Renesas R5F102A7ASP#70

Overview

R5F102A7ASP#70 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 4 KB code flash, 2 KB data flash, 512 B RAM, an 8-channel 10-bit ADC, and dual serial interfaces (UART + CSI/I²C) operating at up to 24 MHz with 63 μA/MHz active current consumption.

For engineers reviewing the R5F102A7ASP#70 datasheet, R5F102A7ASP#70 pinout, R5F102A7ASP#70 application, or R5F102A7ASP#70 equivalent, this page delivers verified specifications, package mapping, functional pin roles, real-world use cases, and validated alternative parts - all aligned to Renesas' R01DS0193EJ0250 Rev.2.50 documentation.

Technical Context

The R5F102A7ASP#70 implements the RL78 CPU core with a 3-stage CISC pipeline, supporting instruction execution times from 0.04167 μs (24 MHz on-chip oscillator) to 1 μs (1 MHz), and features a 1 MB address space with four banks of 8-bit general-purpose registers. Its power architecture includes HALT, STOP, and SNOOZE modes enabled by on-chip POR, LVD (12-level selectable), and a 15 kHz low-speed oscillator.

Peripheral integration includes a 2-channel DMA controller, CRC calculation unit, RAM/SFR guard functions, and a programmable clock/buzzer output module. The device supports background operation during data flash rewriting (BGO), with 1,000,000 TYP write cycles at VDD = 1.8–5.5 V - a capability exclusive to R5F102-series parts and absent in R5F103 variants.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F102A7ASP#70, R5F102A8ASP#70 offers scalable memory headroom within identical footprint and feature set, while R5F103A7ASP#70 sacrifices data flash, safety guards, and oscillator precision to reduce unit cost - making it unsuitable for applications requiring field-updatable parameters or functional safety compliance.

Availability

R5F102A7ASP#70 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, consumer wearables, and smart lighting controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F102A7ASP#70 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 thermally constrained applications where energy efficiency, integrated peripherals, and functional safety features are essential.

FAQ

What is the maximum operating frequency and corresponding current consumption of the R5F102A7ASP#70?

The R5F102A7ASP#70 operates at up to 24 MHz using its high-speed on-chip oscillator, achieving 31 DMIPS performance. At this frequency, its typical active current is 63 μA per MHz - resulting in approximately 1.51 mA total at 24 MHz with VDD = 3.3 V and all peripherals disabled. This value scales linearly with clock speed, enabling precise power budgeting across operational modes.

Does the R5F102A7ASP#70 support in-system programming and data retention during power loss?

Yes, the R5F102A7ASP#70 supports in-system programming via its on-chip debug interface and includes 2 KB of dedicated data flash memory rated for 1,000,000 write/erase cycles. Data flash retains values across power cycles and supports background operation (BGO), allowing firmware to read/write calibration tables or event logs without halting main program execution - a key capability confirmed in R01DS0193EJ0250 Section 1.1.

What are the key differences between R5F102A7ASP#70 and R5F103A7ASP#70?

The R5F102A7ASP#70 includes 2 KB data flash, 2-channel DMA, CRC unit, RAM/SFR guard, and ±1% oscillator accuracy, while the R5F103A7ASP#70 omits all these features and has ±5% oscillator tolerance. Both share the same 30-pin LSSOP package and 4 KB code flash, but R5F102A7ASP#70 is required for applications needing persistent parameter storage, hardware safety checks, or deterministic timing-critical operations.

Which analog inputs are available on the R5F102A7ASP#70, and what reference options does its ADC support?

The R5F102A7ASP#70 provides 8 analog input channels: ANI0–ANI3 and ANI16–ANI19. Its 10-bit ADC supports three reference configurations - external AVREFP/AVREFM differential pair, internal 1.45 V reference, or VDD as reference - selectable via ADPCR register. All channels operate across the full 1.8–5.5 V supply range, enabling direct measurement of sensors powered from the same rail.

Can the R5F102A7ASP#70 drive standard 5 V logic peripherals directly?

No, the R5F102A7ASP#70 I/O pins are not 5 V tolerant except for P60 and P61 (N-ch open-drain, 6 V tolerant). All other GPIOs have absolute maximum VI of –0.3 V to VDD + 0.3 V (max 5.8 V), but safe operation requires VDD ≤ 5.5 V and input voltages ≤ VDD. To interface with 5 V peripherals, external level shifters or resistor-divider networks are required unless using P60/P61 in open-drain mode with pull-up to 5 V.