Renesas R5F21114FP#U0

Overview

R5F21114FP from Renesas Electronics is a 16-bit Flash microcontroller in the R8C/11 Group, built on the R8C/Tiny Series CPU core and packaged in a 32-pin LQFP (PLQP0032GB-A). It delivers 50 ns minimum instruction execution at 20 MHz, integrates a 10-bit 12-channel ADC, three 8-bit timers (X/Y/Z), one 16-bit Timer C with input capture/output compare, dual UART interfaces, and operates across 2.7–5.5 V supply for use in sensor-based housing equipment and industrial control panels.

For engineers reviewing the R5F21114FP datasheet, R5F21114FP pinout, R5F21114FP application, or R5F21114FP equivalent, key selection criteria include its -20°C to +85°C operating range, 16 KB Flash / 1 KB RAM memory configuration, integrated high-speed on-chip oscillator with frequency adjustment, and support for LED drive on P10–P17 ports in cost-sensitive embedded systems.

Technical Context

The R5F21114FP implements the R8C/Tiny CPU core with 89 basic instructions and a 1 Mbyte address space. Its memory map allocates fixed interrupt vectors at 0FFDC₁₆–0FFFF₁₆, 16 KB Flash starting at 0C000₁₆, and 1 KB RAM from 00400₁₆–007FF₁₆. The SFR region (00000₁₆–002FF₁₆) hosts peripheral control registers including WDTS, CM0/CM1, HR0/HR1, and INTxIC registers.

It features two independent clock generation circuits: a main crystal/resonator interface (XIN/XOUT) and an on-chip oscillator with high-speed (adjustable) and low-speed modes. Oscillation stop detection, voltage detection (VCR1/VCR2), and power-on reset are hardware-integrated. Peripheral clock gating supports Wait (35 µA) and Stop (0.7 µA) low-power modes.

Key Specifications

Pinout & Package

Package: 32-pin plastic LQFP (PLQP0032GB-A, JEDEC MS-026AC variant), 7 mm × 7 mm body, 0.8 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21114DFP, the R5F21114FP trades extended temperature range for cost savings in climate-controlled settings; compared with R5F21113FP, it provides 4 KB additional Flash and 256 B more RAM for enhanced feature sets or future firmware updates without hardware change.

Availability

R5F21114FP is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment requiring stable component supply with long-term production support.

Supply support for R5F21114FP 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/11 Group targets cost-sensitive, low-power embedded applications in consumer and industrial equipment, emphasizing integration of analog peripherals, robust I/O, and efficient 16-bit processing without external support components.

FAQ

What is the maximum operating frequency of the R5F21114FP?

The R5F21114FP achieves a minimum instruction execution time of 50 ns when operating at 20 MHz with VCC = 3.0–5.5 V. This corresponds to a maximum system clock frequency of 20 MHz using the main crystal oscillator or high-speed on-chip oscillator. At 10 MHz, the minimum instruction time is 100 ns with VCC = 2.7–5.5 V. The R5F21114FP does not support frequencies above 20 MHz.

Does the R5F21114FP support in-system programming?

Yes, the R5F21114FP supports in-system programming via its on-chip debug interface using pins P00 (TxD11) and P37 (RxD1). No external programmer hardware is required - firmware updates can be performed through UART0 or UART1 using Renesas' standard flash programming protocol. The R5F21114FP's Flash memory has 100 program/erase cycles rated endurance.

What are the analog input capabilities of the R5F21114FP?

The R5F21114FP integrates a single 10-bit successive-approximation ADC with 12 configurable input channels (AN0–AN11), supporting simultaneous sampling across multiple sensors. Input voltage range is 0 V to AVcc (typically tied to Vcc), and reference voltage (VREF) can be externally supplied or internally derived. The ADC is accessible via dedicated SFRs and supports interrupt-driven conversion completion.

Can the R5F21114FP drive LEDs directly?

Yes, ports P10–P17 on the R5F21114FP are designated as LED drive I/Os capable of sinking up to 20 mA per pin. These pins support direct connection to common-anode LEDs without external current-limiting transistors. The R5F21114FP's I/O direction registers allow individual pin configuration, and internal pull-ups can be enabled for open-drain-like behavior when needed.

Is there hardware support for low-power operation in the R5F21114FP?

Yes, the R5F21114FP provides two ultra-low-power modes: Wait mode (typ. 35 µA at 3.0 V, peripheral clocks off) and Stop mode (typ. 0.7 µA at 3.0 V with RAM retention). Both modes retain register and RAM contents and wake via external interrupt, timer overflow, or reset. The R5F21114FP's voltage detection circuit and programmable watchdog timer further enhance reliability during low-power operation.