Renesas R5F2LA84ANFA#V0

Overview

R5F2LA84ANFA#V0 from Renesas is an 80-pin LQFP (0.65 mm pitch) 16-bit R8C/LA8A Group MCU with 16 KB program ROM, 2 KB RAM, 2 KB data flash, 72 programmable I/O ports, 12-channel 10-bit A/D converter, and integrated LCD drive (40 segment outputs). It features the R8C CPU core with 16×16→32-bit multiplier, real-time clock (Timer RH), three 16-bit Timer RJ units, and operates from 1.8 V to 5.5 V for use in appliance control panels with segmented LCD displays.

For engineers reviewing the R5F2LA84ANFA#V0 datasheet, R5F2LA84ANFA#V0 pinout, R5F2LA84ANFA#V0 application, or R5F2LA84ANFA#V0 equivalent, key selection criteria include its 80-pin LQFP-0.65mm package, N-grade (−20 to 85°C) temperature rating, on-chip data flash for parameter storage, and dedicated LCD segment/common drivers enabling direct interface to 4-digit 7-segment or custom character displays without external drivers.

Technical Context

The R5F2LA84ANFA#V0 implements the R8C CPU core with 89 fundamental instructions and supports single-chip mode across a 1 Mbyte address space. Its system clock generation includes four independent circuits: XIN oscillator (up to 20 MHz), dedicated XCIN/XCOUT 32 kHz crystal input, high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator - enabling flexible power-mode transitions between active, wait (1.7 µA), stop (0.5 µA), and power-off modes.

Peripheral integration centers on mixed-signal control: Timer RH provides calendar-based real-time clock functionality with alarm and periodic interrupt; Timer RJ0–RJ2 support pulse width measurement, event counting, and PWM output; UART0 and UART2 (I²C-capable) enable serial communication; and the 12-channel A/D converter includes sample-and-hold and internal temperature sensor (−20 to 85°C).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2LA84ANFA#V0, R5F2LA84ANFP offers identical functionality in a denser 0.5 mm pitch package requiring tighter layout tolerances, while R5F2LA64ANFA reduces I/O, A/D channels, and LCD capacity to lower cost and footprint - making it suitable only when those resources are surplus to requirements.

Availability

R5F2LA84ANFA#V0 is available at Aetrix Electronics and suitable for refrigerator control panels, microwave oven interfaces, washing machine UI boards, and air conditioner remote displays requiring stable component supply across extended production lifecycles.

Supply support for R5F2LA84ANFA#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, power, and SoC solutions for automotive, industrial, and consumer markets.

The R8C/LA8A Group is designed for cost-effective, low-power embedded control in home appliances with integrated LCD interfaces, targeting applications needing robust real-time performance, on-chip data retention, and minimal external component count.

FAQ

What is the maximum operating frequency of the R5F2LA84ANFA#V0 and under what voltage conditions?

The R5F2LA84ANFA#V0 achieves a maximum operating frequency of 20 MHz when supplied with VCC ≥ 2.7 V. At lower voltages down to 1.8 V, the maximum supported frequency is 8 MHz. This dual-voltage/frequency specification allows designers to optimize between performance and ultra-low-power operation - for example, running at 20 MHz during active UI updates and scaling down to 8 MHz during background sensor polling to reduce dynamic power consumption.

Does the R5F2LA84ANFA#V0 support I²C communication, and if so, which peripheral implements it?

Yes, the R5F2LA84ANFA#V0 supports I²C communication through UART2, which can be configured in I²C-bus mode. This capability is shared with the Synchronous Serial Communication Unit (SSU), allowing the same physical pins (P8_2/SCL and P8_3/SDA) to operate in either UART or I²C protocol depending on software configuration - providing flexibility for connecting to temperature sensors, EEPROMs, or other I²C peripherals without requiring additional GPIO resources.

How many LCD segment and common outputs does the R5F2LA84ANFA#V0 provide, and what bias/duty configurations are supported?

The R5F2LA84ANFA#V0 provides up to 40 segment outputs and 4 common outputs for LCD driving. It supports LCD bias ratios of 1/2 and 1/3, and duty configurations including static, 1/2, 1/3, and 1/4. These settings are controlled via the LSE0–LSE5 registers, enabling direct drive of multiplexed character displays (e.g., 4×7-segment) or custom segment layouts commonly found in appliance control panels - eliminating the need for external LCD driver ICs.

What is the purpose of the XCIN and XCOUT pins on the R5F2LA84ANFA#V0, and how do they differ from XIN/XOUT?

The XCIN and XCOUT pins on the R5F2LA84ANFA#V0 are dedicated to a 32 kHz crystal oscillator circuit used exclusively for low-power real-time clock (RTC) operation and ultra-low-power modes like stop and power-off. Unlike the main XIN/XOUT pair - which supports crystals up to 20 MHz for system clock generation - XCIN/XCOUT operate at fixed low frequency, enabling Timer RH to maintain accurate timekeeping while consuming only nanowatts, critical for battery-backed applications such as remote controls or standby timers.

Is the R5F2LA84ANFA#V0 pin-compatible with other members of the R8C/LA8A Group, such as R5F2LA86ANFA or R5F2LA88ANFA?

Yes, the R5F2LA84ANFA#V0 is fully pin-compatible with all other 80-pin LQFP variants in the R8C/LA8A Group, including R5F2LA86ANFA (32 KB ROM), R5F2LA88ANFA (64 KB ROM), and R5F2LA8AANFA (96 KB ROM). They share identical pin assignments, electrical characteristics, and peripheral register maps - allowing firmware reuse and seamless memory scalability on the same PCB layout without hardware modification.