Renesas R5F2122AKFP#U0

Overview

R5F2122AKFP from Renesas Electronics is a 16-bit R8C/22 Group microcontroller built on silicon gate CMOS technology, featuring the R8C CPU core, 96 KB flash program memory, 5 KB RAM, and a 48-pin LQFP package. It delivers 50 ns minimum instruction execution time at 20 MHz, integrates one CAN 2.0B module (16 slots), LIN hardware interface, UART, I²C, 10-bit 12-channel ADC, and operates across -40°C to +85°C for automotive and factory automation networking.

For engineers reviewing the R5F2122AKFP datasheet, R5F2122AKFP pinout, R5F2122AKFP application, or R5F2122AKFP equivalent, key selection criteria include CAN/LIN co-integration, flash endurance (1,000 write/erase cycles), single-chip operation with on-chip oscillators, and compatibility with Renesas' R8C development tools and emulator debugger environments.

Technical Context

The R5F2122AKFP implements the R8C CPU core with 89 fundamental instructions and a 1 Mbyte unified address space. Its peripheral set includes Timer RA/RB (8-bit), Timer RD (16-bit × 2 channels with input capture/output compare), Timer RE (compare match), and dual UARTs supporting clock-synchronous serial I/O and LIN protocol via UART0 and Timer RA.

It features two on-chip oscillators (high-speed with frequency adjustment, low-speed), XIN/XOUT crystal interface, on-chip voltage detection and power-on reset, and integrated CAN 2.0B controller with 16 message buffers - all operating within VCC = 3.0–5.5 V at up to 20 MHz.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm lead pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2122AKFP, R5F2123AKFP adds data flash for persistent storage without altering CAN/LIN functionality, while R5F2122CKFP scales memory capacity for more complex firmware - both retain identical timing, I/O, and thermal specifications.

Availability

R5F2122AKFP is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN gateways, smart sensor nodes, and medical diagnostic monitors requiring stable component supply and long-term lifecycle support.

Supply support for R5F2122AKFP 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.

The R5F2122AKFP belongs to the R8C/22 Group - a family of 16-bit MCUs designed for cost-sensitive, real-time embedded applications in automotive and industrial networking where CAN and LIN integration are essential.

FAQ

What is the maximum operating frequency and corresponding supply voltage for R5F2122AKFP?

The R5F2122AKFP supports a maximum operating frequency of 20 MHz at VCC = 3.0–5.5 V. At this speed, minimum instruction execution time is 50 ns. For 10 MHz operation, it supports extended voltage range down to 2.7 V, enabling lower-power operation in battery-backed systems.

Does R5F2122AKFP include on-chip debug support, and what interface does it use?

Yes, the R5F2122AKFP includes full on-chip debug support compatible with Renesas E8 and E10 emulators. It reserves memory addresses 20000h–23FFFh exclusively for emulator use, enabling real-time tracing, breakpoints, and non-intrusive firmware validation without requiring external JTAG adapters.

How many CAN message buffers does R5F2122AKFP provide, and are they configurable?

The R5F2122AKFP provides 16 dedicated CAN message buffers compliant with CAN 2.0B specification. These buffers are fully configurable via special function registers in the 01300h–0147Fh address range, supporting individual acceptance filtering, transmission priority, and data length control per slot.

What is the ADC resolution and channel count on R5F2122AKFP, and which pins support analog input?

The R5F2122AKFP integrates a 10-bit successive-approximation ADC with 12 input channels (AN0–AN11). Analog inputs are mapped to P0_0–P0_7, P1_0–P1_3, and P4_2 (VREF), supporting simultaneous sampling control and programmable conversion triggers from timers or external events.

Is R5F2122AKFP pin-compatible with other members of the R8C/22 Group, and what package type does it use?

Yes, the R5F2122AKFP uses the PLQP0048KB-A 48-pin LQFP package (7 mm × 7 mm, 0.5 mm pitch) and shares identical pin assignments and electrical characteristics with all R8C/22 Group variants including R5F21226JFP, R5F21227JFP, and R5F2122CJFP - enabling drop-in replacement within the same memory and temperature grade.