Renesas R5F2L388CNFA#V0

Overview

R5F2L388CNFA#V0 from Renesas is an 80-pin LQFP (0.65 mm pitch) 16-bit R8C/L38C Group MCU featuring a 64 KB flash program memory, 8 KB RAM, 16-channel 10-bit ADC, 48-segment LCD driver, and integrated LIN module. It operates at up to 20 MHz with 2.7–5.5 V supply, supports background data flash programming (BGO), and targets embedded control in cost-sensitive consumer and industrial displays.

For engineers reviewing the R5F2L388CNFA#V0 datasheet, R5F2L388CNFA#V0 pinout, R5F2L388CNFA#V0 application, or R5F2L388CNFA#V0 equivalent, key selection criteria include its 80-pin PLQP0080JA-A package, 16-channel analog input capability, 48-segment LCD drive with VL1–VL4 bias control, and hardware LIN bus support using Timer RA and UART0.

Technical Context

The R5F2L388CNFA#V0 implements the R8C CPU core with 89 instructions, 16×16→32-bit multiplier, and 1 Mbyte address space. It integrates dual clock systems: high-speed XIN (up to 20 MHz) and low-power XCIN (32 kHz), with selectable frequency dividers (1/2/4/8/16) and oscillation stop detection.

Peripheral integration includes Timer RD (16-bit ×2, supporting 6-pin complementary PWM and three-phase waveform generation), DTC for autonomous data transfers, and a voltage-detection circuit with programmable reset and voltage monitoring levels - all optimized for EMI/EMS robustness in appliance-grade environments.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PLQP0080JA-A), 0.65 mm pitch, exposed pad not specified, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit MCU with LCD and LIN applications.

Compared with R5F2L388CNFA#V0, R5F2L388CNFP#V0 offers identical functionality in a denser package for space-constrained layouts, while R5F2L368CNFA#V0 reduces segment count and ADC channels - enabling smaller BOMs and simpler firmware for entry-level UIs.

Availability

R5F2L388CNFA#V0 is available at Aetrix Electronics and suitable for refrigerator control panels, multifunction printer displays, smart thermostats, and industrial HMIs requiring stable component supply across extended production lifecycles.

Supply support for R5F2L388CNFA#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 IoT markets.

The R8C/L38C Group, including R5F2L388CNFA#V0, was designed for cost-optimized, EMI-robust embedded control in consumer appliances and office equipment with integrated LCD and LIN connectivity.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F2L388CNFA#V0?

The R5F2L388CNFA#V0 operates at up to 20 MHz when supplied with 2.7–5.5 V. At reduced frequencies (e.g., 5 MHz), it supports down to 1.8 V, enabling flexible power design. Its high-speed on-chip oscillator provides ±2% accuracy after calibration, and the XIN clock circuit supports external crystals up to 20 MHz for precise timing in LIN and RTC applications. The R5F2L388CNFA#V0 maintains full peripheral functionality across this voltage range.

Does the R5F2L388CNFA#V0 support hardware LIN communication, and which peripherals are involved?

Yes, the R5F2L388CNFA#V0 includes a dedicated hardware LIN module compliant with LIN 2.1 and SAE J2602. It uses UART0 for serial framing and Timer RA for baud rate generation and synchronization. This offloads protocol handling from firmware, ensuring deterministic timing and reducing CPU load. No external transceiver is integrated - an external LIN PHY (e.g., TJA1020) must be used, connected to UART0 pins. The R5F2L388CNFA#V0 does not support CAN or other bus protocols natively.

How many LCD segments and commons can the R5F2L388CNFA#V0 drive, and what bias configurations are supported?

The R5F2L388CNFA#V0 supports up to 48 segment outputs and 8 common outputs, enabling 1/8 duty cycle operation. It integrates VL1–VL4 bias pins and an internal voltage multiplier, allowing 1/2, 1/3, and 1/4 bias configurations. VL3 is present, enabling full 1/4 bias support. The R5F2L388CNFA#V0 does not require external charge pumps for most LCD types, simplifying BOM and layout. Segment mapping is fixed per port (P0–P7), with P6 and P7 extending beyond the base R8C/L35C group.

What ADC capabilities does the R5F2L388CNFA#V0 provide, and how is conversion triggered?

The R5F2L388CNFA#V0 features a 10-bit successive-approximation ADC with 16 input channels (AN0–AN15), sample-and-hold circuitry, and hardware sweep mode. Conversions can be triggered by software, Timer RB/RC/RE compare events, or external ADTRG signal on P3_7. Sweep mode automatically cycles through all enabled channels without CPU intervention, storing results in RAM via DTC. The R5F2L388CNFA#V0 supports differential input mode only on specific pairs (not general-purpose), and reference voltage is selectable between AVCC or internal 2.5 V.

Is background operation (BGO) supported for data flash writes on the R5F2L388CNFA#V0, and what are the constraints?

Yes, the R5F2L388CNFA#V0 supports Background Operation (BGO) for data flash programming and erasure. While BGO is active, the CPU executes code from ROM or RAM and simultaneously performs flash operations - essential for seamless firmware updates. Data flash is organized as four 1 KB blocks; each block must be erased before rewriting. BGO requires interrupt masking during critical flash states, and write endurance is rated at 10,000 cycles. The R5F2L388CNFA#V0 does not support BGO for program ROM modification during execution.