Renesas R5F102A7DSP#V0

Overview

R5F102A7DSP#V0 from Renesas Electronics is a 30-pin LSSOP-packaged RL78/G12 16-bit MCU 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, 8-channel 10-bit ADC, and dual UART/CSI/I²C serial interfaces - enabling compact sensor node and appliance control designs with background data flash rewriting.

For engineers reviewing the R5F102A7DSP#V0 datasheet, R5F102A7DSP#V0 pinout, R5F102A7DSP#V0 application, or R5F102A7DSP#V0 equivalent, key selection criteria include its 2 KB on-chip data flash with 1M-cycle endurance, 2-channel DMA support, CRC hardware accelerator, and 1.8–5.5 V single-supply operation with HALT/STOP/SNOOZE low-power modes.

Technical Context

The R5F102A7DSP#V0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.04167 µs (24 MHz high-speed on-chip oscillator) to 1 µs (1 MHz). Its clock system combines a ±1.0% accurate 1–24 MHz high-speed on-chip oscillator with external crystal support (1–20 MHz) and a 15 kHz low-speed on-chip oscillator for watchdog and interval timing.

Peripheral integration includes an 8-channel TAU timer unit with PWM capability, SAU0 with 4-channel serial interface support (UART/CSI/I²C), and dedicated hardware for CRC-16/32 computation and BCD correction - all accessible via configurable I/O redirection registers without PCB changes.

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 R5F102A8DSP#V0, the R5F102A7DSP#V0 trades flash/RAM capacity for lower BOM cost while retaining identical low-power behavior and peripheral set; versus R5F103A7DSP#V0, it adds critical data flash durability and hardware acceleration for robust firmware management in field-deployed devices.

Availability

R5F102A7DSP#V0 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial panel controllers, and white goods appliance control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for R5F102A7DSP#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 delivers true low-power 16-bit MCU performance for cost-sensitive consumer and industrial applications - emphasizing energy efficiency, integrated analog peripherals, and simplified development through hardware accelerators like CRC and BCD.

FAQ

What is the maximum operating frequency of the R5F102A7DSP#V0?

The R5F102A7DSP#V0 supports a maximum system clock frequency of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS performance. External crystal operation is rated up to 20 MHz. The minimum instruction execution time is 0.04167 µs at 24 MHz, confirmed in the RL78/G12 datasheet Rev.2.50.

Does the R5F102A7DSP#V0 include on-chip data flash memory?

Yes, the R5F102A7DSP#V0 includes 2 KB of on-chip data flash memory with 1,000,000 write/erase cycles (typical) and background operation (BGO) capability. This allows the R5F102A7DSP#V0 to execute application code while simultaneously rewriting data flash - essential for firmware parameter storage and over-the-air updates.

What low-power modes are supported by the R5F102A7DSP#V0?

The R5F102A7DSP#V0 supports HALT mode (63 μA/MHz), STOP mode (0.52 μA), and SNOOZE mode - which enables fast wake-up from serial interface activity without full CPU restart. These modes are documented in the RL78/G12 datasheet and validated for –40°C to +85°C operation, making the R5F102A7DSP#V0 suitable for battery-powered edge devices.

Can the R5F102A7DSP#V0 operate from a 1.8 V supply?

Yes, the R5F102A7DSP#V0 is fully specified for operation from 1.8 V to 5.5 V, including all peripherals and flash programming functionality. At 1.8 V, the high-speed on-chip oscillator operates up to 16 MHz, and the 10-bit ADC maintains full specification - enabling direct integration with Li-ion, coin-cell, or energy-harvesting power sources.

What is the purpose of the REGC pin on the R5F102A7DSP#V0?

The REGC pin on the R5F102A7DSP#V0 connects to an external 0.47–1 µF capacitor tied to VSS, stabilizing the internal voltage regulator that powers analog circuitry including the ADC and reference buffers. Failure to populate this capacitor results in undefined analog performance and potential ADC inaccuracies - a requirement explicitly stated in the RL78/G12 datasheet Section 1.4.3.