Renesas R5F21133FP#U0

Overview

R5F21133FP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in a 32-pin LQFP package, featuring 12 KB flash program ROM, 768 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. It targets embedded control in household appliances and industrial sensors.

For engineers reviewing the R5F21133FP#U0 datasheet, R5F21133FP#U0 pinout, R5F21133FP#U0 application, or R5F21133FP#U0 equivalent, key selection considerations include its 12 KB flash capacity, 10-bit 12-channel ADC resolution and channel count, dual serial interface support (UART + clock-synchronous), and compatibility with 32-pin LQFP layout for cost-sensitive, low-power MCU designs.

Technical Context

The R5F21133FP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V) or 100 ns (10 MHz XIN, 2.7–5.5 V). Its memory map allocates 1 MB address space, with fixed interrupt vectors at 0FFDC–0FFFF₁₆, program ROM starting at 0C000₁₆, and data flash at 02000–02FFF₁₆.

Peripheral integration includes two independent serial channels (one UART-only, one UART/clock-synchronous selectable), on-chip high-speed and low-speed oscillators with frequency adjustment capability, voltage detection circuitry, power-on reset, and watchdog timer with 15-bit counter and prescaler. All I/O ports support programmable direction and pull-up selection.

Key Specifications

Pinout & Package

Package: 32-pin plastic LQFP (PLQP0032GB-A / 32P6U-A), 7 mm × 7 mm body, 0.8 mm pitch, surface-mount compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21132FP#U0 and R5F21134FP#U0, the R5F21133FP#U0 offers balanced memory resources-12 KB flash and 768 bytes RAM-making it optimal for mid-complexity embedded control where neither memory headroom nor cost minimization dominates the design trade-off.

Availability

R5F21133FP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment requiring stable component supply and long-term production continuity.

Supply support for R5F21133FP#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 R5F21133FP#U0 belongs to the R8C/13 Group within the R8C/Tiny Series-a family designed for cost-effective, low-power 16-bit embedded control in consumer and general industrial applications.

FAQ

What is the maximum operating frequency supported by the R5F21133FP#U0?

The R5F21133FP#U0 supports a maximum external clock frequency of 20 MHz when powered at 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. At 10 MHz with supply voltage down to 2.7 V, the minimum instruction time is 100 ns. The on-chip high-speed oscillator is adjustable but rated for up to 20 MHz operation per the R8C/13 Group specification.

Does the R5F21133FP#U0 include on-chip debug capability?

Yes, the R5F21133FP#U0 integrates an on-chip debugger accessible via pins P00/TxD11 and P37/TxD10/RxD1. This allows in-circuit programming, real-time breakpoint setting, and register inspection without external JTAG adapters. Note that these pins cannot be used for UART1 functions when the debugger is active.

How many analog input channels does the R5F21133FP#U0 ADC support?

The R5F21133FP#U0 features a single 10-bit successive-approximation ADC with 12 analog input channels (AN0–AN11), mapped across P00–P07, P10–P13, and P30–P32. All channels share the same ADC core and are selected via software-controlled channel register settings.

What package type and pin count does the R5F21133FP#U0 use?

The R5F21133FP#U0 is packaged in a 32-pin plastic LQFP (PLQP0032GB-A / 32P6U-A) with 7 mm × 7 mm body size and 0.8 mm lead pitch. This RoHS-compliant package is compatible with standard reflow soldering processes and widely supported in PCB layout tools.

Is the R5F21133FP#U0 suitable for automotive applications?

No, the R5F21133FP#U0 is rated for standard-grade operation (–20°C to +85°C) and is intended for consumer, office, and general industrial equipment-not automotive or safety-critical systems. Renesas specifies separate "High Quality" or "Specific" grade devices for transportation or life-support applications, and this part lacks those qualifications.