Renesas R5F2L38CMNFA#V0

Overview

R5F2L38CMNFA#V0 from Renesas is an 8-bit R8C CPU core microcontroller in the R8C/L38M Group, featuring 128 KB flash program memory, 10 KB RAM, and 1 KB × 4 data flash with background operation (BGO). It delivers 50 ns minimum instruction execution at 20 MHz, integrates a 16×16→32-bit hardware multiplier, and supports LCD drive up to 8 common/48 segment outputs - deployed in appliance control panels requiring integrated timing, analog sensing, and low-power display management.

For engineers reviewing the R5F2L38CMNFA#V0 datasheet, R5F2L38CMNFA#V0 pinout, R5F2L38CMNFA#V0 application, or R5F2L38CMNFA#V0 equivalent, key selection criteria include its 80-pin LQFP (0.65 mm pitch) package, 16-channel 10-bit ADC with sweep mode, dual 8-bit DACs, real-time clock (Timer RE), and LIN bus support via UART0 + Timer RA - all operating across -20°C to +85°C.

Technical Context

The R5F2L38CMNFA#V0 implements the R8C CPU core with 89 fundamental instructions and single-chip 1 Mbyte address space. Its clock system includes four independent sources: XIN (up to 20 MHz), XCIN (32 kHz), high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator - with selectable division ratios (1/2/4/8/16) and oscillation stop detection.

Peripheral integration centers on mixed-signal control: Timer RD provides three-phase PWM with complementary output (6 pins), Timer RC offers 3-pin PWM and input capture, while DTC enables autonomous transfers triggered by 38 sources. The device includes voltage detection (power-on reset + dual-level VDD monitoring), watchdog timer (14-bit with prescaler), and dual comparators with external reference support.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PLQP0080JA-A), 12 × 12 mm body, 0.65 mm lead pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit MCU applications.

Compared with R5F2L38CMNFA#V0, the R5F2L38AMNFA#V0 offers identical functionality at reduced flash capacity for cost-sensitive volume production, while the R5F2L36CMNFA#V0 trades pin count, ADC channels, and LCD drive capability for a smaller footprint and lower component count in less complex appliances.

Availability

R5F2L38CMNFA#V0 is available at Aetrix Electronics and suitable for microwave oven control panels, air conditioner indoor units, refrigerator display modules, and smart washing machine UIs requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for R5F2L38CMNFA#V0 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, and power management ICs for automotive, industrial, and consumer markets.

The R8C/L38M Group targets cost-sensitive, high-integration embedded control applications in white goods and audio equipment - emphasizing low-power LCD drive, analog sensing, and real-time responsiveness.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F2L38CMNFA#V0?

The R5F2L38CMNFA#V0 operates at up to 20 MHz when supplied at 2.7–5.5 V, and supports reduced-frequency operation down to 5 MHz at 1.8–5.5 V. This dual-voltage flexibility enables use in both legacy 5 V systems and modern low-voltage designs while maintaining full peripheral functionality across the range.

Does the R5F2L38CMNFA#V0 support hardware LIN communication?

Yes, the R5F2L38CMNFA#V0 integrates a dedicated hardware LIN module using UART0 and Timer RA to implement LIN 2.1 physical and data link layers. This offloads protocol handling from firmware, guarantees timing compliance, and supports automatic sync-break detection and checksum validation without CPU intervention.

How many LCD segments and commons can the R5F2L38CMNFA#V0 drive simultaneously?

The R5F2L38CMNFA#V0 drives up to 48 segment outputs and 8 common outputs, enabling multiplexed LCD configurations such as 8×48 or 6×48. Its integrated voltage multiplier and bias regulator eliminate external components, and it supports static, 1/2, 1/3, 1/4, and 1/8 duty cycles with 1/2–1/4 bias options.

What low-power modes are available on the R5F2L38CMNFA#V0, and what is the lowest current consumption?

The R5F2L38CMNFA#V0 offers wait, stop, and power-off modes. In power-off mode with Timer RE enabled, it consumes just 1.4 µA at 3.0 V; with Timer RE disabled, consumption drops to 0.02 µA. All modes retain register contents and support wake-up via external interrupt, RTC alarm, or key input.

Is background operation (BGO) supported for data flash writes on the R5F2L38CMNFA#V0?

Yes, the R5F2L38CMNFA#V0 supports background operation (BGO) for data flash, allowing program execution to continue uninterrupted during erase and write operations. This enables safe firmware updates, parameter logging, or calibration storage without freezing real-time control tasks or user interface responsiveness.