Renesas R5F21334TNFP#50

Overview

R5F21334TNFP#50 from Renesas Electronics is a 16-bit R8C CPU core MCU with 16 KB program flash, 1.5 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It operates at up to 20 MHz (VCC = 2.7–5.5 V), integrates 12-channel 10-bit ADC, LIN hardware module, and electrostatic capacitive touch detection for appliance control systems.

For engineers reviewing the R5F21334TNFP#50 datasheet, R5F21334TNFP#50 pinout, R5F21334TNFP#50 application, or R5F21334TNFP#50 equivalent, key selection criteria include its 32-pin LQFP package, voltage detection circuit with selectable levels, low-power wait/stop modes (3.5 µA / 2.0 µA), and integrated sensor control unit for touch interface design.

Technical Context

The R5F21334TNFP#50 implements the R8C CPU core with 89 fundamental instructions and hardware multiplier (16×16→32 bits), enabling efficient signal processing in resource-constrained embedded systems. Its memory map allocates 1 Mbyte address space, with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash at 03000h–03FFFh.

Peripheral integration includes three independent timers (RA, RB, RC), dual UART/I²C-capable serial interfaces (UART0 and UART2), watchdog timer with low-speed on-chip oscillator option, and DTC for autonomous data transfers-supporting deterministic real-time response in appliance motor control and user-interface subsystems.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (PLQP0032GB-A, 7 mm × 7 mm body, 0.8 mm pin pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21335TNFP and R5F21336TNFP, the R5F21334TNFP#50 provides optimal cost-performance balance for mid-tier appliances where 16 KB flash and 1.5 KB RAM meet functional requirements without over-provisioning.

Availability

R5F21334TNFP#50 is available at Aetrix Electronics and suitable for home appliance control, office equipment UI, audio system remote interface, and consumer IoT sensor hub applications requiring stable component supply across production lifecycles.

Supply support for R5F21334TNFP#50 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 consumer markets.

The R8C/33T Group is designed for cost-sensitive, low-power embedded control in consumer electronics-emphasizing integrated analog peripherals, capacitive touch, and robust EMI/EMS performance for noisy appliance environments.

FAQ

What is the maximum operating frequency of the R5F21334TNFP#50?

The R5F21334TNFP#50 supports a maximum operating frequency of 20 MHz when powered at 2.7–5.5 V using the XIN clock source. At lower voltages (1.8–5.5 V), it operates up to 5 MHz. The high-speed on-chip oscillator provides a factory-adjustable internal clock source, eliminating the need for external crystals in less timing-critical applications. This dual-clock flexibility makes the R5F21334TNFP#50 adaptable across diverse power and precision requirements.

Does the R5F21334TNFP#50 support in-system programming via its serial interfaces?

Yes, the R5F21334TNFP#50 supports on-chip debug and in-system programming through its built-in debug interface. While UART0 and UART2 provide communication paths, firmware updates to program ROM or data flash require the dedicated on-chip debug port-not standard UART bootloading. The device includes ROM code protection and ID code check features to secure intellectual property during field updates. This ensures safe, authenticated reprogramming of the R5F21334TNFP#50 in deployed systems.

How many analog input channels does the R5F21334TNFP#50 ADC support, and what is its resolution?

The R5F21334TNFP#50 integrates a 10-bit resolution successive-approximation ADC with 12 dedicated analog input channels (AN0–AN11), plus three additional channels (CHxA, CHxB, CHxC) for electrostatic capacitive touch sensing. The ADC includes sample-and-hold functionality and sweep mode for automatic channel sequencing. This configuration allows simultaneous monitoring of multiple sensors-such as thermistors, potentiometers, and touch electrodes-without external multiplexers, directly supporting the R5F21334TNFP#50's role in appliance and UI subsystems.

What low-power modes are available on the R5F21334TNFP#50, and what are their typical current draws?

The R5F21334TNFP#50 offers wait mode (typ. 3.5 µA at 3.0 V) and stop mode (typ. 2.0 µA at 3.0 V) for ultra-low-power operation. In wait mode, the CPU halts while peripherals remain active; in stop mode, both CPU and most peripherals are disabled except for reset and selected wake-up sources. These modes are controlled via system clock registers (CM0/CM1) and supported by the low-speed on-chip oscillator for watchdog timing. This enables extended battery life in portable devices using the R5F21334TNFP#50 as the primary controller.

Is the R5F21334TNFP#50 pin-compatible with other members of the R8C/33T Group?

Yes, the R5F21334TNFP#50 is pin-compatible with all R8C/33T Group variants in the PLQP0032GB-A (32-pin LQFP) package-including R5F21335TNFP and R5F21336TNFP. All share identical pin assignments, electrical characteristics, and peripheral mappings. This allows hardware reuse across product tiers: a single PCB layout can accommodate different memory configurations by changing only the firmware image and BOM, simplifying design scalability and inventory management for the R5F21334TNFP#50 and its higher-memory siblings.