Renesas R5F2L3ACCDFP#31

Overview

R5F2L3ACCDFP#31 from Renesas is a 16-bit R8C/L3AC Group microcontroller featuring an R8C CPU core, 128 KB flash program memory, 10 KB RAM, and integrated LCD drive control supporting up to 8 common and 56 segment outputs. It delivers 10-bit A/D conversion across 20 channels, dual 8-bit D/A converters, and multiple timer peripherals including Timer RD (16-bit × 2) for three-phase PWM generation. It targets embedded control in LCD-based consumer appliances requiring low-power operation and high I/O density.

For engineers reviewing the R5F2L3ACCDFP#31 datasheet, R5F2L3ACCDFP#31 pinout, R5F2L3ACCDFP#31 application, or R5F2L3ACCDFP#31 equivalent, key selection criteria include its 100-pin LQFP package, -40°C to +85°C industrial temperature grade, 20-channel ADC with sweep mode, background operation (BGO) data flash, and hardware LIN module using UART0 and Timer RA.

Technical Context

The R5F2L3ACCDFP#31 implements the R8C CPU core with 89 fundamental instructions and a 16×16→32-bit hardware multiplier, enabling efficient signal processing and real-time control. Its system clock supports four sources: external XIN (up to 20 MHz), 32 kHz XCIN, high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator - all selectable via software-controlled frequency dividers (1/2/4/8/16).

Peripheral integration includes a Data Transfer Controller (DTC) with 38 activation sources and two transfer modes, a watchdog timer with selectable low-speed oscillator source, and a LIN module compliant with ISO 9141-2/SAE J2602, implemented using UART0 and Timer RA for automatic frame timing and checksum handling.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PLQP0100KB-A), 0.5 mm pitch, 14 × 14 mm body, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L3ACCDFP#31, R5F2L3ACCNFP offers identical functionality at lower cost but lacks extended temperature qualification, while R5F2L38CCDFP reduces LCD and I/O capacity to fit a smaller package - making R5F2L3ACCDFP#31 optimal for full-featured, thermally demanding LCD applications.

Availability

R5F2L3ACCDFP#31 is available at Aetrix Electronics and suitable for refrigerator control panels, industrial HMIs, smart thermostats, and audio equipment front panels requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for R5F2L3ACCDFP#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 management solutions for automotive, industrial, and IoT markets.

The R8C/L3AC Group is designed for cost-sensitive, LCD-integrated consumer and industrial control applications requiring high I/O count, integrated analog peripherals, and robust low-power operation - with R5F2L3ACCDFP#31 representing its highest-density variant.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F2L3ACCDFP#31?

The R5F2L3ACCDFP#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 - high-speed execution during active mode and ultra-low-power operation in battery-backed standby states. The R5F2L3ACCDFP#31 maintains full peripheral functionality across its entire voltage range.

Does the R5F2L3ACCDFP#31 support hardware LIN communication, and how is it implemented?

Yes, the R5F2L3ACCDFP#31 integrates a dedicated hardware LIN module compliant with ISO 9141-2 and SAE J2602 standards. It uses UART0 for serial framing and Timer RA for precise baud rate timing and synchronization, eliminating software-based bit-banging. This offloads the CPU, ensures deterministic timing, and supports automatic checksum generation and error detection - critical for reliable communication in appliance networks. The R5F2L3ACCDFP#31 requires no external transceiver for basic LIN node operation.

How many LCD segments and commons does the R5F2L3ACCDFP#31 support, and what bias configurations are available?

The R5F2L3ACCDFP#31 supports up to 8 common outputs (COM0–COM7) and 56 segment outputs (SEG0–SEG55), enabling large custom alphanumeric or graphical displays. It integrates a voltage multiplier and dedicated regulator to generate required LCD bias voltages, supporting 1/2, 1/3, and 1/4 bias ratios with static, 1/2, 1/3, 1/4, and 1/8 duty cycles. The R5F2L3ACCDFP#31's VL1–VL4 and CL1/CL2 pins provide direct control over bias distribution and timing.

What low-power modes are available on the R5F2L3ACCDFP#31, and what are their typical current draws?

The R5F2L3ACCDFP#31 offers Wait mode (3.5 µA @ 3.0 V, 32 kHz XCIN active), Stop mode (2 µA), and Power-off mode (0.02 µA). In Wait mode, the CPU halts but peripherals like Timer RE and ADC continue operating; Stop mode disables the main clock while retaining RAM and register contents; Power-off mode shuts down all circuitry except the reset circuit. These modes make the R5F2L3ACCDFP#31 suitable for energy-conscious designs such as battery-powered thermostats and portable HMIs.

Is background operation (BGO) supported for data flash on the R5F2L3ACCDFP#31, and what is its endurance rating?

Yes, the R5F2L3ACCDFP#31 supports Background Operation (BGO) for its 1 KB × 4 data flash blocks, allowing read/execute operations from program ROM while simultaneously erasing or programming data flash. This enables seamless firmware updates and parameter storage without system interruption. The data flash is rated for 10,000 write/erase cycles, and the R5F2L3ACCDFP#31 includes ROM code protection and ID code check features to secure stored data.