Renesas R5F10WMAAFB#50

Overview

R5F10WMAAFB#50 from Renesas is an 80-pin LFQFP (12 × 12 mm, 0.5 mm pitch) 16-bit RL78/L13 microcontroller with integrated LCD controller/driver, 64 KB flash, 4 KB data flash, 4 KB RAM, and ultra-low power operation down to 71 μA/MHz. It features a 24 MHz RL78 CPU core delivering 31 DMIPS, 12-channel 8/10-bit ADC, dual comparators, RTC2 with calendar, and supports LCD-based consumer instrumentation including portable meters and home appliance displays.

For engineers reviewing the R5F10WMAAFB#50 datasheet, R5F10WMAAFB#50 pinout, R5F10WMAAFB#50 application, or R5F10WMAAFB#50 equivalent, this page delivers verified technical context, exact package mapping, validated pin functions, real-world use cases, and two confirmed alternative parts for LCD-focused embedded designs requiring low-voltage operation (1.6–5.5 V), extended temperature support (−40°C to +85°C), and on-chip debug capability.

Technical Context

The R5F10WMAAFB#50 implements the RL78 CISC CPU core with 3-stage pipeline and configurable instruction timing (0.04167 µs min @ 24 MHz, 30.5 µs @ 32.768 kHz). Its memory subsystem includes 64 KB code flash (1 KB block size), 4 KB data flash with background operation (BGO) and 1M write cycles, and 4 KB on-chip RAM - all operating across 1.6–5.5 V supply.

Peripherals are tightly integrated for LCD-centric systems: 51-segment / 8-common LCD driver with selectable voltage-boosting methods; 12-channel A/D converter with internal 1.45 V reference and temperature sensor; dual independent comparators with window mode; UART0/1/3, CSI0/1, IICA0/1, and 8-channel TAU timer with PWM and remote control output (REMOOUT); plus DMA (4 channels), multiplier/divider, and RTC2 with alarm and clock correction.

Key Specifications

Pinout & Package

Package: 80-pin LFQFP (12 × 12 mm, 0.5 mm pitch), RoHS-compliant, consumer-grade (−40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LCD controller MCU applications.

Compared with R5F10WMAAFB#50, R5F10WMCAF#50 offers headroom for complex firmware growth without layout change, while R5F10WMEAFB#50 reduces cost and power in resource-constrained implementations - both share identical pinout, LCD driver capability, and low-power profile.

Availability

R5F10WMAAFB#50 is available at Aetrix Electronics and suitable for portable energy meters, smart thermostats, and home appliance control panels requiring stable component supply, long-term industrial availability, and RoHS-compliant packaging.

Supply support for R5F10WMAAFB#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 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 specifically for ultra-low-power LCD-based human-machine interfaces in consumer and industrial equipment - prioritizing integration, battery longevity, and simplified system design.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F10WMAAFB#50?

The R5F10WMAAFB#50 operates at up to 24 MHz using its high-speed on-chip oscillator, achieving 31 DMIPS performance. This rating is measured under standard conditions (VDD = 2.7–5.5 V, TA = −40°C to +85°C) and reflects real-world throughput for mixed-code workloads - not synthetic benchmarks. The R5F10WMAAFB#50 maintains full peripheral functionality at this speed, including LCD refresh and ADC sampling.

Does the R5F10WMAAFB#50 support hardware debugging, and what interface does it use?

Yes, the R5F10WMAAFB#50 includes full on-chip debug functionality accessible via the TOOL0, TOOLRxD, and TOOLTxD pins - compatible with Renesas E2 emulator and CS+ IDE. This interface supports breakpoints, watchpoints, register inspection, and flash programming without requiring additional debug headers or SWD/JTAG adapters. The R5F10WMAAFB#50 debug module remains active across all low-power modes except HALT, enabling deep power-state validation.

How many LCD segments and commons does the R5F10WMAAFB#50 support, and what bias methods are available?

The R5F10WMAAFB#50 supports up to 51 segment outputs and 8 common outputs, configured via dedicated VL1–VL4 pins and CAPH/CAPL terminals. It offers three selectable LCD bias methods: internal voltage boosting (for low-component-count designs), capacitor split (for medium-contrast panels), and external resistance division (for high-precision contrast tuning). All methods are software-configurable and operate within the 1.6–5.5 V supply range.

What are the key power-saving modes supported by the R5F10WMAAFB#50, and what is the lowest achievable current draw?

The R5F10WMAAFB#50 supports HALT, STOP, and SNOOZE modes. In STOP mode with RTC2 and LVD active, it draws just 0.61 μA (typical) at VDD = 3.0 V and TA = 25°C - verified per Renesas R01DS0168EJ0232 datasheet. This enables decade-long operation on CR2032 batteries in always-on LCD applications. Wake-up sources include key interrupts (KR0–KR7), RTC alarm, and external pins (INTP0–INTP7).

Can the R5F10WMAAFB#50 perform ADC conversions while executing code from flash memory?

Yes, the R5F10WMAAFB#50 supports concurrent ADC operation and program execution. Its 8/10-bit A/D converter can sample up to 12 channels with internal 1.45 V reference or external inputs, and conversion results are stored in dedicated registers without CPU intervention. Background operation is fully functional during active code execution - no stall or arbitration delay occurs, ensuring deterministic timing for sensor polling in real-time control loops.