Renesas R5F21355CDFP#V2

Overview

R5F21355CDFP#V2 from Renesas Electronics is a 16-bit R8C CPU core MCU with 24 KB flash program ROM, 2 KB data flash (4 × 1 KB blocks), and 2 KB RAM, operating at up to 20 MHz (VCC = 2.7–5.5 V) with 50 ns minimum instruction execution time; it integrates UART0/1/2, I²C, LIN, 12-channel 10-bit ADC, dual 8-bit DAC, and six timer modules (RA–RE + RD dual 16-bit), targeting embedded control in consumer audio and office equipment.

For engineers reviewing the R5F21355CDFP#V2 datasheet, R5F21355CDFP#V2 pinout, R5F21355CDFP#V2 application, or R5F21355CDFP#V2 equivalent, key selection criteria include its -40°C to +85°C industrial temperature grade, 52-pin LQFP package with 47 CMOS I/O ports, background operation (BGO) for data flash, and hardware LIN module using Timer RA and UART0.

Technical Context

The R5F21355CDFP#V2 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte (00000h–FFFFFh), with program ROM starting at 0A000h and data flash at 03000h–03FFFh.

It supports four clock sources: XIN (up to 20 MHz), XCIN (32 kHz), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator. Power management includes wait mode (3.5 µA @ 3.0 V, f(XCIN)=32 kHz) and stop mode (2.0 µA @ 3.0 V), with voltage detection circuits for power-on reset and configurable level monitoring.

Key Specifications

Pinout & Package

52-pin LQFP package (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pin pitch, with exposed thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21355CNFP, the R5F21355CDFP#V2 offers extended temperature range for harsh environments; compared with R5F21356CDFP, it trades ROM/RAM capacity for lower cost and footprint in resource-constrained designs.

Availability

R5F21355CDFP#V2 is available at Aetrix Electronics and suitable for audio equipment control, office equipment motor control, consumer appliance UI, and industrial sensor hub applications requiring stable component supply across extended temperature ranges.

Supply support for R5F21355CDFP#V2 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The R8C/35C Group, including R5F21355CDFP#V2, was designed for cost-sensitive, low-power embedded control in consumer electronics-emphasizing integration of timers, communication interfaces, and mixed-signal peripherals in compact LQFP packages.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F21355CDFP#V2?

The R5F21355CDFP#V2 operates at up to 20 MHz when supplied at 2.7–5.5 V, achieving a minimum instruction execution time of 50 ns. At reduced voltage (1.8–5.5 V), it supports 5 MHz operation with 200 ns minimum instruction time. Its industrial-grade D version guarantees full functionality across -40°C to +85°C ambient temperatures, making R5F21355CDFP#V2 suitable for demanding environmental conditions.

Does the R5F21355CDFP#V2 support in-system programming and debug interfaces?

Yes, the R5F21355CDFP#V2 includes on-chip debug capability and supports in-system flash rewriting via dedicated debug pins. It features ROM code protection and ID code checking for secure firmware deployment. The device uses the standard Renesas E8/E8a debug interface, allowing full breakpoint, step-through, and memory inspection during development-no external programmer is required for basic debugging of R5F21355CDFP#V2 applications.

How does the data flash architecture of the R5F21355CDFP#V2 support firmware updates?

The R5F21355CDFP#V2 contains 4 × 1 KB data flash blocks (total 4 KB) with background operation (BGO) support, enabling concurrent CPU execution and flash erase/write. This allows safe over-the-air or field firmware updates without halting real-time tasks. Each block endures 10,000 write/erase cycles, and BGO eliminates interrupt latency spikes during flash operations-critical for maintaining deterministic timing in R5F21355CDFP#V2-based control systems.

Can the R5F21355CDFP#V2 generate three-phase PWM waveforms for motor control?

Yes, the R5F21355CDFP#V2's Timer RD module supports reset synchronous PWM and complementary PWM modes, directly generating three-phase waveforms on six output pins (TRDIOA0–TRDIOC1). These modes provide synchronized dead-time insertion, sawtooth/triangular wave modulation, and automatic phase shifting-enabling direct drive of three-phase BLDC or stepper motor gate drivers without external logic, a key capability of the R5F21355CDFP#V2 in motion control applications.

What communication interfaces are integrated into the R5F21355CDFP#V2?

The R5F21355CDFP#V2 integrates UART0, UART1, and UART2 (with I²C-bus and multiprocessor modes), one I²C bus (shared with SSU), one synchronous serial unit (SSU), and a dedicated hardware LIN module. UART2 supports full-duplex I²C communication and multiprocessor addressing, while the LIN module uses Timer RA and UART0 to implement LIN 2.0/2.1 protocol-providing robust, low-cost networking for R5F21355CDFP#V2 in distributed sensor and actuator systems.