Renesas R5F21334ANFP#U1

Overview

R5F21334ANFP 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 integrates UART0/1/2, I²C, SSU, LIN hardware module, 10-bit A/D converter (12 channels), dual 8-bit D/A converters, and multiple timers (RA/RB/RC/RE) for embedded control in consumer appliances and office equipment.

For engineers reviewing the R5F21334ANFP datasheet, R5F21334ANFP pinout, R5F21334ANFP application, or R5F21334ANFP equivalent, key selection criteria include its 32-pin LQFP package, -20°C to +85°C operating range (N version), 20 MHz max clock at 2.7–5.5 V supply, low-power wait/stop modes (3.5 µA / 2.0 µA), and integrated LIN physical layer support via UART0 + Timer RA.

Technical Context

The R5F21334ANFP implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte, with program ROM starting at 0x08000, data flash at 0x03000–0x03FFF, and RAM at 0x00400–0x009FF.

Peripheral integration includes three UART channels (UART0/1/2), one shared I²C/SSU interface, hardware LIN transceiver using UART0 and Timer RA, 12-channel 10-bit A/D with sample-and-hold and sweep mode, and four independent timer modules (RA: 8-bit period/PWM; RB: 8-bit PWM/one-shot; RC: 16-bit capture/compare/PWM2; RE: 8-bit real-time clock).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21332ANFP and R5F21335ANFP, the R5F21334ANFP delivers optimal balance of memory (16 KB ROM/1.5 KB RAM), low-power performance (2.0 µA stop mode), and integrated LIN-making it ideal for mid-tier consumer and industrial control where cost, code size, and automotive connectivity coexist.

Availability

R5F21334ANFP is available at Aetrix Electronics and suitable for home appliance control, office equipment motor management, and audio equipment power supervision requiring stable component supply across long production lifecycles.

Supply support for R5F21334ANFP 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 industrial, automotive, and consumer markets.

The R8C/33A Group, including R5F21334ANFP, was designed for cost-sensitive, low-power embedded control in electronic household appliances, office equipment, and audio systems-emphasizing integration, EMI/EMS robustness, and seamless firmware update capability via BGO.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F21334ANFP?

The R5F21334ANFP operates at up to 20 MHz when supplied between 2.7 V and 5.5 V. At lower voltages down to 1.8 V, the maximum frequency is reduced to 5 MHz to maintain timing integrity. This dual-voltage/frequency specification allows designers to optimize power consumption versus processing performance based on system requirements and battery constraints. The R5F21334ANFP maintains full peripheral functionality across this entire voltage range.

Does the R5F21334ANFP support in-system programming and background flash operations?

Yes, the R5F21334ANFP supports background operation (BGO) for data flash, enabling erase and write operations to proceed concurrently with CPU program execution. Its on-chip debug interface and flash rewrite function allow full in-system programming without external programmers. The R5F21334ANFP's 4 KB data flash is organized into four 1 KB blocks, each independently erasable-facilitating wear leveling and robust firmware update mechanisms in deployed devices.

How does the hardware LIN module in the R5F21334ANFP function?

The R5F21334ANFP implements LIN 2.0/2.1 physical layer compliance using UART0 for serial framing and Timer RA for precise baud rate generation and synchronization. This dedicated hardware offloads LIN protocol timing and error detection from the CPU, ensuring ±1.5% baud accuracy and automatic handling of sync break fields and checksums. The R5F21334ANFP requires no external LIN transceiver for basic slave-node operation in automotive body electronics applications.

What are the low-power modes supported by the R5F21334ANFP and their typical current draw?

The R5F21334ANFP offers wait mode (3.5 µA at 3.0 V with 32 kHz XCIN active) and stop mode (2.0 µA at 3.0 V with all clocks halted except reset circuitry). Both modes retain RAM contents and allow wake-up via external interrupt, timer compare match, or LIN activity. These ultra-low quiescent currents make the R5F21334ANFP suitable for battery-powered remote controls, sensor nodes, and always-on subsystems where multi-year operation is required.

Can the R5F21334ANFP's A/D converter perform automatic channel scanning without CPU intervention?

Yes, the R5F21334ANFP's 10-bit A/D converter supports sweep mode, which automatically sequences through up to 12 configured analog input channels (AN0–AN11) and stores results in consecutive RAM locations. Sweep initiation can be triggered by software, timer overflow, or external signal (ADTRG pin), allowing continuous sensor monitoring with minimal CPU overhead. This capability is directly implemented in the A/D control logic of the R5F21334ANFP and requires no firmware polling loop.