Renesas R5F103AAASP#30

Overview

R5F103AAASP#30 from Renesas Electronics is a 30-pin LSSOP RL78/G12 16-bit microcontroller designed for ultra-low-power general-purpose embedded control. It delivers 31 DMIPS at 24 MHz, features 16 KB code flash, 2 KB RAM, operates from 1.8 V to 5.5 V, and supports -40°C to +85°C ambient temperature - ideal for battery-powered sensor nodes and industrial HMI panels.

For engineers reviewing the R5F103AAASP#30 datasheet, R5F103AAASP#30 pinout, R5F103AAASP#30 application, or R5F103AAASP#30 equivalent, key selection factors include its 8-channel 16-bit TAU timer, UART/CSI serial interface configuration, absence of data flash memory, and lack of DMA controller - distinguishing it from R5F102A-series variants.

Technical Context

The R5F103AAASP#30 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.04167 µs at 24 MHz using the high-speed on-chip oscillator. Its 1 MB address space and (8-bit × 8) × 4-bank register file support efficient real-time task handling in resource-constrained systems.

It integrates an 8-channel 16-bit timer array (TAU), 8-channel 10-bit A/D converter with internal reference, and programmable clock/buzzer output - all operating within the same 1.8–5.5 V supply range and -40°C to +85°C temperature grade. No data flash, DMA, CRC, or safety guard functions are present per R5F103 product definition.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), JEDEC MS-012AC compliant, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F103AAASP#30, R5F102AAASP#30 adds data flash and safety features at higher cost and power, while R5F103A9ASP#30 reduces memory capacity to lower BOM cost - making R5F103AAASP#30 the optimal balance of performance, memory, and price for mid-tier embedded control.

Availability

R5F103AAASP#30 is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial panel controllers, portable medical monitors, and energy meter front-ends requiring stable component supply across production lifecycles.

Supply support for R5F103AAASP#30 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 was engineered for ultra-low-power general-purpose embedded control, targeting cost-sensitive, battery-operated, and industrial HMI applications where efficiency, integration, and qualification assurance are critical - precisely the domain of R5F103AAASP#30.

FAQ

What is the maximum operating frequency and associated performance of the R5F103AAASP#30?

The R5F103AAASP#30 achieves a maximum operating frequency of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. This enables real-time execution of moderate-complexity control algorithms, such as PID loops or sensor fusion, while maintaining ultra-low power consumption of 63 μA/MHz - a key advantage for battery-powered devices where both speed and efficiency matter.

Does the R5F103AAASP#30 include data flash memory?

No, the R5F103AAASP#30 does not include data flash memory. Per Renesas' RL78/G12 product differentiation, R5F103-series devices omit the 2 KB data flash found in R5F102-series counterparts. Applications requiring nonvolatile parameter storage must use external EEPROM or serial flash, or allocate code flash sectors with self-programming - noting that R5F103AAASP#30 supports flash shield window and on-chip debug functions for secure firmware updates.

What serial communication interfaces are available on the R5F103AAASP#30?

The R5F103AAASP#30 provides one UART channel (UART0), one simplified SPI (CSI) channel, and one I2C channel - all configurable via the Peripheral I/O Redirection Register (PIOR). Unlike R5F102A variants, it lacks additional CSI or I2C instances and does not support simplified I2C. These interfaces operate natively at 1.8–5.5 V logic levels, enabling direct connection to common sensors, displays, and transceivers without level shifters.

How many analog input channels does the R5F103AAASP#30 support, and what is their resolution?

The R5F103AAASP#30 integrates an 8-channel, 10-bit successive-approximation A/D converter with internal 1.45 V reference voltage. Input channels include ANI0–ANI3 and ANI16–ANI19, accessible via dedicated pins (e.g., P20–P23, P120). The ADC supports single-ended and differential modes, operates across the full 1.8–5.5 V supply range, and tolerates analog inputs up to VDD + 0.3 V - making it suitable for direct interfacing with resistive sensors, thermistors, and voltage dividers.

What low-power modes are supported by the R5F103AAASP#30, and how do they impact system design?

The R5F103AAASP#30 supports HALT, STOP, and SNOOZE low-power modes. HALT stops the CPU clock while preserving RAM and registers; STOP halts all clocks except the low-speed oscillator (15 kHz), reducing current to ~0.5 μA; SNOOZE allows background serial or timer operation during low-power wait states. These modes enable aggressive power budgeting - for example, waking every 10 seconds to sample a sensor and return to STOP mode yields average currents well below 1 μA, extending battery life in remote monitoring applications.