Renesas R5F2L38AMNFP#31

Overview

R5F2L38AMNFP#31 from Renesas Electronics is a 16-bit R8C/L38M Group microcontroller featuring the R8C CPU core, 96 KB flash program memory, 10 KB RAM, and integrated LCD drive control supporting up to 8 common and 48 segment outputs. It operates at up to 20 MHz (VCC = 2.7–5.5 V), includes 16-channel 10-bit ADC, dual 8-bit DACs, and hardware LIN interface-designed for embedded control in appliance front-panel displays.

For engineers reviewing the R5F2L38AMNFP#31 datasheet, R5F2L38AMNFP#31 pinout, R5F2L38AMNFP#31 application, or R5F2L38AMNFP#31 equivalent, key selection criteria include its 80-pin LQFP package, -20°C to +85°C temperature grade, background operation (BGO) data flash, and real-time clock (timer RE) with power-off mode current as low as 1.4 µA.

Technical Context

The R5F2L38AMNFP#31 implements the R8C CPU core with 89 fundamental instructions and a 16×16→32-bit hardware multiplier, enabling efficient signal processing in resource-constrained systems. Its clock system integrates four independent sources: XIN oscillator (up to 20 MHz), XCIN 32-kHz crystal circuit, high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator-each selectable via software-controlled frequency divider (1/2/4/8/16).

Peripheral integration includes Timer RD (16-bit ×2, supporting three-phase PWM and complementary output), UART0/1/2 (with I²C mode on UART2), SSU/I²C shared bus, DTC for autonomous transfers across 38 activation sources, and voltage detection with programmable reset thresholds. The MCU supports wait/stop/power-off low-power modes, with power-off mode consuming only 0.02 µA when timer RE is disabled.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PLQP0080KB-A), 0.5 mm pitch, exposed pad not specified, body size 12 × 12 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L388MNFP and R5F2L38CMNFP, the R5F2L38AMNFP#31 delivers optimal balance: sufficient flash (96 KB) for complex UI logic and calibration tables without over-provisioning, while maintaining full peripheral compatibility and identical thermal/power behavior in the 80-pin LQFP footprint.

Availability

R5F2L38AMNFP#31 is available at Aetrix Electronics and suitable for appliance control panels, industrial HMIs, smart thermostats, and home audio frontends requiring stable component supply across multi-year production cycles.

Supply support for R5F2L38AMNFP#31 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and consumer markets.

The R8C/L38M Group is designed for cost-sensitive, low-power embedded applications requiring integrated LCD driving, analog sensing, and real-time control-targeting white goods, building automation, and portable instrumentation.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F2L38AMNFP#31?

The R5F2L38AMNFP#31 operates at up to 20 MHz when supplied with 2.7–5.5 V, and supports reduced-frequency operation down to 5 MHz at 1.8 V. This dual-voltage capability enables flexible power design-such as using a single 3.3 V rail for both logic and analog sections while maintaining full performance.

Does the R5F2L38AMNFP#31 support in-circuit debugging and flash programming?

Yes, the R5F2L38AMNFP#31 includes on-chip debug functionality compatible with Renesas E1/E20 emulators and supports on-board flash rewrite via dedicated serial interface. This enables firmware updates in the field without removing the MCU from the PCB, critical for deployed appliance maintenance.

How many LCD segments and commons does the R5F2L38AMNFP#31 support, and what bias configurations are available?

The R5F2L38AMNFP#31 supports up to 48 segment outputs and 8 common outputs, with bias options of 1/2, 1/3, or 1/4 and duty cycles including static, 1/2, 1/3, 1/4, and 1/8. Its integrated voltage multiplier eliminates external components for generating VL1–VL4, simplifying layout for multiplexed LCDs.

What low-power modes are available on the R5F2L38AMNFP#31, and what is the typical current consumption in each?

The R5F2L38AMNFP#31 offers wait mode (3.5 µA @ 3.0 V, 32 kHz), stop mode (2 µA), and power-off mode (1.4 µA with timer RE active; 0.02 µA with timer RE disabled). These modes are controlled via software registers and retain RAM contents, enabling rapid wake-up for responsive user interfaces.

Is the R5F2L38AMNFP#31 pin-compatible with other members of the R8C/L3xM family?

Yes, all R8C/L38M Group devices-including R5F2L387MNFP, R5F2L388MNFP, R5F2L38AMNFP#31, and R5F2L38CMNFP-share identical 80-pin LQFP (PLQP0080KB-A) packaging and pinout. Firmware and hardware designs are interchangeable across memory variants without PCB revision.