Renesas R5F10WLEAFA#50

Overview

R5F10WLEAFA#50 from Renesas is a 64-pin LQFP (0.65 mm pitch), 48 KB flash, 2 KB RAM RL78/L13 16-bit microcontroller with integrated LCD controller/driver, 12-channel 10-bit ADC, dual comparators, and ultra-low-power operation down to 71 μA/MHz - designed for battery-powered LCD-based consumer devices such as smart meters, thermostats, and portable medical displays.

For engineers reviewing the R5F10WLEAFA#50 datasheet, R5F10WLEAFA#50 pinout, R5F10WLEAFA#50 application, or R5F10WLEAFA#50 equivalent, key selection criteria include its 48 KB code flash + 4 KB data flash, 64-pin LQFP package with 49 I/Os (including 12 N-ch open-drain), LCD segment/common drive capability (36 seg / 4 com), and support for LIN-bus UART, CSI, and I²C interfaces in a single-chip solution.

Technical Context

The R5F10WLEAFA#50 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz while supporting configurable clock sources: high-speed on-chip oscillator (1–24 MHz, ±1.0%), external crystal (X1/X2 up to 20 MHz), and subsystem clock (32.768 kHz). It integrates a 12-bit interval timer, RTC2 with calendar and alarm, and watchdog timer with dedicated low-speed oscillator.

Its peripheral set includes an 8-channel 16-bit Timer Array Unit (TAU) with PWM, 1-channel 16-bit KB20 timer, 4-channel DMA, multiplier/divider/MAC unit, and serial interfaces: 3 UART channels (1 LIN-capable), 2 CSI channels, and 1 I²C channel - all mapped across 64 pins with flexible peripheral I/O redirection via PIOR register.

Key Specifications

Pinout & Package

64-pin plastic LQFP (12 × 12 mm, 0.65 mm pitch), with REGC pin requiring 0.47–1 μF capacitor to VSS. Pin functions are configurable via Peripheral I/O Redirection Register (PIOR).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10WLDAFA#50, the R5F10WLEAFA#50 provides 16 KB more flash and 0.5 KB more RAM for complex UI logic and longer data retention, while matching its ultra-low-power LCD capabilities; versus R5F10WMEAFA#50, it trades 16 KB flash for cost-sensitive designs where full 64 KB is unnecessary.

Availability

R5F10WLEAFA#50 is available at Aetrix Electronics and suitable for smart energy meters, programmable thermostats, and portable medical displays requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F10WLEAFA#50 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/L13 product line targets ultra-low-power LCD-based applications, integrating display drivers, precision analog, and robust communication interfaces into a single chip to reduce BOM count and simplify design for consumer and industrial HMIs.

FAQ

What is the maximum operating frequency and associated current consumption of the R5F10WLEAFA#50?

The R5F10WLEAFA#50 achieves 31 DMIPS at 24 MHz using its high-speed on-chip oscillator. At this frequency, typical active current is 71 μA/MHz (≈1.7 mA total), verified under VDD = 3.3 V, TA = 25°C per R01DS0168EJ0232 Rev.2.32. The device maintains full functionality across its 1.6–5.5 V range, with frequency scaling supported by multiple clock domains.

Does the R5F10WLEAFA#50 support hardware-based LCD bias generation?

Yes, the R5F10WLEAFA#50 includes an integrated LCD controller that supports three bias generation methods: internal voltage boosting (for 3–5 V VDD), capacitor split (for 2.7–3.6 V), and external resistance division (for 1.8–2.7 V). This eliminates need for external charge pumps or resistor networks, reducing BOM cost and board area in LCD applications.

How many I/O pins on the R5F10WLEAFA#50 support N-ch open-drain operation with 6 V tolerance?

The R5F10WLEAFA#50 provides exactly two N-ch open-drain I/O pins rated for 6 V withstand voltage: P02 and P07. These pins can safely interface with higher-voltage peripherals (e.g., 5 V sensors or displays) without external level-shifting circuitry, simplifying mixed-voltage system design.

Can the R5F10WLEAFA#50 execute code while rewriting its data flash memory?

Yes, the R5F10WLEAFA#50 supports Background Operation (BGO) for data flash. While rewriting the 4 KB data flash memory, the CPU continues executing instructions from code flash - enabling seamless data logging, calibration updates, or parameter changes without system interruption or latency spikes.

What is the function of the REGC pin on the R5F10WLEAFA#50, and what capacitor value is required?

The REGC pin on the R5F10WLEAFA#50 connects to the internal voltage regulator's stabilization capacitor. Per R01DS0168EJ0232 Rev.2.32 Section 1.3.1, a 0.47 μF to 1 μF ceramic capacitor must be placed between REGC and VSS. Failure to install this capacitor risks unstable internal regulation and erratic LCD or analog performance.