Renesas R5F2L388MNFP#31

Overview

R5F2L388MNFP#31 from Renesas is an 8-bit R8C CPU core MCU with 64 KB flash, 8 KB RAM, and integrated LCD controller supporting up to 48 segment/8 common outputs. It features a 10-bit ADC (16 channels), dual 8-bit DACs, hardware LIN interface, and operates at up to 20 MHz (VCC = 2.7–5.5 V) for embedded control in appliance front panels and industrial HMI displays.

For engineers reviewing the R5F2L388MNFP#31 datasheet, R5F2L388MNFP#31 pinout, R5F2L388MNFP#31 application, or R5F2L388MNFP#31 equivalent, key selection criteria include LCD drive capability (56-segment max in L3AM group, but 48-segment confirmed for L38M), A/D channel count (16), operating temperature range (−20°C to +85°C), and 80-pin LQFP package compatibility.

Technical Context

The R5F2L388MNFP#31 belongs to the R8C/L38M Group, implementing the R8C CPU core with 89 fundamental instructions and a 16×16→32-bit hardware multiplier. It supports background operation (BGO) for data flash programming during code execution and integrates a real-time clock (Timer RE) with calendar mode.

Its peripheral set includes Timer RD (16-bit × 2, 6-PWM output), UART0/1/2 (with I²C mode on UART2), SSU, DTC (1 channel, 38 activation sources), and voltage detection circuitry with programmable reset thresholds. Clock sources comprise XIN (up to 20 MHz), XCIN (32 kHz), and on-chip high-/low-speed oscillators.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PLQP0080KB-A, 0.50 mm pitch), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L388MNFP#31, R5F2L38AMNFP#31 offers more flash for complex UI logic but identical peripheral set, while R5F2L368MNFP#31 reduces pin count and LCD capability - making it suitable for scaled-down implementations where 48-segment drive and 16 ADC channels are unnecessary.

Availability

R5F2L388MNFP#31 is available at Aetrix Electronics and suitable for appliance control panels, industrial HMIs, home audio UIs, and smart thermostats requiring stable component supply and long-term production support.

Supply support for R5F2L388MNFP#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 solutions for industrial, automotive, and consumer markets.

The R8C/L38M Group, including R5F2L388MNFP#31, was designed for cost-effective, low-power embedded control with integrated LCD driving - targeting appliance interfaces and compact industrial displays.

FAQ

What is the maximum LCD segment count supported by the R5F2L388MNFP#31?

The R5F2L388MNFP#31 supports up to 48 segment outputs and 8 common outputs, as confirmed in Table 1.3 and Figure 1.7 of the R01DS0028EJ0100 datasheet. This capability is specific to the R8C/L38M Group and exceeds the 32-segment limit of the L36M Group. The R5F2L388MNFP#31 uses P0–P4, P6, and P7 pins for segment drive, with COM0–COM7 assigned to P7_0–P7_7.

Does the R5F2L388MNFP#31 include hardware LIN functionality?

Yes, the R5F2L388MNFP#31 integrates a hardware LIN module per Section 1.5 of the datasheet, using Timer RA and UART0 to implement LIN 2.0 physical layer signaling. This eliminates the need for external LIN transceivers in slave-node applications such as appliance motor control or sensor nodes, and is distinct from software-emulated LIN on general-purpose UARTs.

What are the operating voltage and frequency specifications for the R5F2L388MNFP#31?

The R5F2L388MNFP#31 operates from VCC = 1.8–5.5 V. At 2.7–5.5 V, it supports up to 20 MHz XIN frequency (50 ns min instruction time); at 1.8–5.5 V, max frequency is 5 MHz. These ranges are specified in Table 1.6 and validated across the −20°C to +85°C ambient temperature range for the N-version part.

How many analog-to-digital converter (ADC) channels does the R5F2L388MNFP#31 provide?

The R5F2L388MNFP#31 provides 16 channels of 10-bit ADC with sample-and-hold and sweep mode, as stated in Table 1.5 under "A/D Converter" for the R8C/L38M Group. This is confirmed in the block diagram (Figure 1.7) and differentiates it from the 12-channel ADC in L35M/L36M variants.

Is background operation (BGO) supported for data flash on the R5F2L388MNFP#31?

Yes, the R5F2L388MNFP#31 supports background operation (BGO) for its 1 KB × 4 data flash, enabling erase and write operations while the CPU executes application code. This is explicitly listed in Table 1.6 "Specifications (3)" and is a key enabler for in-field firmware updates without system interruption.