Renesas R5F21134FP#W4

Overview

R5F21134FP#W4 from Renesas Electronics is a 16-bit CMOS microcontroller in the R8C/13 Group, built on the R8C/Tiny Series CPU core. It features 16 KB program flash ROM, 1 KB RAM, 4 KB data flash (2 KB × 2 blocks), 10-bit 12-channel ADC, three 8-bit timers (X/Y/Z), one 16-bit Timer C with input capture/output compare, dual UART/clock-synchronous serial interfaces, and operates from 2.7–5.5 V across –20 to +85°C. It targets embedded control in household appliances and industrial sensors.

For engineers reviewing the R5F21134FP#W4 datasheet, R5F21134FP#W4 pinout, R5F21134FP#W4 application, or R5F21134FP#W4 equivalent, key selection criteria include its 32-pin LQFP package, integrated data flash for parameter storage, low-power Stop mode (0.7 µA), and dual serial interfaces supporting both UART and clock-synchronous protocols in cost-sensitive 16-bit control designs.

Technical Context

The R5F21134FP#W4 implements the R8C/Tiny CPU core with 89 basic instructions and executes at 50 ns min instruction time (20 MHz XIN, 3.0–5.5 V). Its memory map spans 1 MB address space, with fixed interrupt vectors at 0FFDC–0FFFF₁₆, program ROM starting at 0C000₁₆, and data flash at 02000–02FFF₁₆.

It integrates two independent clock generation circuits: a main crystal/resonator oscillator (XIN/XOUT) and an adjustable high-speed on-chip oscillator, plus low-speed on-chip oscillator. Oscillation stop detection, voltage detection, and power-on reset are hardware-supported, enabling robust operation in variable supply environments without external supervision circuitry.

Key Specifications

Pinout & Package

Package: 32-pin plastic LQFP (PLQP0032GB-A / 32P6U-A), 7 mm × 7 mm, 0.8 mm pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21134DFP, the R5F21134FP#W4 offers identical functionality at standard temperature grade, while R5F21133FP provides a lower-memory variant with full pin and peripheral compatibility-enabling scalable design reuse across product tiers without layout revision.

Availability

R5F21134FP#W4 is available at Aetrix Electronics and suitable for electric household appliance control, industrial sensor nodes, and office equipment requiring stable component supply and long-term production continuity.

Supply support for R5F21134FP#W4 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 R8C/13 Group belongs to the R8C/Tiny Series MCU family, designed for cost-effective, low-power 16-bit embedded control in consumer and industrial applications where integration, reliability, and ease of development are critical.

FAQ

What is the maximum operating frequency supported by the R5F21134FP#W4?

The R5F21134FP#W4 supports a maximum external clock frequency of 20 MHz on the XIN pin when VCC is 3.0–5.5 V, yielding a minimum instruction execution time of 50 ns. At 10 MHz, it operates down to 2.7 V. The on-chip high-speed oscillator also supports adjustable frequencies without external components.

Does the R5F21134FP#W4 include hardware debug support?

Yes, the R5F21134FP#W4 supports on-chip debugging via dedicated pins (P00/AN7/TxD11 and P37/TxD10/RxD1), but these pins must be unused during debug session. The MCU implements Renesas' standard on-chip debugger interface compatible with E8/E8a emulators and associated IDE toolchains.

How is the data flash memory organized in the R5F21134FP#W4?

The R5F21134FP#W4 contains 4 KB of data flash memory divided into two independent 2 KB blocks (Block A and Block B), located at addresses 02000–02FFF₁₆. Each block supports 10,000 erase/write cycles and can be programmed/erased separately under VCC = 2.7–5.5 V, enabling wear-leveling and safe parameter updates.

Can the R5F21134FP#W4 operate from a single 3.3 V supply?

Yes, the R5F21134FP#W4 operates across 2.7–5.5 V, making it fully compatible with 3.3 V systems. At 10 MHz, it functions down to 2.7 V; at 20 MHz, minimum VCC is 3.0 V. All I/Os are 5 V tolerant when VCC ≥ 3.0 V, simplifying interface with legacy 5 V peripherals.

What peripheral resources are shared between the two UART channels in the R5F21134FP#W4?

UART0 and UART1 are physically independent modules. However, UART1's TxD10/RxD1 signals share pin P37, and TxD11 shares pin P00. These multiplexed pins require software configuration to assign UART1 functionality, and concurrent use of TxD10/TxD11 on the same pin is not possible. No register or buffer sharing occurs between the channels.