Renesas R5F2L388CNFA#V1

Overview

R5F2L388CNFA#V1 from Renesas is an 8-bit R8C/L38C Group microcontroller featuring a 64 KB flash program memory, 8 KB RAM, and integrated LCD drive control supporting up to 48 segment outputs and 8 common outputs. It operates at up to 20 MHz (50 ns min. instruction time), includes a 16×16-bit hardware multiplier, 10-bit ×16-channel ADC with sample-and-hold, dual 8-bit DACs, and real-time clock (Timer RE). It targets embedded control in appliances with integrated display interfaces.

For engineers reviewing the R5F2L388CNFA#V1 datasheet, R5F2L388CNFA#V1 pinout, R5F2L388CNFA#V1 application, or R5F2L388CNFA#V1 equivalent, key selection criteria include its 80-pin LQFP (0.65 mm pitch) package, -20°C to +85°C temperature grade (N version), background operation (BGO) data flash, and hardware LIN support via Timer RA and UART0.

Technical Context

The R5F2L388CNFA#V1 implements the R8C CPU core with 89 fundamental instructions and a 1 Mbyte address space, enabling high-efficiency code execution. Its system clock generation includes four independent circuits: XIN oscillator (up to 20 MHz), XCIN 32 kHz crystal input, high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator - all selectable for dynamic power mode management.

Peripheral integration centers on mixed-signal timing and human interface: Timer RD provides three-phase PWM with complementary output (6 pins), Timer RG supports phase-counting and single-output PWM, and the LCD controller integrates voltage multiplier and bias regulation for static/1/2/1/3/1/4 duty operation without external components.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit MCU applications.

Compared with R5F2L388CNFA#V1, R5F2L388CNFP offers identical functionality in a denser package requiring tighter layout tolerances, while R5F2L368CNFA reduces segment count, ADC channels, and timer features - making it appropriate for scaled-down appliance UIs without complex motor or sensing requirements.

Availability

R5F2L388CNFA#V1 is available at Aetrix Electronics and suitable for refrigerator control panels, printer front panels, home audio keypads, smart thermostats, and industrial HMI displays requiring stable component supply across extended product lifecycles.

Supply support for R5F2L388CNFA#V1 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 is designed for cost-optimized, display-rich embedded control in white goods and consumer electronics - emphasizing integrated LCD drivers, low-power operation, and hardware-assisted communication protocols like LIN.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for the R5F2L388CNFA#V1?

The R5F2L388CNFA#V1 supports a maximum operating frequency of 20 MHz at VCC = 2.7–5.5 V, delivering a minimum instruction execution time of 50 ns. At lower frequencies (e.g., 5 MHz), it operates down to VCC = 1.8 V, enabling ultra-low-power applications such as battery-backed thermostats where the R5F2L388CNFA#V1 maintains full functionality.

Does the R5F2L388CNFA#V1 support hardware LIN communication, and which peripherals are involved?

Yes, the R5F2L388CNFA#V1 includes a dedicated hardware LIN module compliant with LIN 2.1 and SAE J2602 standards. It uses UART0 for serial framing and Timer RA for baud rate generation and synchronization - eliminating software bit-banging and ensuring deterministic timing critical for automotive and appliance sub-networks. This feature is fully implemented in the R5F2L388CNFA#V1 without external components.

How many LCD segment and common outputs does the R5F2L388CNFA#V1 support, and what bias configurations are available?

The R5F2L388CNFA#V1 supports up to 48 segment outputs and 8 common outputs for multiplexed LCDs. It integrates a voltage multiplier and bias regulator, enabling 1/2, 1/3, and 1/4 bias configurations - selectable via register settings - with no external resistors required. This capability is confirmed for the R8C/L38C Group and applies directly to the R5F2L388CNFA#V1.

What low-power modes are available on the R5F2L388CNFA#V1, and what are their typical current draws?

The R5F2L388CNFA#V1 offers wait mode (3.5 µA @ 3.0 V, 32 kHz XCIN), stop mode (2 µA), and power-off mode (0.02 µA), all with full register retention and wake-up via interrupts or reset. These modes are validated in the R8C/L38C Group datasheet and apply to the R5F2L388CNFA#V1, enabling multi-year battery operation in wireless sensor nodes or standby displays.

Is background operation (BGO) supported for data flash on the R5F2L388CNFA#V1, and how is it implemented?

Yes, the R5F2L388CNFA#V1 supports background operation (BGO) for its 1 KB ×4 data flash blocks. During BGO, the CPU continues executing code from program flash while data flash is erased or rewritten - essential for over-the-air UI updates or logging without system interruption. This function is explicitly documented for the R8C/L38C Group and confirmed for the R5F2L388CNFA#V1.