Renesas R5F2L388BNFP#U1

Overview

R5F2L388BNFP#U1 from Renesas Electronics is an 8-bit R8C/L38B Group microcontroller featuring the R8C CPU core, 64 KB program ROM, 8 KB RAM, 68 programmable I/O ports, and integrated LCD controller supporting up to 48 segment outputs. It operates at up to 20 MHz (VCC = 2.7–5.5 V), includes 16-channel 10-bit ADC, dual 8-bit DACs, hardware LIN interface, and real-time clock (timer RE). It targets embedded control in consumer appliances with LCD displays.

For engineers reviewing the R5F2L388BNFP#U1 datasheet, R5F2L388BNFP#U1 pinout, R5F2L388BNFP#U1 application, or R5F2L388BNFP#U1 equivalent, key selection considerations include its -40°C to +85°C industrial temperature grade (D version), 88-pin LQFP package, background operation (BGO)-enabled data flash absence, and dedicated LCD bias regulator supporting 1/2, 1/3, and 1/4 duty cycles.

Technical Context

The R5F2L388BNFP#U1 implements the R8C CPU core with 89 fundamental instructions and a 16×16→32-bit hardware multiplier, enabling efficient signal processing and control loop execution. Its clock system integrates four independent sources: XIN oscillator (up to 20 MHz), 32 kHz XCIN crystal circuit, high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator - all selectable via software for dynamic power management.

Peripheral integration includes Timer RD (16-bit ×2, supporting complementary PWM for three-phase motor control), UART0/1/2 (with I²C mode on UART2), SSU, LIN module (using timer RA and UART0), and DTC for autonomous data transfers. The device lacks data flash (R8C/L38B Group), relying solely on program ROM for firmware storage and updates via on-chip debug.

Key Specifications

Pinout & Package

Package: 88-pin LQFP (PLQP0088KB-A), 12 mm × 12 mm, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L388BNFP#U1, R5F2L388ANFP trades industrial temperature range for data flash functionality, while R5F2L3AA8DNFP extends I/O and LCD capacity within the same temperature grade - enabling design scalability without sacrificing environmental robustness.

Availability

R5F2L388BNFP#U1 is available at Aetrix Electronics and suitable for refrigerator control panels, smart microwave ovens, washing machine main boards, and office multi-function printer displays requiring stable component supply across industrial temperature ranges.

Supply support for R5F2L388BNFP#U1 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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.

The R8C/L38B Group, including R5F2L388BNFP#U1, was designed for cost-sensitive, LCD-equipped consumer appliances requiring robust real-time control, low-power operation, and integrated display driving without external bias components.

FAQ

What is the operating temperature range for R5F2L388BNFP#U1?

R5F2L388BNFP#U1 is rated for -40°C to +85°C ambient operation (D version), making it suitable for industrial and demanding consumer appliance environments where thermal stability is critical. This specification is confirmed in Table 1.7 of the preliminary datasheet REJ03B0243-0030 Rev.0.30. The device maintains full functionality across this range, including real-time clock operation and LCD bias regulation.

Does R5F2L388BNFP#U1 include data flash memory?

No, R5F2L388BNFP#U1 does not include data flash memory. As a member of the R8C/L38B Group, it omits the 1 KB × 4 data flash with background operation (BGO) found in the R8C/L38A Group. Firmware updates must be performed via program ROM using the on-chip debug interface, and non-volatile parameter storage requires external EEPROM or FRAM if needed.

Which package type is used for R5F2L388BNFP#U1?

R5F2L388BNFP#U1 uses an 88-pin LQFP package (PLQP0088KB-A), measuring 12 mm × 12 mm with 0.5 mm pitch and an exposed thermal pad. This package is explicitly listed in Table 1.12 (Product List for R8C/L38B Group) and supports high-density PCB layouts while enabling effective thermal management in enclosed appliance enclosures.

How many ADC channels does R5F2L388BNFP#U1 support?

R5F2L388BNFP#U1 supports 16 analog input channels with 10-bit resolution, sample-and-hold, and sweep mode - consistent with the R8C/L38B Group specification in Table 1.6. This enables concurrent monitoring of multiple sensors (e.g., temperature, humidity, current) in appliance applications without external multiplexing hardware.

Is R5F2L388BNFP#U1 pin-compatible with other R8C/L38x parts?

R5F2L388BNFP#U1 shares the same 88-pin LQFP package and pin assignment with all R8C/L38B Group variants (e.g., R5F2L38ABNFP, R5F2L38CBNFP), but is not pin-compatible with R8C/L38A Group parts due to differences in data flash control signals and internal routing. Pin compatibility is strictly limited to same-group D-version devices per Figures 1.5–1.7 in the datasheet.