AA0 provides up to 10 serial channels: 4–10× I²C/Simplified I²C, 3–6× UARTA (with LIN bus support), and 3–8× Simplified SPI (CSI). All are hardware-peripheral based with independent clock sources, enabling concurrent use - e.g., I²C for sensor hub, UARTA for RS-485, and CSI for display interface.

Is R7F100GFK3CFP#AA0 pin-compatible with other RL78/G23 variants in the 44-pin LQFP package?

Yes, all RL78/G23 44-pin LQFP variants - including R7F100GFF3CFP#AA0, R7F100GFG3CFP#AA0, R7F100GFH3CFP#AA0, R7F100GFJ3CFP#AA0, R7F100GFL3CFP#AA0, and R7F100GFN3CFP#AA0 - share identical pinouts and electrical characteristics. Firmware is binary-compatible across memory variants, enabling scalable design reuse.