Renesas R5F10RJAGFA#V0

Overview

R5F10RJAGFA#V0 from Renesas is a 52-pin LQFP-packaged 16-bit RL78/L12 microcontroller with 32 KB flash, 2 KB data flash, and 1.5 KB RAM, operating from 1.6 V to 5.5 V. It integrates an LCD controller/driver (up to 35 seg × 8 com), 10-channel 10-bit ADC, RTC with calendar/alarm, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD) for battery-powered LCD applications such as smart meters and portable medical devices.

For engineers reviewing the R5F10RJAGFA#V0 datasheet, R5F10RJAGFA#V0 pinout, R5F10RJAGFA#V0 application, or R5F10RJAGFA#V0 equivalent, key selection criteria include its 52-pin LQFP-0.65 mm pitch package, industrial-grade −40°C to +105°C temperature range, integrated LCD drive capability with capacitor split/internal boost methods, and support for I²C, UART, LIN, and simplified SPI interfaces.

Technical Context

The R5F10RJAGFA#V0 implements the RL78 CPU core with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 clock cycles. It delivers 31 DMIPS at 24 MHz using the high-speed on-chip oscillator (±1% accuracy over voltage and temperature).

Its LCD controller supports three waveform types (A/B), 16-step contrast adjustment, blinking control, and flexible segment/common mapping - configurable for up to 35 segments × 8 commons or 39 segments × 4 commons via software-selectable drive methods (capacitor split, internal voltage boost, resistance division).

Key Specifications

Pinout & Package

52-pin plastic LQFP (10 × 10 mm, 0.65 mm pitch), RoHS-compliant, industrial-grade (−40°C to +105°C). Pin functions validated per Renesas R01DS0157EJ0223 Rev.2.23 datasheet, Section 1.3.4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RJAGFA#V0, R5F10RJCGFA#V0 offers reduced memory at lower cost for simpler applications, while R5F10RLAGFA#V0 provides scalability via more I/O and ADC resources - neither is pin-compatible, but both share the same RL78/L12 peripheral set and toolchain.

Availability

R5F10RJAGFA#V0 is available at Aetrix Electronics and suitable for smart energy metering, portable medical instrumentation, industrial HMI panels, and home appliance control requiring stable component supply and long-term industrial lifecycle support.

Supply support for R5F10RJAGFA#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 is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/L12 product line is designed specifically for ultra-low-power LCD-based applications - integrating high-efficiency LCD drivers, precision analog, and robust safety features into a single chip for metering, healthcare, and white goods.

FAQ

What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F10RJAGFA#V0?

The R5F10RJAGFA#V0 features a high-speed on-chip oscillator rated at 24 MHz with ±1% accuracy across the full industrial temperature range (−20°C to +85°C) and supply voltage (1.8 V to 5.5 V). This eliminates the need for an external crystal in many cost-sensitive applications while maintaining timing integrity for UART, RTC, and LCD frame synchronization.

Does R5F10RJAGFA#V0 support LCD drive with internal voltage boosting?

Yes, R5F10RJAGFA#V0 supports LCD operation using the internal voltage boost method, drawing only 0.63 µA at VDD = 3.0 V. This mode generates boosted LCD bias voltages internally, reducing external component count and PCB area compared to capacitor-split or resistor-divider approaches - ideal for compact portable designs.

What are the memory resources allocated to R5F10RJAGFA#V0?

R5F10RJAGFA#V0 includes 32 KB of code flash memory, 2 KB of data flash memory (rated for 1 million erase cycles), and 1.5 KB of RAM with backup retention in all low-power modes. The data flash supports background operation, allowing firmware to read/write parameters without halting program execution.

How does R5F10RJAGFA#V0 meet functional safety requirements for industrial use?

R5F10RJAGFA#V0 incorporates multiple hardware safety features aligned with IEC/UL 60730 Class B, including flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test - enabling certified safe operation in thermostats, motor controllers, and other safety-critical systems.

What communication interfaces are available on R5F10RJAGFA#V0?

R5F10RJAGFA#V0 provides one I²C multi-master interface (IICA0), one UART (7-/8-/9-bit), one LIN physical layer interface, and two simplified SPI (CSI) channels. All interfaces support flexible pin remapping via the Peripheral I/O Redirection Register (PIOR), simplifying PCB routing and enabling reuse of existing layouts across variants.