Renesas R5F10RJAGFA#10

Overview

R5F10RJAGFA#10 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-bit ADC (10 channels), RTC with calendar, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD), targeting battery-powered LCD display systems such as smart meters and portable medical devices.

For engineers reviewing the R5F10RJAGFA#10 datasheet, R5F10RJAGFA#10 pinout, R5F10RJAGFA#10 application, or R5F10RJAGFA#10 equivalent, key selection criteria include verified LCD segment/complement drive capability, confirmed 52-pin LQFP (0.65 mm pitch) package mapping, real-time clock accuracy with watch correction, low-voltage detection (14 settings), and IEC/UL 60730 safety features including RAM parity and flash CRC.

Technical Context

The R5F10RJAGFA#10 implements a Harvard-architecture 16-bit RL78 CPU core delivering 31 DMIPS at 24 MHz, with 86% of instructions executed in 1–2 clock cycles and hardware multiply/accumulate support. Its on-chip high-speed oscillator achieves ±1% accuracy across 1.8–5.5 V and −20°C to +85°C.

It supports three LCD driving methods-capacitor split (0.12 µA), internal voltage boost (0.63 µA at VDD = 3.0 V), and resistance division-with programmable contrast (16 steps) and blinking control. The device includes two DMA channels, one UART, two CSI interfaces (SPI-compatible), one I²C, and LIN support-all configurable via peripheral I/O redirection register (PIOR).

Key Specifications

Pinout & Package

Package: 52-pin plastic LQFP (10 × 10 mm, 0.65 mm pitch), industrial-grade (G-suffix), RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RJCGFA#10, the R5F10RJAGFA#10 provides 4× more flash and 1.5× more RAM for complex UI logic and data buffering; versus R5F10RLAGFA#10, it offers identical processing and LCD capability in a smaller, lower-cost 52-pin footprint-ideal for space-constrained industrial displays where full 64-pin I/O is unnecessary.

Availability

R5F10RJAGFA#10 is available at Aetrix Electronics and suitable for smart energy meters, portable medical devices, industrial control panels, and home appliance timers requiring stable component supply across extended product lifecycles.

Supply support for R5F10RJAGFA#10 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs for automotive, industrial, and IoT markets.

The RL78/L12 product line is designed specifically for ultra-low-power LCD-based applications-integrating high-efficiency LCD drivers, precision RTC, and robust safety features to replace discrete display controllers in cost-sensitive industrial and consumer equipment.

FAQ

What is the maximum operating frequency and power consumption of the R5F10RJAGFA#10?

The R5F10RJAGFA#10 operates at up to 24 MHz using its on-chip high-speed oscillator (±1% accuracy). At this frequency, active current is 62.5 µA/MHz, equating to ~1.5 mA total. In Halt mode with RTC and LVD enabled, it draws only 0.64 µA-critical for battery longevity in R5F10RJAGFA#10-based portable instruments.

Does the R5F10RJAGFA#10 support multiple LCD driving methods, and how are they selected?

Yes, the R5F10RJAGFA#10 supports capacitor split, internal voltage boost, and resistance division LCD driving methods. Selection is made via LCD control registers (LCDCR1/LCDCR2) at runtime-no hardware changes needed. Capacitor split achieves lowest current (0.12 µA), while internal boost supports higher V_LCD at 0.63 µA (VDD = 3.0 V), both configurable in R5F10RJAGFA#10 firmware.

What safety certifications and built-in diagnostics does the R5F10RJAGFA#10 provide?

The R5F10RJAGFA#10 meets IEC/UL 60730 Class B requirements with hardware-level safety features: flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, clock frequency monitor, and ADC self-test. These are implemented in silicon-not software-and are fully documented in the R5F10RJAGFA#10 hardware manual for certification evidence.

Can the R5F10RJAGFA#10 operate from a single 1.8 V supply, and what peripherals remain functional?

Yes, the R5F10RJAGFA#10 operates across 1.6 V to 5.5 V. At 1.8 V, the high-speed on-chip oscillator runs up to 16 MHz, all 10-bit ADC channels function (with 1.45 V internal reference), RTC remains active, and LCD driver supports capacitor split and resistance division modes. However, internal voltage boost mode requires ≥2.4 V and is disabled below that threshold in R5F10RJAGFA#10 operation.

How many LCD segments and commons does the R5F10RJAGFA#10 support, and what are the pin assignments?

The R5F10RJAGFA#10 supports up to 35 segments × 8 commons (or 39 × 4) via dedicated SEG0–SEG36 and COM0–COM7 pins. Segments map to ports P140–P145, P40–P42, P50–P51, P70–P71, and P30–P32; commons connect to P125/VL3, VL4, VL2, VL1, and P126/CAPL/P127/CAPH. Pin assignments are fixed per the R5F10RJAGFA#10 52-pin LQFP top view diagram.