Renesas R5F21358MNFP#50

Overview

R5F21358MNFP#50 from Renesas Electronics is a 16-bit R8C CPU core microcontroller with 64 KB flash program ROM, 6 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It operates at up to 20 MHz (VCC = 2.7–5.5 V), integrates dual 10-bit A/D converters (12 channels), dual 8-bit D/A outputs, LIN hardware module, and six timer units including complementary PWM-capable Timer RD for motor control in consumer appliance power stages.

For engineers reviewing the R5F21358MNFP#50 datasheet, R5F21358MNFP#50 pinout, R5F21358MNFP#50 application, or R5F21358MNFP#50 equivalent, key selection criteria include its 52-pin LQFP package, -20°C to +85°C temperature grade (N version), integrated voltage detection and watchdog timer, and support for real-time clock (Timer RE) and LIN bus communication via UART0.

Technical Context

The R5F21358MNFP#50 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte (00000h–FFFFFh), with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash at 03000h–03FFFh.

Peripheral integration includes three UART/serial interfaces (UART0–UART2), I²C-bus/SSU shared channel, hardware LIN using UART0 and Timer RA, 10-bit A/D converter with sample-and-hold and sweep mode, and Timer RD supporting reset-synchronous and complementary PWM for three-phase motor drive with 6-pin output capability.

Key Specifications

Pinout & Package

52-pin LQFP package (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm lead pitch, RoHS-compliant, surface-mount compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21358MDFP, the R5F21358MNFP#50 offers identical functionality at lower temperature rating and cost; versus R5F21357MNFP, it provides 16 KB more flash and 2 KB more RAM for complex control algorithms or larger feature sets without changing PCB layout.

Availability

R5F21358MNFP#50 is available at Aetrix Electronics and suitable for home appliance motor control, audio equipment power management, and office equipment sensor interface requiring stable component supply across long production lifecycles.

Supply support for R5F21358MNFP#50 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/35M Group, including R5F21358MNFP#50, was designed for cost-effective, low-power embedded control in consumer electronics-emphasizing integrated peripherals (LIN, A/D, D/A, timers), EMI/EMS robustness, and flash flexibility for rapid feature iteration.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F21358MNFP#50?

The R5F21358MNFP#50 supports a maximum operating frequency of 20 MHz at VCC = 2.7–5.5 V, and 5 MHz at VCC = 1.8–5.5 V. Its voltage detection circuit provides programmable brown-out reset thresholds, ensuring reliable operation across wide input ranges typical in AC/DC adapter-fed consumer devices. The R5F21358MNFP#50 maintains full peripheral functionality across this entire voltage window.

Does the R5F21358MNFP#50 support hardware LIN communication, and how is it implemented?

Yes, the R5F21358MNFP#50 integrates a hardware LIN module compliant with LIN 2.0/2.1 standards. It combines UART0 for serial framing and Timer RA for precise baud rate generation and sync field timing. This eliminates the need for an external LIN transceiver in applications like appliance door lock modules or HVAC actuators. The R5F21358MNFP#50 uses dedicated pins (P1_5/P1_4 for RXD0/TXD0) and internal SFRs (U0MR, U0C0) to configure LIN-specific timing and error handling.

How does the data flash with Background Operation (BGO) function benefit firmware updates in the R5F21358MNFP#50?

The R5F21358MNFP#50 features 4 KB of data flash organized in four 1 KB blocks, each supporting Background Operation (BGO). During BGO, flash erase/write operations execute in parallel with CPU program execution-enabling over-the-air (OTA) or USB-based firmware updates without halting real-time control tasks. This is critical in motor control applications where uninterrupted PWM output must be maintained. The R5F21358MNFP#50 uses dedicated SFRs (FMRDYIC, FRAx) to manage BGO status and interrupt completion.

What timer resources does the R5F21358MNFP#50 provide for motor control applications?

The R5F21358MNFP#50 includes Timer RD (16-bit × 2 units, 4 capture/compare registers), which supports reset-synchronous PWM and complementary PWM modes for driving three-phase inverters. It outputs six PWM signals with configurable dead-time insertion and fault protection via external TRDIOx pins. Timer RC provides additional 3-pin PWM, while Timer RE delivers real-time clock functionality. All timers are accessible via dedicated SFRs (TRD0IC, TRD1IC, TREIC) and share the same interrupt vector structure for deterministic response. The R5F21358MNFP#50's timer architecture enables precise field-oriented control (FOC) loop execution.

Is the R5F21358MNFP#50 pin-compatible with other members of the R8C/35M Group, and what are the key compatibility constraints?

Yes, all R8C/35M Group MCUs-including R5F21354MNFP through R5F2135CMNFP-share identical 52-pin LQFP (PLQP0052JA-A) packaging and pinout. Firmware and hardware designs are interchangeable across ROM/RAM variants, provided memory-mapped peripheral register addresses (e.g., SFRs at 0000h–002FFh) and interrupt vector tables remain consistent. The R5F21358MNFP#50 requires no PCB changes when substituted for R5F21357MNFP or R5F21356MNFP, though application code must verify sufficient flash/RAM headroom. Temperature grade (N vs. D) and marking suffix (#50) do not affect pin compatibility.