Renesas R5F2L3ACMNFP#31

Overview

R5F2L3ACMNFP#31 from Renesas Electronics is a 16-bit R8C CPU core-based microcontroller in the R8C/L3AM Group, featuring 128 KB program flash, 10 KB RAM, 1 KB × 4 data flash with background operation (BGO), 20-channel 10-bit A/D converter, and integrated LCD drive supporting up to 8 common and 56 segment outputs. It targets embedded control in household appliances and consumer electronics requiring low-power operation and on-chip analog peripherals.

For engineers reviewing the R5F2L3ACMNFP#31 datasheet, R5F2L3ACMNFP#31 pinout, R5F2L3ACMNFP#31 application, or R5F2L3ACMNFP#31 equivalent, key selection criteria include its 100-pin LQFP package, -20°C to +85°C temperature grade (N version), 88 programmable I/O ports with 16 high-current drive pins, and hardware LIN module using Timer RA and UART0.

Technical Context

The R5F2L3ACMNFP#31 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. It supports single-chip mode with 1 Mbyte address space and executes instructions in as little as 50 ns at 20 MHz (VCC = 2.7–5.5 V).

Its peripheral set includes Timer RD (16-bit × 2, 6-pin PWM, complementary/sawtooth modulation), Timer RG (16-bit phase counting/PWM), UART0/1/2 (with I²C and LIN support), DTC (1 channel, 38 activation sources), and dual 8-bit D/A converters. The integrated voltage detection circuit provides power-on reset and selectable voltage monitoring levels.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PLQP0100KB-A, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L3A8MNFP, R5F2L3ACMNFP#31 provides 33% more program flash for feature-rich firmware, while versus R5F2L3ACMDFP it trades extended temperature rating for lower cost in climate-controlled consumer applications.

Availability

R5F2L3ACMNFP#31 is available at Aetrix Electronics and suitable for refrigerator control panels, smart microwave ovens, audio front panels, and home air purifiers requiring stable component supply and long-term manufacturing continuity.

Supply support for R5F2L3ACMNFP#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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The R8C/L3AM Group, including R5F2L3ACMNFP#31, was designed for cost-sensitive, low-power consumer and appliance applications requiring integrated LCD driving, analog sensing, and robust real-time control.

FAQ

What is the maximum operating frequency and voltage range supported by the R5F2L3ACMNFP#31?

The R5F2L3ACMNFP#31 operates at up to 20 MHz when supplied with 2.7–5.5 V, and supports reduced-frequency operation (5 MHz) down to 1.8 V for battery-backed applications. Its high-speed on-chip oscillator includes frequency adjustment, enabling stable clocking without an external crystal in cost-sensitive designs - though the R5F2L3ACMNFP#31 also supports external 20 MHz crystal input via XIN/XOUT pins for precision timing.

Does the R5F2L3ACMNFP#31 support in-system programming and debugging?

Yes, the R5F2L3ACMNFP#31 includes full on-chip debug functionality and supports in-system programming via the on-board flash rewrite function. It uses the standard Renesas E1/E20 emulator interface and requires no external programming hardware beyond a JTAG/SWD-compatible debugger. The background operation (BGO) feature allows R5F2L3ACMNFP#31 to execute application code while reprogramming data flash, enabling seamless firmware updates in deployed units.

How many analog input channels does the R5F2L3ACMNFP#31 support, and what is their resolution?

The R5F2L3ACMNFP#31 integrates a 10-bit successive-approximation A/D converter with 20 configurable analog input channels (AN0–AN19). Each channel supports sample-and-hold and sweep mode for sequential conversion without CPU intervention. Input voltage range is 0–VREF (externally applied or internally derived), and conversions can be triggered by software, timer, or external signal - making R5F2L3ACMNFP#31 suitable for multi-sensor monitoring in appliances and environmental controls.

Can the R5F2L3ACMNFP#31 drive a 4-digit 7-segment display directly without external drivers?

Yes, the R5F2L3ACMNFP#31's integrated LCD controller supports up to 8 common (COM) and 56 segment (SEG) outputs, fully covering 4-digit 7-segment displays (requiring ≤ 4 COM and ≤ 28 SEG) with margin. Its VL1–VL4 bias outputs and CL1/CL2 clock inputs generate all necessary waveforms internally. No external charge pump, resistor network, or segment drivers are needed - the R5F2L3ACMNFP#31 drives the display directly from its GPIO-mapped LCD pins.

What communication interfaces are available on the R5F2L3ACMNFP#31?

The R5F2L3ACMNFP#31 provides three UART channels (UART0–UART2), one I²C bus (shared with SSU), one synchronous serial unit (SSU), and hardware LIN 2.1 support (using UART0 and Timer RA). UART2 supports I²C mode and multiprocessor communication; SSU handles SPI-like protocols. These interfaces enable R5F2L3ACMNFP#31 to serve as a central hub connecting sensors, displays, remote controls, and auxiliary modules in appliance and consumer systems.