Renesas R5F21334TNFP#30

Overview

R5F21334TNFP#30 from Renesas Electronics is a 16-bit R8C CPU core microcontroller 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 10-bit × 12-channel ADC, hardware LIN module, and electrostatic capacitive touch detection for consumer appliance control.

For engineers reviewing the R5F21334TNFP#30 datasheet, R5F21334TNFP#30 pinout, R5F21334TNFP#30 application, or R5F21334TNFP#30 equivalent, key selection criteria include its 32-pin LQFP package, −20°C to +85°C industrial temperature grade, on-chip high-speed/low-speed oscillators, and integrated sensor control unit for touch interface design.

Technical Context

The R5F21334TNFP#30 implements the R8C CPU core with 89 fundamental instructions and a dedicated 16×16→32-bit multiplier for efficient signal processing. Its memory map spans 1 Mbyte, with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash at 03000h–03FFFh.

Peripheral integration includes three independent timers (RA: 8-bit, RB: 8-bit PWM-capable, RC: 16-bit with 4 capture/compare registers), dual UART/I²C-capable serial interfaces (UART0 and UART2), and a dedicated LIN module built around Timer RA and UART0 - all controllable via dedicated SFRs mapped in the 0000h–02FFFh address space.

Key Specifications

Pinout & Package

32-pin LQFP package (PLQP0032GB-A), 7 mm × 7 mm body, 0.8 mm pin pitch, exposed pad not specified. Pin functions support multiplexed peripheral assignment via software configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21334TNFP#30, R5F21335TNFP offers moderate memory headroom for mid-complexity appliances, while R5F21336TNFP targets high-feature embedded systems requiring sustained code growth - all share identical pinout, peripherals, and package.

Availability

R5F21334TNFP#30 is available at Aetrix Electronics and suitable for home appliance control, office equipment interface, and consumer audio remote applications requiring stable component supply across production lifecycles.

Supply support for R5F21334TNFP#30 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, and power solutions for automotive, industrial, and consumer markets.

The R8C/33T Group, including R5F21334TNFP#30, was designed for cost-sensitive, low-power embedded control in white goods and human-machine interface applications - emphasizing integration, EMI resilience, and capacitive touch capability.

FAQ

What is the maximum operating frequency of the R5F21334TNFP#30 and under what voltage conditions?

The R5F21334TNFP#30 achieves a maximum operating frequency of 20 MHz when powered at VCC = 2.7 V to 5.5 V. At lower supply voltages (1.8 V to 5.5 V), the maximum frequency is reduced to 5 MHz to maintain timing margin and stability. This dual-frequency capability allows flexible power/performance trade-offs in battery-operated or wide-input-voltage designs.

Does the R5F21334TNFP#30 support in-system programming and how is it implemented?

Yes, the R5F21334TNFP#30 supports in-system programming via its on-chip debug interface and background operation (BGO) function. The 4 KB data flash (1 KB × 4 blocks) can be rewritten while the CPU executes application code, enabling firmware updates without halting operation. Programming and erasure require VCC = 2.7–5.5 V and are rated for 10,000 cycles.

What peripheral resources does the R5F21334TNFP#30 provide for capacitive touch sensing?

The R5F21334TNFP#30 integrates a dedicated Sensor Control Unit supporting electrostatic capacitive touch detection on up to 18 channels (CH0–CH17), plus three system channels (CHxA–CHxC). These share physical pins with general-purpose I/O and ADC inputs, allowing flexible layout without additional ICs. The unit handles charge-transfer measurement autonomously, reducing CPU load during touch polling.

How many interrupt vectors does the R5F21334TNFP#30 support and what priority levels are available?

The R5F21334TNFP#30 supports 69 interrupt vectors, including 7 external interrupts (INT0–INT3, key inputs KI0–KI3) and peripheral-specific sources like UART, ADC, and timer events. Interrupt priority is managed across 7 configurable levels (IPL 0–6), with higher-numbered levels preempting lower ones. The IPL register in the FLG flag controls active priority masking during service routines.

Is the R5F21334TNFP#30 pin-compatible with other members of the R8C/33T Group?

Yes, the R5F21334TNFP#30 is pin-compatible with all R8C/33T Group variants in the same 32-pin LQFP package (PLQP0032GB-A), including R5F21335TNFP and R5F21336TNFP. Identical pin assignments, peripheral mappings, and electrical characteristics allow direct substitution where memory requirements permit - no PCB redesign is needed.