Renesas R5F21276KFP#U0

Overview

R5F21276KFP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/27 Group, featuring an R8C CPU core, 32 KB flash program memory, 1.5 KB RAM, and dual 1 KB data flash blocks. It operates at up to 20 MHz (50 ns min instruction time), supports 12-channel 10-bit ADC, two UARTs, I²C, LIN, and real-time clock functionality. It targets automotive control modules requiring extended temperature operation.

For engineers reviewing the R5F21276KFP#U0 datasheet, R5F21276KFP#U0 pinout, R5F21276KFP#U0 application, or R5F21276KFP#U0 equivalent, key selection criteria include its -40°C to +125°C operating range, on-chip data flash for parameter storage, hardware LIN compliance, and 32-pin LQFP package with verified peripheral pin mapping for motor control and sensor interface designs.

Technical Context

The R5F21276KFP#U0 implements the R8C CPU core with 89 fundamental instructions and a 1 Mbyte address space. Its memory subsystem includes 32 KB of flash program ROM (1,000 erase/write cycles) and two independent 1 KB data flash blocks (10,000 cycles), enabling field-updatable configuration storage without disrupting main firmware execution.

Peripheral integration includes Timer RA/RB (8-bit), Timer RC (16-bit with input capture/output compare), Timer RE (real-time clock with compare match), two UART channels, one I²C interface, one clock-synchronous serial I/O with chip select, and a dedicated hardware LIN module using Timer RA and UART0 - all mapped to confirmed 32-pin LQFP pins per Renesas documentation.

Key Specifications

Pinout & Package

Package: 32-pin molded-plastic LQFP (PLQP0032GB-A), 7 mm × 7 mm body, 0.8 mm lead pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21276KFP#U0, the R5F21276JFP trades thermal robustness for cost in moderate-temperature environments, while the R5F21274KFP retains full K-version reliability at lower memory capacity - both require no PCB redesign but differ in firmware scalability and thermal deployment scope.

Availability

R5F21276KFP#U0 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and medical diagnostic handsets requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F21276KFP#U0 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/27 Group, including R5F21276KFP#U0, was designed for cost-sensitive, thermally demanding embedded control applications requiring integrated LIN, data flash, and high-reliability operation in automotive and industrial settings.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time for R5F21276KFP#U0?

The R5F21276KFP#U0 supports a maximum operating frequency of 20 MHz with a minimum instruction execution time of 50 ns under VCC = 3.0–5.5 V conditions. This timing is validated for the K version and enables deterministic real-time response in motor control and LIN communication tasks within the R5F21276KFP#U0's specified thermal envelope.

Does R5F21276KFP#U0 include on-chip data flash, and what is its endurance rating?

Yes, the R5F21276KFP#U0 includes two independent 1 KB data flash blocks with a guaranteed endurance of 10,000 write/erase cycles. This capability is explicitly documented for the R8C/27 Group and enables reliable storage of calibration data, device configuration, or firmware update staging without external EEPROM in the R5F21276KFP#U0 design.

What is the qualified operating temperature range for R5F21276KFP#U0?

The R5F21276KFP#U0 is the K-version variant, qualified for continuous operation from -40°C to +125°C ambient temperature. This rating is confirmed in Renesas' R8C/27 Group documentation and aligns with AEC-Q100 Grade 2 requirements for under-hood automotive applications where the R5F21276KFP#U0 is commonly deployed.

Which serial interfaces are supported by R5F21276KFP#U0, and are they hardware-accelerated?

The R5F21276KFP#U0 integrates two UART channels (UART0/UART1), one I²C bus interface, one clock-synchronous serial I/O with chip select, and a dedicated hardware LIN module. All are implemented in silicon - the LIN function uses UART0 and Timer RA resources without software bit-banging, ensuring deterministic timing compliance per LIN 2.x specifications in the R5F21276KFP#U0 implementation.

What package type and pin count does R5F21276KFP#U0 use, and is pinout information publicly available?

The R5F21276KFP#U0 uses a 32-pin LQFP package designated PLQP0032GB-A (7 mm × 7 mm, 0.8 mm pitch). Full pin assignments and functions - including multiplexed roles for ADC, UART, I²C, and timers - are published in Renesas document REJ03B0168-0210, confirming all 32 pins' electrical behavior and physical layout for the R5F21276KFP#U0.