Renesas R5F103AAASP#V0

Overview

R5F103AAASP#V0 from Renesas Electronics is a 30-pin LSSOP packaged RL78/G12 16-bit microcontroller designed for ultra-low-power general-purpose embedded control. It features 16 KB code flash, 2 KB RAM, 1.8–5.5 V operation, 8-channel 10-bit A/D converter, and operates at up to 24 MHz with 31 DMIPS performance-enabling cost-sensitive consumer appliances, sensor nodes, and battery-powered industrial controls.

For engineers reviewing the R5F103AAASP#V0 datasheet, R5F103AAASP#V0 pinout, R5F103AAASP#V0 application, or R5F103AAASP#V0 equivalent, key selection criteria include its 30-pin LSSOP package, absence of data flash memory, single UART channel, no DMA controller, and ±5.0% high-speed on-chip oscillator accuracy over –40°C to +85°C.

Technical Context

The R5F103AAASP#V0 implements the RL78 CPU core with 3-stage CISC pipeline, 1 MB address space, and configurable peripheral I/O redirection via PIOR register. Its clock system integrates a high-speed on-chip oscillator (1–24 MHz, ±5.0% accuracy), low-speed 15 kHz on-chip oscillator, and external crystal support (X1/X2) for main system clock.

It delivers true low-power operation with HALT, STOP, and SNOOZE modes, achieving 63 μA/MHz active current. Peripheral set includes TAU timer array (8 channels), window watchdog timer, 12-bit interval timer, programmable clock/buzzer output (PCLBUZ0/PCLBUZ1), and simplified serial interfaces: one CSI channel, one UART channel, and no I²C or DMA-distinguishing it from R5F102-series variants.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3 per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102AAASP#V0, R5F103AAASP#V0 trades data flash, tighter oscillator tolerance, and safety peripherals for lower unit cost and reduced BOM complexity; versus R5F103A9ASP#V0, it offers 4 KB more flash for future firmware expansion without changing PCB layout.

Availability

R5F103AAASP#V0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and consumer IoT remotes requiring stable component supply across multi-year production cycles.

Supply support for R5F103AAASP#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G12 product line targets cost-sensitive, ultra-low-power embedded applications such as white goods, remote controls, and sensor interfaces-emphasizing energy efficiency, small footprint, and rapid time-to-market.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F103AAASP#V0?

The R5F103AAASP#V0 achieves a maximum operating frequency of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS performance. This is measured under HS (high-speed main) mode with VDD = 2.7–5.5 V. The minimum instruction execution time is 0.04167 µs at this speed, enabling real-time response in motor control and sensor processing applications.

Does the R5F103AAASP#V0 include data flash memory, and how does that affect firmware update capability?

No, the R5F103AAASP#V0 does not include data flash memory-unlike the R5F102xx series. This means it cannot perform background data writes during program execution (BGO), nor store non-volatile configuration parameters or logs internally. Firmware updates require full code flash reprogramming via on-chip debug interface or bootloader residing in protected flash sectors.

What are the key differences between R5F103AAASP#V0 and R5F102AAASP#V0 in terms of peripheral functionality?

The R5F103AAASP#V0 omits the DMA controller, CRC calculation engine, RAM guard, and SFR guard found in R5F102AAASP#V0. It also lacks the second UART and simplified I²C channels present in the R5F102 variant. These omissions reduce silicon cost and power consumption but limit high-throughput data movement and functional safety features.

Can the R5F103AAASP#V0 operate from a 1.8 V supply, and what analog features remain functional at that voltage?

Yes, the R5F103AAASP#V0 supports full operation from 1.8 V to 5.5 V. At 1.8 V, the 10-bit A/D converter remains fully functional with 8 input channels and internal 1.45 V reference voltage. The high-speed on-chip oscillator operates down to 1 MHz (±5.0%), and all GPIOs retain TTL-compatible input thresholds and 6 V-tolerant pins (P60/P61) for mixed-voltage interfacing.

How many timer output channels does the R5F103AAASP#V0 support, and what PWM capabilities are available?

The R5F103AAASP#V0 integrates an 8-channel TAU (Timer Array Unit) supporting independent timer output functions. When configured for PWM, it provides up to 7 PWM outputs (depending on PIOR settings), with adjustable duty cycle and period. These outputs can drive LEDs, fans, or gate drivers directly-no external PWM IC required-making it suitable for simple motor or lighting control tasks.