Renesas R5F102A8DSP#V0

Overview

R5F102A8DSP#V0 from Renesas Electronics is a 30-pin LSSOP packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer-grade applications (–40°C to +85°C). It integrates 8 KB code flash, 2 KB data flash, 512 B RAM, a 10-bit 8-channel ADC, and dual UART/CSI/I²C serial interfaces - enabling compact sensor node and appliance control designs with background data flash rewriting capability.

For engineers reviewing the R5F102A8DSP#V0 datasheet, R5F102A8DSP#V0 pinout, R5F102A8DSP#V0 application, or R5F102A8DSP#V0 equivalent, key selection criteria include its 2-channel DMA support, CRC hardware accelerator, on-chip 1–24 MHz high-accuracy oscillator (±1.0% at –20 to +85°C), and 63 μA/MHz active power consumption - all within a 7.62 mm × 4.4 mm LSSOP30 package.

Technical Context

The R5F102A8DSP#V0 implements the RL78 CPU core with a 3-stage CISC pipeline, 1 MB address space, and configurable instruction timing (0.04167 μs min @ 24 MHz). Its peripheral set includes an 8-channel TAU timer unit with PWM output capability, a 12-bit interval timer, and a window watchdog timer - all synchronized to the selectable high-speed on-chip oscillator or external crystal (1–20 MHz).

Power management features include HALT, STOP, and SNOOZE modes, on-chip POR/LVD with 12-level voltage detection, and regulator capacitor support via REGC pin. The device supports self-programming of code flash and background operation (BGO) for data flash writes - critical for field firmware updates without halting real-time tasks.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant, tray-packaged (#V0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102A7DSP#V0 and R5F103A8DSP#V0, the R5F102A8DSP#V0 delivers optimal balance of memory headroom, hardware acceleration (CRC/DMA), and timing precision - making it the preferred choice for next-generation consumer and industrial edge nodes requiring field-upgradable firmware and robust communication integrity.

Availability

R5F102A8DSP#V0 is available at Aetrix Electronics and suitable for smart home sensors, appliance control panels, and industrial HMI interfaces requiring stable component supply across multi-year production cycles.

Supply support for R5F102A8DSP#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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G12 product line targets ultra-low-power general-purpose embedded control, emphasizing energy efficiency, integrated safety features, and rapid development through unified toolchains and scalable memory/peripheral configurations.

FAQ

What is the maximum operating frequency of the R5F102A8DSP#V0?

The R5F102A8DSP#V0 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator. When using an external crystal (X1/X2), the maximum main system clock is 20 MHz. Instruction execution time ranges from 0.04167 μs (at 24 MHz) to 1 μs (at 1 MHz), configurable per application power/performance needs. This flexibility allows the R5F102A8DSP#V0 to operate efficiently across diverse embedded workloads.

Does the R5F102A8DSP#V0 support in-system programming (ISP)?

Yes, the R5F102A8DSP#V0 supports full in-system programming via its on-chip debug interface using standard Renesas E2 emulator or compatible tools. It includes flash shield window functionality and self-programming capability for both code flash and 2 KB data flash - enabling secure firmware updates and field calibration without removing the device from the PCB.

What are the analog input capabilities of the R5F102A8DSP#V0?

The R5F102A8DSP#V0 integrates a 10-bit successive approximation register (SAR) ADC with 8 input channels (ANI0–ANI3, ANI16–ANI19), internal 1.45 V reference voltage, and dedicated AVREFP/AVREFM pins for differential measurement. It operates across the full 1.8–5.5 V supply range, supporting ratiometric sensing and direct connection to resistive sensors or thermistors without external signal conditioning.

How does the R5F102A8DSP#V0 manage power in battery-operated applications?

The R5F102A8DSP#V0 provides three ultra-low-power modes: HALT (CPU stopped, peripherals active), STOP (all clocks halted except LSI), and SNOOZE (selected peripherals active while CPU sleeps). With 63 μA/MHz active current and sub-μA STOP-mode consumption, it extends battery life in intermittent-sensing applications - such as wireless sensor nodes - while maintaining fast wake-up response (< 4 μs from HALT mode).

Is the R5F102A8DSP#V0 pin-compatible with other RL78/G12 variants in the same package?

Yes, all 30-pin LSSOP RL78/G12 devices - including R5F102A7DSP#V0, R5F102A9DSP#V0, and R5F103A8DSP#V0 - share identical pinouts and mechanical footprint. However, peripheral availability (e.g., data flash, DMA, CRC) and electrical specifications (oscillator accuracy, max frequency) differ between R5F102x and R5F103x families, so firmware and schematic design must be verified per specific part number.