Renesas R5F10279ANA#U5

Overview

R5F10279ANA#U5 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer and industrial applications. It integrates 12 KB code flash, 2 KB data flash, 1.5 KB RAM, a 10-bit 11-channel ADC, dual CSI/I²C serial interfaces, UART, 4-channel 16-bit TAU timer, and operates from 1.8–5.5 V at –40°C to +85°C.

For engineers reviewing the R5F10279ANA#U5 datasheet, R5F10279ANA#U5 pinout, R5F10279ANA#U5 application, or R5F10279ANA#U5 equivalent, key selection criteria include its 2 KB data flash with background operation, 2-channel DMA, CRC hardware acceleration, and support for low-voltage 1.8 V operation with HALT/STOP/SNOOZE power modes.

Technical Context

The R5F10279ANA#U5 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 1 MB address space, and configurable instruction timing (0.04167 µs min @ 24 MHz). Its clock system combines a high-accuracy ±1.0% on-chip oscillator (1–24 MHz), low-speed 15 kHz on-chip oscillator, and external crystal support (1–20 MHz).

Peripheral integration includes two Simplified SPI (CSI) channels, two Simplified I²C channels, one UART channel, 22 GPIO pins (including 2× 6-V-tolerant N-ch open-drain), key interrupt (KR0–KR9), and hardware BCD correction - all enabled within its 4 × 4 mm HWQFN-24 package with exposed die pad tied to VSS.

Key Specifications

Pinout & Package

Package: HWQFN-24, 4 × 4 mm, 0.5 mm pitch, exposed die pad (to be connected to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10278ANA#U5 and R5F10379ANA#U5, the R5F10279ANA#U5 uniquely delivers 12 KB flash headroom for field-upgradable features, 2 KB data flash for nonvolatile configuration storage, and hardware CRC for robust communication - making it optimal for connected, maintainable embedded systems.

Availability

R5F10279ANA#U5 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, consumer IoT gateways, and white goods motor control requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F10279ANA#U5 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/G12 product line was engineered for ultra-low-power, cost-sensitive general-purpose control applications - balancing rich peripheral integration, memory flexibility, and robust safety features like RAM/SFR guard and CRC acceleration.

FAQ

What is the maximum operating frequency of the R5F10279ANA#U5?

The R5F10279ANA#U5 supports a maximum system clock frequency of 24 MHz using its high-accuracy ±1.0% on-chip oscillator. When using an external crystal, the maximum main system clock frequency is 20 MHz. Instruction execution time reaches 0.04167 µs at 24 MHz, enabling real-time response in time-critical control loops. The R5F10279ANA#U5 maintains full functionality across its entire 1.8–5.5 V supply range at this speed.

Does the R5F10279ANA#U5 support in-system programming via its debug interface?

Yes, the R5F10279ANA#U5 includes an on-chip debug function compatible with Renesas E2 emulator and standard SWD/JTAG tools. It supports full flash programming, breakpoint setting, and real-time variable monitoring. However, Renesas advises against using the debug interface in mass-produced end products due to potential flash endurance impact - the R5F10279ANA#U5 is intended for development and evaluation only in that context.

How many analog input channels does the R5F10279ANA#U5 provide, and what is their resolution?

The R5F10279ANA#U5 integrates a 10-bit successive-approximation A/D converter with 11 analog input channels (ANI0–ANI3 and ANI16–ANI22). It includes internal reference voltage (1.45 V) and an on-die temperature sensor. Conversion time is 1.2 µs per sample, and the ADC supports simultaneous sampling triggers from TAU timers - critical for synchronized multi-sensor acquisition in the R5F10279ANA#U5.

Can the R5F10279ANA#U5 operate reliably at 1.8 V supply voltage?

Yes, the R5F10279ANA#U5 is fully specified for operation from 1.8 V to 5.5 V across its full temperature range (–40°C to +85°C). At 1.8 V, it supports up to 8 MHz operation in LS (low-speed) mode and maintains all peripherals including the 10-bit ADC, UART, and timers. This enables direct integration with 1.8 V logic families and extends battery life in portable applications using the R5F10279ANA#U5.

What safety or reliability features are built into the R5F10279ANA#U5?

The R5F10279ANA#U5 includes hardware-level safety features: RAM guard and SFR guard detect unintended memory corruption; CRC calculation engine accelerates protocol checksums; voltage detector offers 12 programmable reset/interrupt thresholds; and power-on-reset ensures deterministic startup. These features - confirmed in the RL78/G12 datasheet - make the R5F10279ANA#U5 suitable for industrial applications where functional safety compliance is required.