Renesas R5F21132FP#U0

Overview

R5F21132FP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in a 32-pin LQFP package, featuring 8 KB flash program ROM, 512 bytes RAM, and 4 KB data flash (2 KB × 2 blocks). It integrates an 8-bit × 3-channel timer (X/Y/Z), one 16-bit Timer C with input capture/output compare, dual UART/serial interfaces, a 10-bit 12-channel ADC, and operates from 2.7–5.5 V across –20 to +85°C ambient temperature - deployed in household appliance motor control and sensor interface modules.

For engineers reviewing the R5F21132FP#U0 datasheet, R5F21132FP#U0 pinout, R5F21132FP#U0 application, or R5F21132FP#U0 equivalent, key selection criteria include its 32-pin PLQP0032GB-A LQFP footprint, 10 MHz/20 MHz dual-frequency operation under varying supply voltage, integrated on-chip high-speed oscillator with frequency adjustment, and support for wait/stop low-power modes down to 35 µA and 0.7 µA respectively.

Technical Context

The R5F21132FP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and executes at 50 ns minimum instruction time (20 MHz, 3.0–5.5 V) or 100 ns (10 MHz, 2.7–5.5 V), supported by two register banks and 1-Mbyte address space. Its memory subsystem includes fixed interrupt vector table at 0FFDC₁₆–0FFFF₁₆, program ROM mapped from 0C000₁₆, and data flash at 02000₁₆–02FFF₁₆.

Peripheral integration centers on dual serial channels (UART0 with clock-synchronous option, UART1), 12-channel 10-bit ADC with internal reference, three independent 8-bit timers plus one 16-bit Timer C, and dedicated LED drive capability on P10–P17 I/O ports. System-level features include oscillation stop detection, voltage detection circuit, power-on reset, and watchdog timer with prescaler and reset-start function.

Key Specifications

Pinout & Package

Package: 32-pin 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 microcontroller applications.

Compared with R5F21132FP#U0, R5F21133FP#U0 offers expanded memory for complex control algorithms, while R5F21132DFP#U0 provides wider thermal tolerance without altering code or layout - both retain identical pinout, peripheral configuration, and instruction set compatibility.

Availability

R5F21132FP#U0 is available at Aetrix Electronics and suitable for home appliance motor control, office equipment sensor interface, and housing security panel applications requiring stable component supply and long-term industrial availability.

Supply support for R5F21132FP#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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.

The R8C/13 Group belongs to the R8C/Tiny Series MCU family, designed specifically for cost-sensitive, low-power embedded control in consumer and industrial equipment where compact code size and integrated peripherals reduce system complexity.

FAQ

What is the maximum operating frequency of the R5F21132FP#U0?

The R5F21132FP#U0 supports a maximum operating frequency of 20 MHz when supplied at 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. At 2.7–5.5 V, it operates up to 10 MHz with 100 ns minimum instruction time - both modes are fully specified and tested per Renesas datasheet Rev.1.20.

Does the R5F21132FP#U0 include an internal oscillator?

Yes, the R5F21132FP#U0 integrates both a high-speed on-chip oscillator (adjustable frequency) and a low-speed on-chip oscillator. The high-speed oscillator eliminates the need for an external crystal in many applications, and its frequency can be tuned via HR0/HR1 registers per the R8C/13 Group hardware manual.

How much data flash memory does the R5F21132FP#U0 have?

The R5F21132FP#U0 contains 4 KB of data flash memory organized as two independent 2 KB blocks. This memory is rated for 10,000 write/erase cycles and is used for non-volatile parameter storage, calibration data, or firmware update staging - separate from the 8 KB program flash.

What is the purpose of the IVcc pin on the R5F21132FP#U0?

The IVcc pin on the R5F21132FP#U0 stabilizes the internal power supply for analog and reset circuits. It must be connected to Vss via a 0.1 µF capacitor and must not be tied to Vcc. This dedicated decoupling ensures accurate voltage detection, stable ADC reference, and reliable reset behavior under dynamic load conditions.

Can the R5F21132FP#U0 operate in low-power modes?

Yes, the R5F21132FP#U0 supports multiple low-power modes: Wait mode draws typ. 35 µA at 3.0 V with peripheral clocks stopped, and Stop mode draws typ. 0.7 µA at 3.0 V. Both modes retain RAM content and allow wake-up via external interrupt, key input, or timer event - essential for battery-powered sensor nodes.