Renesas R5F102AAGSP#V0

Overview

R5F102AAGSP#V0 from Renesas Electronics is a 30-pin LSSOP-packaged RL78/G12 16-bit microcontroller designed for low-power embedded control in industrial temperature-grade applications (–40°C to +105°C). It integrates 16 KB code flash, 2 KB data flash, 2 KB RAM, an 8-channel 10-bit A/D converter, dual UART/CSI/I²C serial interfaces, 8-channel TAU timer with PWM capability, and a 2-channel DMA controller - enabling real-time sensor monitoring and actuator control in smart meters and HVAC controllers.

For engineers reviewing the R5F102AAGSP#V0 datasheet, R5F102AAGSP#V0 pinout, R5F102AAGSP#V0 application, or R5F102AAGSP#V0 equivalent, this page delivers verified technical context, package-specific pin mapping, functional alternatives with documented differences, and supply-chain support for volume production of industrial-grade embedded systems.

Technical Context

The R5F102AAGSP#V0 implements the RL78 CPU core with a 3-stage CISC pipeline, supporting instruction execution times from 0.04167 µs (at 24 MHz high-speed on-chip oscillator) to 1 µs (at 1 MHz), and features a 1 MB address space with four banks of 8-bit general-purpose registers. Its clock system includes a ±1.0% accurate high-speed on-chip oscillator (1–24 MHz), a 15 kHz low-speed on-chip oscillator, and external crystal support up to 20 MHz via X1/X2 pins.

It embeds safety-critical peripherals exclusive to R5F102-series parts: CRC calculation unit, RAM guard, and SFR guard - alongside background operation (BGO) for data flash rewriting while executing code from program memory. The device operates across 1.8–5.5 V and supports HALT, STOP, and SNOOZE low-power modes with 63 µA/MHz active current consumption.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), JEDEC MO-153 compliant, with exposed pad not present. Pin 1 marked by index notch; REGC requires 0.47–1 µF capacitor to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102AAASP#V0, the R5F102AAGSP#V0 adds guaranteed +105°C operation and industrial qualification; compared with R5F103AAGSP#V0, it provides essential data retention, safety checking, and real-time background operations - making it the only choice for certified industrial firmware updates and functional safety subsystems.

Availability

R5F102AAGSP#V0 is available at Aetrix Electronics and suitable for smart metering, industrial motor control, building automation sensor nodes, and PLC I/O modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F102AAGSP#V0 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 applications.

The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive industrial control, sensor interfacing, and appliance applications - balancing performance, energy efficiency, and functional safety features.

FAQ

What is the maximum operating frequency of the R5F102AAGSP#V0's high-speed on-chip oscillator?

The R5F102AAGSP#V0's high-speed on-chip oscillator supports frequencies from 1 MHz to 24 MHz, with ±1.0% accuracy over –20°C to +85°C and ±2.0% over –40°C to +105°C. This allows the R5F102AAGSP#V0 to achieve 31 DMIPS at 24 MHz while maintaining timing predictability in industrial thermal environments without external crystals.

Does the R5F102AAGSP#V0 support background data flash rewriting during program execution?

Yes, the R5F102AAGSP#V0 supports background operation (BGO) for its 2 KB data flash memory. This enables the R5F102AAGSP#V0 to execute application code from program memory while simultaneously erasing or writing data flash - essential for secure firmware updates and persistent log storage in industrial field devices.

How many analog input channels does the R5F102AAGSP#V0 provide, and what is the reference voltage?

The R5F102AAGSP#V0 provides 8 analog input channels (ANI0–ANI3, ANI16–ANI19) with 10-bit resolution and an internal 1.45 V reference voltage. This eliminates the need for external reference components in precision sensing applications such as temperature monitoring and power quality analysis.

What safety features are integrated into the R5F102AAGSP#V0 that distinguish it from the R5F103 series?

The R5F102AAGSP#V0 integrates CRC calculation, RAM guard, and SFR guard - hardware safety features absent in the R5F103 series. These enable runtime memory integrity checks required for IEC 61508-compliant systems, making the R5F102AAGSP#V0 suitable for safety-critical industrial control where the R5F103AAGSP#V0 is not qualified.

Can the serial interface functions (UART/CSI/I²C) on the R5F102AAGSP#V0 be reassigned to different pins?

Yes, the R5F102AAGSP#V0 includes a Peripheral I/O Redirection Register (PIOR) that allows UART0, CSI00, and I²C00 functions to be dynamically assigned to alternate pins without modifying the PCB layout - simplifying board reuse across product variants and easing signal routing in dense industrial designs.