Renesas R5F2L3ACCNFA#U0

Overview

R5F2L3ACCNFA#U0 from Renesas Electronics is a 16-bit R8C CPU core-based microcontroller in the R8C/L3AC Group, featuring 128 KB program flash, 10 KB RAM, 20-channel 10-bit ADC, 56-segment/8-common LCD driver, and 88 programmable I/O ports - deployed in appliance control panels requiring integrated display driving and analog sensing.

For engineers reviewing the R5F2L3ACCNFA#U0 datasheet, R5F2L3ACCNFA#U0 pinout, R5F2L3ACCNFA#U0 application, or R5F2L3ACCNFA#U0 equivalent, key selection criteria include its 100-pin QFP package with VL1–VL4 LCD bias pins, background operation (BGO) data flash, LIN bus hardware support via UART0 + Timer RA, and -40°C to +85°C industrial temperature grade.

Technical Context

The R5F2L3ACCNFA#U0 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and 1 Mbyte address space - enabling deterministic real-time execution at up to 20 MHz (50 ns min. instruction time). It integrates dual clock domains: XIN (up to 20 MHz) and XCIN (32 kHz), with selectable frequency dividers and low-power modes including wait, stop, and power-off.

Peripheral subsystems include Timer RD (16-bit ×2, supporting 6-pin complementary PWM for motor control), Timer RG (16-bit phase-counting mode), DTC (1-channel data transfer controller with 38 activation sources), and hardware LIN module using UART0 and Timer RA - all coordinated under a single interrupt vector table with 69 vectors and 7 priority levels.

Key Specifications

Pinout & Package

Package: 100-pin QFP (PRQP0100JD-B), 0.65 mm pitch, body size 14.0 × 20.0 mm, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L3ACCNFA#U0, R5F2L3ACCNFP offers identical functionality in a finer-pitch LQFP but lacks industrial temperature support, while R5F2L38CCNFA retains mechanical compatibility but trades 8 I/Os, 4 LCD segments, and 4 ADC channels for lower unit cost - making it viable only when those resources are surplus.

Availability

R5F2L3ACCNFA#U0 is available at Aetrix Electronics and suitable for appliance control panels, industrial HMIs, home audio UIs, and motorized HVAC systems requiring stable component supply across long production lifecycles.

Supply support for R5F2L3ACCNFA#U0 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/L3AC Group - including R5F2L3ACCNFA#U0 - was designed for cost-sensitive, display-intensive embedded applications requiring integrated LCD driving, analog sensing, and LIN communication in a single chip.

FAQ

What is the maximum operating frequency and corresponding supply voltage for R5F2L3ACCNFA#U0?

R5F2L3ACCNFA#U0 operates at up to 20 MHz when supplied at 2.7–5.5 V. At lower supply voltages (1.8–5.5 V), the maximum frequency is 5 MHz. These limits are defined by the R8C CPU core's timing specifications and ensure stable execution across its industrial temperature range (-40°C to +85°C).

Does R5F2L3ACCNFA#U0 support hardware LIN communication, and which peripherals are involved?

Yes, R5F2L3ACCNFA#U0 includes a dedicated hardware LIN module compliant with LIN 2.1, implemented using UART0 for serial framing and Timer RA for baud rate generation and synchronization. This offloads LIN protocol handling from the CPU and guarantees timing accuracy without software intervention.

How many analog input channels does R5F2L3ACCNFA#U0 provide, and what is their resolution?

R5F2L3ACCNFA#U0 provides 20 analog input channels with 10-bit resolution. Each channel includes sample-and-hold circuitry and supports sweep mode for sequential conversion - enabling efficient acquisition of multiple sensor signals such as temperature, humidity, and potentiometer position in appliance control applications.

What LCD display capabilities does R5F2L3ACCNFA#U0 offer, and how is bias voltage generated?

R5F2L3ACCNFA#U0 supports up to 56 segment outputs and 8 common outputs, with integrated voltage multiplier and dedicated regulator for VL1–VL4 bias generation. This eliminates external charge pumps and allows configuration of 1/2, 1/3, or 1/4 bias ratios - simplifying design of multiplexed LCDs in consumer and industrial interfaces.

Is background operation (BGO) supported for data flash writes on R5F2L3ACCNFA#U0?

Yes, R5F2L3ACCNFA#U0 supports background operation (BGO) for data flash, allowing erase and write operations to execute concurrently with program execution from main flash memory. This enables seamless firmware updates and parameter storage without application interruption - critical for field-upgradable appliances and HMIs.