Renesas R5F2L357CNFP#31

Overview

R5F2L357CNFP#31 from Renesas is a 16-bit R8C/L35C Group microcontroller featuring the R8C CPU core, 48 KB flash program memory, 6 KB RAM, and 1 KB × 4 data flash with background operation (BGO). It delivers 50 ns minimum instruction execution at 20 MHz, integrates a 16×16→32-bit hardware multiplier, and supports LCD drive (up to 4 COM / 24 SEG pins) for appliance control panels.

For engineers reviewing the R5F2L357CNFP#31 datasheet, R5F2L357CNFP#31 pinout, R5F2L357CNFP#31 application, or R5F2L357CNFP#31 equivalent, key selection criteria include its 52-pin LQFP package, -20°C to +85°C N-grade temperature range, 10-channel 10-bit ADC, dual 8-bit DACs, and integrated LIN module using UART0 and Timer RA.

Technical Context

The R5F2L357CNFP#31 implements the R8C CPU core with 89 fundamental instructions and single-chip mode addressing up to 1 Mbyte. Its clock system includes XIN (20 MHz max), XCIN (32 kHz), 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 Timer RA/RB (8-bit), Timer RC (16-bit, 4 capture/compare registers), Timer RE (real-time clock), DTC (1 channel, 38 activation sources), UART0/UART1/UART2 (with I²C mode), SSU, LIN hardware module, and comparator B (2 circuits), all operating under voltage detection (power-on reset + VD3) and low-power modes (wait/stop/power-off).

Key Specifications

Pinout & Package

52-pin LQFP (PLQP0052JA-A, 0.65 mm pitch), RoHS-compliant, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L357CNFP#31, R5F2L358CNFP#31 offers 16 KB more flash for complex feature sets without layout changes, while R5F2L357CDFP#31 provides guaranteed operation down to -40°C - both retain identical peripheral functionality and 52-pin LQFP compatibility.

Availability

R5F2L357CNFP#31 is available at Aetrix Electronics and suitable for appliance control panels, home audio interfaces, and office equipment UIs requiring stable component supply across multi-year production cycles.

Supply support for R5F2L357CNFP#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, power, and SoC solutions for automotive, industrial, and enterprise markets.

The R8C/L35C Group targets cost-sensitive, LCD-equipped consumer and industrial control applications, emphasizing low power, integrated peripherals, and robust EMI performance in compact packages.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F2L357CNFP#31?

The R5F2L357CNFP#31 operates at up to 20 MHz when supplied with 2.7–5.5 V, achieving a minimum instruction execution time of 50 ns. At lower frequencies (e.g., 5 MHz), it supports down to 1.8 V, enabling ultra-low-power operation in battery-powered devices while maintaining full peripheral functionality.

Does the R5F2L357CNFP#31 support hardware LIN communication?

Yes, the R5F2L357CNFP#31 includes a dedicated hardware LIN module compliant with LIN 2.0/2.1 standards. It uses UART0 and Timer RA to generate accurate baud rates and handle frame formatting, eliminating software-based bit-banging and ensuring deterministic timing for automotive body electronics applications.

How many LCD segment and common pins does the R5F2L357CNFP#31 support?

The R5F2L357CNFP#31 supports up to 24 segment output pins and 4 common output pins (COM0–COM3). It does not include VL3, limiting LCD bias to 1/2 or 1/3 only, and lacks SEG52–SEG55 pins - thus 1/8 duty operation is not supported per the datasheet.

What debug capabilities are integrated into the R5F2L357CNFP#31?

The R5F2L357CNFP#31 features an on-chip debug interface supporting non-intrusive breakpoints, watchpoints, and real-time variable inspection via a single-wire interface. It enables full firmware development and validation without requiring external emulators, reducing tooling cost and accelerating bring-up.

Is background operation (BGO) available for data flash writes on the R5F2L357CNFP#31?

Yes, the R5F2L357CNFP#31 supports background operation (BGO) for data flash. This allows the CPU to execute application code while simultaneously erasing or programming data flash blocks - essential for seamless over-the-air updates or runtime parameter storage without system interruption.