Renesas R5F21114FP#W4

Overview

R5F21114FP#W4 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 time at 20 MHz, integrates 16 KB Flash memory and 1 KB RAM, and features a 10-bit 12-channel A/D converter, three 8-bit timers, one 16-bit timer, UART and clock-synchronous serial interfaces, and on-chip high-speed/low-speed oscillators. It targets cost-sensitive embedded control in household appliances and industrial sensors.

For engineers reviewing the R5F21114FP#W4 datasheet, R5F21114FP#W4 pinout, R5F21114FP#W4 application, or R5F21114FP#W4 equivalent, key selection considerations include its -20°C to +85°C operating range, 3.0–5.5 V supply voltage, integrated LED drive capability on P10–P17, and dual serial interface support (UART0 + UART1/clock-sync) for sensor node and appliance HMI communication.

Technical Context

The R5F21114FP#W4 implements the R8C/Tiny CPU core with 89 basic instructions and a 1 Mbyte linear address space. Its memory subsystem includes 16 KB on-chip Flash (100 write/erase cycles) and 1 KB SRAM, mapped into fixed SFR (00000h–002FFh), RAM (00400h–007FFh), and ROM (0C000h–0FFFFh) regions. The interrupt system supports 11 internal, 5 external, and 4 software sources across 7 priority levels.

Peripheral integration centers on mixed-signal control: a 10-bit A/D converter with 12 analog inputs (AN0–AN11), three independent 8-bit timers (X/Y/Z) with prescalers, a 16-bit Timer C with input capture/output compare, and dual serial channels-one UART-only (Ch0), one selectable between UART and clock-synchronous mode (Ch1). Clock generation includes main crystal/resonator support (XIN/XOUT), plus adjustable high-speed and fixed low-speed on-chip oscillators.

Key Specifications

Pinout & Package

Package: 32-pin plastic LQFP (PLQP0032GB-A), 7 mm × 7 mm body, 0.8 mm lead 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 R5F21113FP and R5F21114DFP, the R5F21114FP#W4 offers the largest on-chip memory (16 KB Flash/1 KB RAM) within the standard-temperature R8C/11 FP family, enabling more complex control algorithms and larger configuration tables while maintaining full pin and peripheral compatibility.

Availability

R5F21114FP#W4 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment HMI requiring stable component supply and long-term production continuity.

Supply support for R5F21114FP#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/11 Group targets cost-optimized 16-bit embedded control in consumer and industrial applications, emphasizing low power, integrated peripherals, and ease of migration within the R8C/Tiny architecture.

FAQ

What is the maximum operating frequency and corresponding supply voltage for the R5F21114FP#W4?

The R5F21114FP#W4 operates at up to 20 MHz when supplied with 3.0–5.5 V. At 10 MHz, it supports a reduced voltage range of 2.7–5.5 V. This dual-voltage/frequency specification allows flexible system-level power optimization - for example, running at 20 MHz/5 V for peak performance or 10 MHz/3.3 V to minimize active power in battery-powered nodes. The R5F21114FP#W4 datasheet confirms these ratings in Table 1.1.

Does the R5F21114FP#W4 support in-circuit debugging, and what pins are required?

Yes, the R5F21114FP#W4 supports on-chip debugging via the single-wire background debug interface. Pins P00/AN7/TxD11 and P37/TxD10/RxD1 are reserved for debug communication and must not be used for application I/O when debugging is enabled. The MODE pin configures debug mode entry, and RESET initiates debug initialization. Full debug functionality requires Renesas E8/E8a emulators and associated software tools. The R5F21114FP#W4 hardware design must isolate these pins from conflicting peripherals.

How many analog input channels does the R5F21114FP#W4 A/D converter support, and which pins are assigned?

The R5F21114FP#W4 integrates a single 10-bit successive-approximation A/D converter with 12 analog input channels (AN0–AN11). These map to physical pins as follows: AN0–AN7 on P00–P07; AN8–AN11 on P10–P13. All channels share one common reference (VREF, tied to VCC) and one analog ground (AVSS). Channel selection is software-controlled via the ADPC register, and conversion results are stored in the 16-bit ADR register. This configuration is confirmed in Section 1.2 and Figure 1.3 of the R5F21114FP#W4 datasheet.

What are the power consumption characteristics of the R5F21114FP#W4 in low-power modes?

The R5F21114FP#W4 provides two ultra-low-power states: Wait mode draws 35 µA at 3.0 V with peripheral clocks disabled, and Stop mode consumes just 0.7 µA at 3.0 V. Both modes retain RAM content and allow wake-up via external interrupts (INT0–INT3), key inputs (KI0–KI3), or timer events. These values are measured under specified conditions (VCC = 3.0 V, Ta = 25°C) and enable multi-year battery life in intermittent-sensing applications. The R5F21114FP#W4 achieves this via gated clock domains and deep-sleep retention circuits.

Is the R5F21114FP#W4 pin-compatible with other devices in the R8C/11 Group, and what does the "FP" suffix indicate?

Yes, all R8C/11 Group devices with the "FP" suffix - including R5F21112FP, R5F21113FP, and R5F21114FP - share identical 32-pin LQFP (PLQP0032GB-A) packaging and fully compatible pinouts. The "FP" denotes the PLQP0032GB-A package type, while the numeric digit (2/3/4) specifies Flash capacity (8/12/16 KB). This uniformity allows hardware reuse across firmware variants. The R5F21114FP#W4 pin assignment matches Figure 1.3 and Table 1.3 in the official Renesas documentation.