Renesas R5F21357CDFP#V0

Overview

R5F21357CDFP#V0 from Renesas Electronics is a 16-bit R8C CPU core microcontroller with 48 KB flash program ROM, 4 KB data flash (BGO-capable), and 4 KB RAM, operating at up to 20 MHz (2.7–5.5 V) or 5 MHz (1.8–5.5 V); it integrates UART0/1/2, I²C, SSU, LIN hardware module, 10-bit ×12-channel ADC, dual 8-bit DACs, and six timer units (RA–RE + RD dual 16-bit) for motor control and real-time embedded systems in consumer appliances.

For engineers reviewing the R5F21357CDFP#V0 datasheet, R5F21357CDFP#V0 pinout, R5F21357CDFP#V0 application, or R5F21357CDFP#V0 equivalent, key selection criteria include its −40°C to +85°C industrial temperature grade, 52-pin LQFP package with 47 CMOS I/Os (including high-current drive), background operation data flash, and integrated LIN transceiver support via Timer RA and UART0.

Technical Context

The R5F21357CDFP#V0 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability, executing instructions in as little as 50 ns at 20 MHz. Its memory map spans 1 Mbyte, with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash blocks (1 KB × 4) mapped at 03000h–03FFFh.

It supports four clock sources - XIN (up to 20 MHz crystal/resonator), XCIN (32 kHz crystal), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator - with oscillation stop detection, selectable frequency dividers (1/2/4/8/16), and three low-power modes (wait, stop, standard). The DTC provides single-channel DMA with 33 activation sources.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm body, 0.65 mm pitch, surface-mount.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit MCU applications.

Compared with R5F21357CNFP, the R5F21357CDFP#V0 adds −40°C operational capability without sacrificing performance or features; versus R5F21358CDFP, it offers optimal balance of code space and cost for mid-complexity embedded control where 48 KB suffices.

Availability

R5F21357CDFP#V0 is available at Aetrix Electronics and suitable for home appliance control, office equipment motor drive, consumer audio signal processing, and industrial sensor interface hub applications requiring stable component supply across long production lifecycles.

Supply support for R5F21357CDFP#V0 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 R5F21357CDFP#V0, was designed for cost-sensitive, real-time embedded control in consumer and industrial equipment-emphasizing EMI/EMS robustness, low-power operation, and integrated analog/motor peripherals.

FAQ

What is the maximum operating frequency and voltage range for the R5F21357CDFP#V0?

The R5F21357CDFP#V0 operates at up to 20 MHz when supplied with 2.7–5.5 V, and at up to 5 MHz when supplied with 1.8–5.5 V. These dual-frequency modes allow flexible trade-offs between performance and ultra-low-voltage operation in battery-powered devices. The R5F21357CDFP#V0 maintains full peripheral functionality across both ranges, including ADC accuracy and timer resolution.

Does the R5F21357CDFP#V0 support background operation for data flash writes?

Yes, the R5F21357CDFP#V0 supports Background Operation (BGO) for its 4 KB data flash (1 KB × 4 blocks), enabling firmware or parameter updates while the CPU continues executing application code. This feature is critical for fail-safe logging and over-the-air configuration changes in systems where uninterrupted operation is required. The R5F21357CDFP#V0 implements dedicated flash control registers and interrupt flags to manage BGO safely.

What peripheral interfaces are integrated into the R5F21357CDFP#V0?

The R5F21357CDFP#V0 integrates UART0, UART1, and UART2 (with I²C-bus and multiprocessor modes), synchronous serial I/O (SSU), hardware LIN module (using Timer RA and UART0), 10-bit ×12-channel ADC with sample-and-hold, dual 8-bit DACs, two comparator B circuits, and six timer units (RA–RE + dual RD). These peripherals eliminate the need for external interface ICs in typical appliance and motor-control designs.

What is the industrial temperature rating of the R5F21357CDFP#V0?

The R5F21357CDFP#V0 is rated for −40°C to +85°C ambient operation (D version), making it suitable for deployment in harsh industrial and outdoor environments where commercial-grade MCUs would fail. This extended temperature range is validated across all specified electrical parameters-including ADC linearity, DAC output stability, and flash endurance-ensuring consistent behavior under thermal stress. The R5F21357CDFP#V0 maintains this rating in its 52-pin LQFP package.

How many I/O pins does the R5F21357CDFP#V0 provide, and what are their capabilities?

The R5F21357CDFP#V0 provides 47 programmable CMOS I/O ports (plus one input-only pin), each configurable as input or output via direction registers, with software-selectable pull-up resistors. All 47 I/Os support high-current drive capability for direct LED or small relay control. Multiple pins offer alternate functions-including analog inputs (AN0–AN11), DAC outputs (DA0/DA1), UART/I²C/SSU signals, and timer capture/compare channels-enabling dense peripheral integration without external glue logic.