Renesas R5F102AAGSP#50

Overview

R5F102AAGSP#50 from Renesas Electronics is a 30-pin LSSOP packaged 16-bit RL78/G12 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 - all operating from 1.8 V to 5.5 V supply.

For engineers reviewing the R5F102AAGSP#50 datasheet, R5F102AAGSP#50 pinout, R5F102AAGSP#50 application, or R5F102AAGSP#50 equivalent, key selection criteria include its G-grade industrial temperature rating, on-chip data flash for parameter storage, CRC and RAM/SFR guard safety features, and support for background data flash rewriting during program execution.

Technical Context

The R5F102AAGSP#50 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz. Its power management includes HALT, STOP, and SNOOZE modes enabling 63 μA/MHz active current consumption, while the high-speed on-chip oscillator offers ±1.0% accuracy across –20°C to +85°C and ±2.0% up to +105°C.

It supports peripheral I/O redirection via PIOR register, enabling flexible pin assignment for UART0/1/2, CSI00/11/20, IIC00/11/20, and TAU timer channels. The device includes dedicated hardware for BCD correction, multiplier/divider/multiply-accumulator (16×16→32, 32×32→32), and window watchdog timer operable from the low-speed 15 kHz on-chip oscillator.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102AADSP#50 and R5F103AAGSP#50, the R5F102AAGSP#50 uniquely combines industrial-grade temperature operation, on-chip data flash with BGO, and hardware safety features - making it optimal for certified embedded control where reliability and field configurability are mandatory.

Availability

R5F102AAGSP#50 is available at Aetrix Electronics and suitable for industrial sensor nodes, programmable logic relays, smart home controllers, and factory automation I/O modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F102AAGSP#50 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally demanding embedded control applications - emphasizing energy efficiency, integrated safety, and design flexibility.

FAQ

What is the maximum operating frequency and instruction throughput of the R5F102AAGSP#50?

The R5F102AAGSP#50 operates at up to 24 MHz using its high-speed on-chip oscillator, achieving 31 DMIPS performance. Its minimum instruction execution time is 0.04167 μs at 24 MHz, enabled by the RL78's 3-stage pipeline CISC architecture. This throughput supports real-time control tasks including PID computation, sensor fusion, and multi-protocol communication stacks without external acceleration.

Does the R5F102AAGSP#50 support background data flash rewriting during program execution?

Yes, the R5F102AAGSP#50 supports background operation (BGO) for data flash rewriting. While the CPU executes instructions from program memory, the data flash can be rewritten - enabling seamless firmware updates, calibration storage, or logging without interrupting real-time control. This capability relies on the 2 KB on-chip data flash and is documented in the RL78 Family Data Flash Library Type04 User's Manual.

What safety features are implemented in the R5F102AAGSP#50 for industrial applications?

The R5F102AAGSP#50 includes CRC calculation hardware, RAM guard, and SFR guard - all verified in the RL78/G12 datasheet for functional safety use cases. These features detect memory corruption and unauthorized register writes, supporting diagnostic coverage required for IEC 61508 SIL2 compliance in programmable logic relays and safety-related controllers.

How does the R5F102AAGSP#50 manage power in battery-operated systems?

The R5F102AAGSP#50 achieves 63 μA/MHz active current and supports HALT, STOP, and SNOOZE low-power modes. In STOP mode, current drops to sub-μA levels while retaining RAM and register contents. Its 1.8 V minimum supply allows direct use with single-cell Li-ion or alkaline batteries, and the SNOOZE mode enables periodic wake-up for sensor polling without full CPU restart overhead.

Can the R5F102AAGSP#50 operate without an external crystal oscillator?

Yes, the R5F102AAGSP#50 can operate entirely from its high-speed on-chip oscillator, selectable from 1 MHz to 24 MHz with ±1.0% accuracy over –20°C to +85°C and ±2.0% up to +105°C. This eliminates BOM cost and board space for external crystals in applications where timing precision requirements allow - such as sensor polling, LED control, or UART communication at standard baud rates.