Renesas R5F21134FP#U0

Overview

R5F21134FP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in a 32-pin LQFP package, featuring 16 KB flash program ROM, 1 KB RAM, dual UART interfaces (one with clock-synchronous capability), twelve-channel 10-bit ADC, and three 8-bit timers plus one 16-bit timer with input capture/output compare - deployed in household appliance motor control and sensor interface modules.

For engineers reviewing the R5F21134FP#U0 datasheet, R5F21134FP#U0 pinout, R5F21134FP#U0 application, or R5F21134FP#U0 equivalent, key selection criteria include its -20°C to +85°C operating range, 2.7–5.5 V supply voltage support, on-chip high-speed oscillator with frequency adjustment, data flash (2 KB × 2 blocks) for parameter storage, and integrated voltage detection and watchdog timer for robust embedded operation.

Technical Context

The R5F21134FP#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). Its memory map allocates 1 MB address space, with fixed interrupt vectors at 0FFDC₁₆–0FFFF₁₆, program ROM starting at 0C000₁₆, and data flash at 02000₁₆–02FFF₁₆.

Peripheral integration includes two independent serial interfaces (UART0 with clock-synchronous mode, UART1), LED drive-capable I/O ports (P10–P17), and analog subsystem with AVcc/AVss power rails, VREF input, and selectable pull-up resistors on input ports - all managed via dedicated SFRs such as CM0/CM1 for clock control and ADIC for A/D interrupt configuration.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21133FP and R5F21134DFP, the R5F21134FP#U0 provides optimal balance of memory headroom and commercial-grade thermal specification - making it ideal for cost-sensitive, indoor-targeted embedded systems where full industrial rating is unnecessary.

Availability

R5F21134FP#U0 is available at Aetrix Electronics and suitable for home appliance motor control, office equipment sensor interface, and housing security keypad applications requiring stable component supply across multi-year production cycles.

Supply support for R5F21134FP#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 - designed for cost-effective, low-power embedded control in consumer and industrial appliances where compact code size and integrated analog peripherals are essential.

FAQ

What is the maximum operating frequency supported by the R5F21134FP#U0?

The R5F21134FP#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 reduced supply voltages (2.7–5.5 V), the device operates up to 10 MHz with 100 ns instruction timing - verified in Table 1.1 of the R8C/13 Group datasheet Rev.1.20.

Does the R5F21134FP#U0 include on-chip debug capability?

Yes, the R5F21134FP#U0 supports on-chip debugging via dedicated pins (P00/AN7/TxD11 and P37/TxD10/RxD1), but these pins must be reserved exclusively for debugger use and cannot serve dual functions during debug sessions - confirmed in Figure 1.3 and Note 2 of the pin assignment documentation.

How is the data flash memory organized in the R5F21134FP#U0?

The R5F21134FP#U0 contains 4 KB of data flash memory structured as two independent 2 KB blocks (Block A and Block B) located at addresses 02000₁₆–02FFF₁₆, each rated for 10,000 erase/write cycles and accessible via dedicated SFRs including WDTSR and PRCDR - as defined in Section 3 and Table 1.2 of the R8C/13 Group datasheet.

Can the R5F21134FP#U0 operate from a single 3.3 V supply?

Yes, the R5F21134FP#U0 operates reliably at 3.3 V within its specified 2.7–5.5 V range, delivering typical current consumption of 5 mA at 10 MHz and 35 µA in Wait mode - enabling direct compatibility with common 3.3 V system rails without level-shifting or regulation overhead.

What peripheral resources are shared with I/O pins on the R5F21134FP#U0?

Multiple peripherals share pins with general-purpose I/O: P00 serves as AN7, TxD11, and RESET release function; P15/P14 are RxD0/TxD0; P37/P30/P00 handle UART1 signals; and P10–P13 double as AN8–AN11 and KI0–KI3 - all detailed in Table 1.3 and Figure 1.3 of the R8C/13 Group datasheet.