Renesas R5F10RGAAFB#30

Overview

R5F10RGAAFB#30 from Renesas is a 48-pin LFQFP, 16 KB flash, 2 KB data flash, 1 KB RAM RL78/L12 16-bit microcontroller with integrated LCD controller/driver (35 seg × 8 com), 10-bit ADC (10 channels), RTC, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD) for battery-powered LCD display systems.

For engineers reviewing the R5F10RGAAFB#30 datasheet, R5F10RGAAFB#30 pinout, R5F10RGAAFB#30 application, or R5F10RGAAFB#30 equivalent, key selection criteria include its 48-pin 7 mm × 7 mm 0.5 mm pitch LFQFP package, 16 KB code flash density, on-chip LCD drive capability up to 280 segments, and support for capacitor-split and internal-boost LCD bias methods.

Technical Context

The R5F10RGAAFB#30 implements the RL78 CPU core with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 clock cycles. It integrates a dedicated LCD controller supporting waveform types A/B, 16-step contrast adjustment, and blinking control - all configurable without CPU intervention.

Its power management includes POR, 14-level LVD with interrupt/reset options, and multiple low-power modes: Stop (0.23 µA RAM-retained), Halt (0.64 µA with RTC+LVD), and Snooze mode for background LCD refresh. The high-speed on-chip oscillator delivers ±1% accuracy at 24 MHz across 1.8–5.5 V and −20°C to +85°C.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP, 7 mm × 7 mm, 0.5 mm pitch (Renesas code PLQP0048KB-B).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RGAAFB#30, R5F10RFAAFA#50 offers identical flash/RAM but reduced LCD scalability and I/O count in a larger package, whereas R5F10RLAAFB#30 provides full pin compatibility for LCD and peripherals while adding interrupt and analog resources - making it a direct upgrade path for feature-expanded designs.

Availability

R5F10RGAAFB#30 is available at Aetrix Electronics and suitable for smart metering, portable medical devices, home appliance control panels, and industrial HMIs requiring stable component supply and long-term lifecycle assurance.

Supply support for R5F10RGAAFB#30 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line targets ultra-low-power LCD-based applications, integrating optimized peripherals like LCD controllers, RTC, and low-voltage ADC to minimize external components in cost-sensitive consumer and industrial displays.

FAQ

What is the maximum LCD segment count supported by the R5F10RGAAFB#30?

The R5F10RGAAFB#30 supports up to 35 segment × 8 common or 39 segment × 4 common configurations, enabling up to 280 distinct LCD segments. This is implemented via dedicated SEG0–SEG35 and COM0–COM7 pins, with flexible bias method selection (capacitor-split, internal-boost, or resistor-divider) managed entirely in hardware without CPU overhead. The R5F10RGAAFB#30 achieves this using its integrated LCD controller with built-in waveform generators and contrast registers.

Does the R5F10RGAAFB#30 support true hardware RTC with calendar functionality?

Yes, the R5F10RGAAFB#30 includes a full-featured real-time clock with BCD-encoded calendar (year/month/day/hour/minute/second), alarm interrupt, and watch correction function. It operates independently in Halt mode drawing only 0.64 µA when paired with the low-voltage detector (LVD). The RTC uses the 32.768 kHz subsystem clock (XT1/XT2) and maintains time accuracy within ±1 ppm when calibrated - confirmed in Section 1.5.3 of the R01DS0157EJ0223 datasheet.

What low-power modes are available on the R5F10RGAAFB#30, and what is the lowest active current draw?

The R5F10RGAAFB#30 offers Stop mode (0.23 µA RAM-retained), Halt mode (0.64 µA with RTC + LVD active), and Snooze mode for LCD-only operation. Its active operating current is 62.5 µA/MHz - measured at 24 MHz, this yields 1.5 mA typical active current. All modes are accessible via software-controlled system registers and require no external circuitry, enabling rapid transitions between full operation and sub-microamp sleep states in battery-critical designs.

Can the R5F10RGAAFB#30 perform ADC conversions while writing to data flash?

Yes, the R5F10RGAAFB#30 supports background data flash operations: ADC conversions can execute concurrently with data flash erase/write cycles using the DMA controller. This is enabled by the independent bus architecture separating CPU, peripheral, and flash interfaces - allowing uninterrupted analog acquisition during firmware-over-the-air (FOTA) updates or parameter logging. The 2 KB data flash endurance is rated at 1 million erase cycles per block.

What is the purpose of the REGC pin on the R5F10RGAAFB#30, and how must it be connected?

The REGC pin on the R5F10RGAAFB#30 connects to the internal voltage regulator's stabilization capacitor. It must be tied to VSS via a 0.47 µF to 1 µF ceramic capacitor - as explicitly required in datasheet pages 6–17 and Figure 1-1 pin diagrams. Failure to install this capacitor causes unstable core voltage, leading to unpredictable resets or LCD flicker. This is not optional decoupling; it is a mandatory part of the internal LDO's feedback network.