Renesas R5F21226JFP#U1

Overview

R5F21226JFP from Renesas Electronics is a 16-bit R8C/22 Group microcontroller built on silicon gate CMOS technology, featuring an R8C CPU core, 32 KB flash program memory, 2 KB RAM, and operating at up to 20 MHz (50 ns min instruction time). It integrates a CAN 2.0B module (16-slot), 10-bit 12-channel ADC, UART0/UART1, LIN hardware interface, I²C bus, and multiple timers - designed for automotive and industrial networking applications requiring robust real-time control.

For engineers reviewing the R5F21226JFP datasheet, R5F21226JFP pinout, R5F21226JFP application, or R5F21226JFP equivalent, this MCU delivers deterministic timing, on-chip oscillation with frequency adjustment, integrated voltage detection and power-on reset, and -40°C to +85°C operation in a 48-pin LQFP package - supporting CAN-based ECU development, factory automation nodes, and embedded control systems where flash reprogrammability and peripheral integration are critical.

Technical Context

The R5F21226JFP implements the R8C CPU core with 89 fundamental instructions and a 1 Mbyte unified address space. Its memory architecture separates 32 KB of program flash (mapped from 08000h–0FFFFh) from 2 KB of internal RAM (00400h–00BFFh), with fixed interrupt vectors at 0FFDCh–0FFFFh and dedicated SFR regions including CAN registers at 01300h–0147Fh.

Peripheral integration centers on real-time communication and sensing: one CAN 2.0B controller with 16 message buffers, dual UARTs (UART0 supports LIN master via Timer RA), I²C interface, 16-bit Timer RD with input capture/output compare, and 10-bit A/D converter with 12 analog inputs - all synchronized to a dual-clock system (XIN oscillator + high-speed/low-speed on-chip oscillators).

Key Specifications

Pinout & Package

Package: 48-pin plastic LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm pin pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21226JFP, R5F21226KFP extends thermal capability without changing firmware or layout, while R5F21236JFP adds dedicated data flash for persistent variable storage - both retain full peripheral compatibility and require no software porting effort.

Availability

R5F21226JFP is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN gateways, and smart sensor nodes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F21226JFP 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 automotive, industrial, and IoT markets.

The R8C/22 Group, including R5F21226JFP, was engineered for cost-effective, real-time embedded control in automotive networking and industrial automation - emphasizing CAN/LIN integration, flash reprogrammability, and robust operation across harsh environments.

FAQ

What is the maximum operating frequency of the R5F21226JFP?

The R5F21226JFP operates at a maximum frequency of 20 MHz when supplied with VCC = 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. This speed is supported by its high-speed on-chip oscillator or external crystal/resonator connected to XIN/XOUT pins. The R5F21226JFP maintains full peripheral functionality-including CAN, UART, and ADC-at this clock rate, making it suitable for time-critical automotive and industrial control tasks.

Does the R5F21226JFP include on-chip flash memory for program storage?

Yes, the R5F21226JFP integrates 32 KB of on-chip flash memory for program storage, organized as program ROM. It supports in-system programming (ISP) and has an endurance rating of 1,000 write/erase cycles. This flash is distinct from data flash (not present in R5F21226JFP - only in R8C/23 Group variants like R5F21236JFP), and is used exclusively for firmware execution and constants.

What communication interfaces are integrated into the R5F21226JFP?

The R5F21226JFP integrates UART0 (with LIN hardware support), UART1, I²C bus interface, clock-synchronous serial I/O with chip select (SSI/SCS/SSCK/SSO), and a full CAN 2.0B controller with 16 message slots. These interfaces operate independently and can be used concurrently - for example, UART0 for LIN sensor communication while CAN handles network-level messaging - without shared resource contention.

Is the R5F21226JFP pin-compatible with other members of the R8C/22 Group?

Yes, the R5F21226JFP shares the identical 48-pin PLQP0048KB-A package and pin assignment with all R8C/22 Group variants (e.g., R5F21227JFP, R5F21228JFP). Pin functions, electrical characteristics, and peripheral mappings are consistent across the group - enabling drop-in replacement within the same memory size family, provided firmware accounts for differences in ROM/RAM capacity and feature enablement.

What is the operating temperature range specified for the R5F21226JFP?

The R5F21226JFP is specified for operation from -40°C to +85°C (J version), qualifying it for passenger compartment automotive applications, industrial control panels, and commercial-grade embedded systems. This range is validated per Renesas' Standard quality grade and does not include extended-temperature screening - for under-hood or high-ambient environments, the K version (R5F21226KFP, -40°C to +125°C) is required.