Renesas R5F21334CNFP#30

Overview

R5F21334CNFP#30 from Renesas Electronics is a 16-bit R8C CPU core MCU with 16 KB flash program ROM, 1.5 KB RAM, and 4 KB data flash (1 KB × 4 blocks) supporting background operation (BGO). It operates at up to 20 MHz (V_CC = 2.7–5.5 V), integrates 10-bit × 12-channel A/D converter, dual 8-bit D/A converters, LIN hardware module, and real-time clock (Timer RE), targeting embedded control in consumer audio and office equipment.

For engineers reviewing the R5F21334CNFP#30 datasheet, R5F21334CNFP#30 pinout, R5F21334CNFP#30 application, or R5F21334CNFP#30 equivalent, key selection criteria include its 32-pin LQFP package, -20°C to +85°C operating range (N version), integrated LIN transceiver capability via Timer RA and UART0, and BGO-enabled in-system reprogramming of data flash without halting CPU execution.

Technical Context

The R5F21334CNFP#30 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit hardware multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte (00000h–FFFFFh), with program ROM starting at 0C000h, data flash at 03000h–03FFFh, and RAM at 00400h–009FFh.

It features four independent clock sources - XIN/XOUT (up to 20 MHz), XCIN/XCOUT (32 kHz), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator - with programmable frequency division (1/2/4/8/16) and oscillation stop detection. Power management includes wait mode (3.5 µA @ 3.0 V, 32 kHz) and stop mode (2.0 µA).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21334CNFP#30, the R5F21334CDFP enables deployment in colder environments without derating, while the R5F21332CNFP reduces bill-of-materials cost where memory headroom is not required - both retain identical pinout, software compatibility, and peripheral feature set.

Availability

R5F21334CNFP#30 is available at Aetrix Electronics and suitable for consumer audio systems, office equipment controllers, and household appliance user interfaces requiring stable component supply and long-term production continuity.

Supply support for R5F21334CNFP#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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The R8C/33C Group, including R5F21334CNFP#30, was designed for cost-effective, low-power embedded control in consumer electronics - emphasizing integration of LIN, ADC/DAC, and real-time clock to reduce system component count.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F21334CNFP#30?

The R5F21334CNFP#30 operates at up to 20 MHz when supplied with 2.7–5.5 V, and supports reduced-frequency operation down to 5 MHz at 1.8 V. This dual-voltage flexibility allows use in both battery-powered portable devices and mains-powered consumer appliances without level-shifting circuitry. The R5F21334CNFP#30's on-chip voltage detection circuits ensure reliable reset behavior across this full range.

Does the R5F21334CNFP#30 support in-system programming of its data flash memory?

Yes, the R5F21334CNFP#30 supports background operation (BGO) for data flash, enabling erase and program operations while the CPU executes application code. Its 4 KB data flash is organized as four 1 KB blocks, each independently erasable, and rated for 10,000 write/erase cycles. This capability is essential for logging, calibration storage, or firmware parameter updates in deployed R5F21334CNFP#30-based systems.

How many analog-to-digital converter channels does the R5F21334CNFP#30 provide, and what is their resolution?

The R5F21334CNFP#30 integrates a 10-bit successive-approximation ADC with 12 input channels (AN0–AN11), supporting sample-and-hold and hardware sweep mode. All channels share a common reference (VREF or AVCC), and conversion results are stored in dedicated SFRs (AD0–AD7). This ADC configuration meets precision sensing requirements in R5F21334CNFP#30-based audio mixers, appliance thermistors, and panel meter front-ends.

Is the R5F21334CNFP#30 pin-compatible with other members of the R8C/33C Group?

Yes, all R8C/33C Group MCUs in the PLQP0032GB-A (32-pin LQFP) package - including R5F21331CNFP, R5F21332CNFP, R5F21334CNFP#30, R5F21335CNFP, and R5F21336CNFP - share identical pinouts and electrical characteristics. Firmware and PCB designs can scale across memory variants without layout changes, provided peripheral usage aligns with the selected part's SFR mapping and resource allocation.

What debugging and programming interfaces are supported by the R5F21334CNFP#30?

The R5F21334CNFP#30 supports on-chip debug via a dedicated 6-pin interface (including RESET, CLK, and data lines), enabling full breakpoint, register inspection, and flash programming without external emulators. Its debug architecture supports real-time trace and flash rewrite during development, and the R5F21334CNFP#30's ROM code protect and ID code check features safeguard intellectual property in production units.