Renesas R5F10WLAAFA#10

Overview

R5F10WLAAFA#10 from Renesas is a 16-bit RL78/L13 microcontroller with integrated LCD controller/driver, 16 KB flash, 4 KB data flash, 1 KB RAM, and ultra-low-power operation (71 μA/MHz active, 0.61 μA RTC+LVD). It operates from 1.6 V to 5.5 V, supports 24 MHz max CPU speed (31 DMIPS), and targets battery-powered LCD-based consumer devices such as thermostats, blood glucose meters, and smart remote controls.

For engineers reviewing the R5F10WLAAFA#10 datasheet, R5F10WLAAFA#10 pinout, R5F10WLAAFA#10 application, or R5F10WLAAFA#10 equivalent, key selection criteria include its 64-pin LQFP-0.65 mm package, 36-segment/4-common LCD drive capability, dual comparator support, 9-channel 10-bit ADC, and HALT/STOP/SNOOZE low-power modes for energy-constrained designs.

Technical Context

The R5F10WLAAFA#10 implements the RL78 CISC CPU core with 3-stage pipeline, 1 MB address space, and configurable instruction timing (0.04167 µs min @ 24 MHz to 30.5 µs @ 32.768 kHz). It integrates a dedicated 16-bit timer KB20 for PWM output and a real-time clock 2 with calendar, alarm, and correction functions.

Its peripheral set includes 4-channel DMA, 8-channel 16-bit timer array (TAU), UART/LIN-capable serial interfaces (3 total), simplified SPI (CSI), I²C, and on-chip debug via TOOLRxD/TOOLTxD pins - all operating within a single 1.6–5.5 V supply rail without external level shifters.

Key Specifications

Pinout & Package

64-pin LQFP (12 × 12 mm, 0.65 mm pitch), RoHS-compliant, tray-packaged (#10). Pin functions validated per Renesas R01DS0168EJ0232 Rev.2.32, Pages 5–7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10WLAAFA#10, R5F10WMAAFA#10 offers greater I/O and display capability at the cost of board space, while R5F10WLCAFA#10 delivers scalable memory headroom within the same 64-pin LQFP footprint - enabling design reuse across product tiers.

Availability

R5F10WLAAFA#10 is available at Aetrix Electronics and suitable for thermostats, blood glucose monitors, and smart remote controls requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F10WLAAFA#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L13 product line is engineered for ultra-low-power LCD-based human-machine interfaces, integrating display control, sensing, and communication in a single chip for cost-sensitive portable instrumentation.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F10WLAAFA#10?

The R5F10WLAAFA#10 achieves a maximum CPU frequency of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. Its minimum instruction execution time is 0.04167 µs under this condition. The core also supports lower-speed operation down to 32.768 kHz for ultra-low-power RTC and sleep modes - all within the same 1.6–5.5 V supply range.

Does the R5F10WLAAFA#10 support in-circuit debugging, and what interface does it use?

Yes, the R5F10WLAAFA#10 includes an on-chip debug function accessible via dedicated TOOLRxD and TOOLTxD pins. These pins provide full debug capability including breakpoint setting, register inspection, and flash programming without requiring additional debug headers or SWD/JTAG adapters - simplifying development and production programming workflows for the R5F10WLAAFA#10.

How many LCD segments and commons can the R5F10WLAAFA#10 drive, and what drive methods are supported?

The R5F10WLAAFA#10 drives up to 36 segment signals and 4 common signals (or 32 segments × 8 commons), supporting alphanumeric LCDs with multiplex ratios up to 1:8. It implements three bias generation methods: internal voltage boosting, capacitor split, and external resistor division - allowing flexible integration with diverse LCD glass types without external driver ICs.

What low-power modes are available on the R5F10WLAAFA#10, and what is the lowest current consumption?

The R5F10WLAAFA#10 supports HALT, STOP, and SNOOZE modes. In STOP mode with RTC and LVD enabled, it consumes just 0.61 μA - ideal for battery-powered applications requiring long-term timekeeping and wake-on-event functionality. Active-mode current is 71 μA per MHz, making it highly efficient for intermittent sensing and display updates.

Can the R5F10WLAAFA#10 interface directly with 1.8 V or 2.5 V peripherals, and how is this achieved?

Yes, the R5F10WLAAFA#10 supports different-potential interface operation, allowing direct connection to 1.8 V, 2.5 V, or 3 V devices without external level shifters. This is implemented through configurable I/O port settings that adjust input thresholds and output drive strength - verified in the electrical specifications for TA = −40°C to +85°C and VDD = 1.6–5.5 V.