Renesas R5F21354ANFP#U1

Overview

R5F21354ANFP from Renesas Electronics is a 16-bit R8C/35A Group microcontroller with 16 KB flash program ROM, 1.5 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It features an R8C CPU core executing instructions in as little as 50 ns at 20 MHz, integrated 10-bit A/D converter (12 channels), dual 8-bit D/A converters, LIN hardware module, and operates from 1.8 V to 5.5 V across -20°C to +85°C ambient. It targets embedded control in consumer audio and office equipment.

For engineers reviewing the R5F21354ANFP datasheet, R5F21354ANFP pinout, R5F21354ANFP application, or R5F21354ANFP equivalent, key selection considerations include its 52-pin LQFP package, 16 KB flash capacity, BGO-enabled data flash for firmware updates without halting execution, and hardware LIN support for automotive body electronics interfacing.

Technical Context

The R5F21354ANFP implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte, with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash mapped to 03000h–03FFFh.

It integrates four independent timer units (RA–RD) including 16-bit PWM-capable RD with complementary three-phase output, UART0/1/2 with I²C mode, SSU, and a dedicated LIN module using UART0 and Timer RA. Power management includes wait/stop modes with typical current as low as 2.0 µA in stop mode.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pin pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21354ANFP, R5F21355ANFP offers headroom for enhanced firmware without altering hardware design, while R5F21354ADFP extends operational reliability in colder environments-both retain full peripheral compatibility and require no schematic or layout revision.

Availability

R5F21354ANFP is available at Aetrix Electronics and suitable for audio system control, office equipment motor drive, home appliance UI panels, and industrial sensor nodes requiring stable component supply throughout product lifecycles.

Supply support for R5F21354ANFP 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 enterprise applications.

The R8C/35A Group, including R5F21354ANFP, was designed for cost-sensitive, low-to-mid complexity embedded control in consumer electronics-emphasizing integration, low power, and ease of firmware development.

FAQ

What is the maximum operating frequency of the R5F21354ANFP?

The R5F21354ANFP supports a maximum operating frequency of 20 MHz when powered at 2.7–5.5 V using the XIN clock input. At lower supply voltages (1.8–5.5 V), the maximum frequency is reduced to 5 MHz to ensure stable operation and meet timing margins across process and temperature variations. The R5F21354ANFP uses an internal frequency divider to derive system clocks from the primary oscillator.

Does the R5F21354ANFP support in-circuit debugging?

Yes, the R5F21354ANFP includes on-chip debug functionality compliant with Renesas' standard debug interface. It supports breakpoints, watchpoints, register inspection, and flash programming via dedicated debug pins (not shared with general-purpose I/O). This enables full firmware development and validation without requiring external emulators-reducing tooling cost and accelerating bring-up of R5F21354ANFP-based designs.

How many analog input channels does the R5F21354ANFP ADC support?

The R5F21354ANFP integrates a single 10-bit successive-approximation ADC with 12 configurable analog input channels (AN0–AN11). These channels can be scanned in sweep mode under hardware trigger or software control, and include built-in sample-and-hold for accurate conversion of multiplexed signals. The ADC reference is selectable between AVCC or an external voltage applied to the VREF pin.

Is the R5F21354ANFP pin-compatible with other R8C/35A Group members?

Yes, all R8C/35A Group MCUs-including R5F21354ANFP, R5F21355ANFP, and R5F21356ANFP-share identical 52-pin LQFP (PLQP0052JA-A) packaging and pin assignments. Peripheral function mapping, power pin locations, and reset configuration are fully consistent across the group, enabling hardware reuse and scalable memory selection without PCB redesign.

What LIN protocol versions does the R5F21354ANFP hardware module support?

The R5F21354ANFP's dedicated LIN module supports LIN 2.0 and LIN 2.1 protocol specifications. It handles frame formatting, checksum calculation (classic and enhanced), synchronization field detection, and automatic response timing-offloading these tasks from the CPU. The module relies on UART0 for serial communication and Timer RA for baud rate generation, ensuring deterministic timing critical for automotive body electronics compliance.