Renesas R5F21387CDFP#V0

Overview

R5F21387CDFP#V0 from Renesas Electronics is a 16-bit R8C CPU core microcontroller with 48 KB flash program memory, 4 KB data flash (BGO-capable), and 4 KB RAM, operating at up to 20 MHz (50 ns min instruction time) across 1.8–5.5 V supply. It integrates dual 10-bit A/D converters (20 channels), dual 8-bit D/A outputs, LIN hardware module, and six independent timer units-including 16-bit Timer RD with complementary PWM for three-phase motor control-targeting appliance motor drive and real-time sensor processing.

For engineers reviewing the R5F21387CDFP#V0 datasheet, R5F21387CDFP#V0 pinout, R5F21387CDFP#V0 application, or R5F21387CDFP#V0 equivalent, key selection criteria include its −40°C to +85°C industrial temperature grade, 80-pin LQFP package with 75 CMOS I/Os (including 20 analog inputs), background data flash rewrite capability, and integrated LIN physical layer support via UART0 and Timer RA.

Technical Context

The R5F21387CDFP#V0 implements the R8C CPU core with 89 fundamental instructions, 1 Mbyte address space, and dedicated 16×16→32-bit multiplier with MAC support. Its clock system includes four independent sources: external XIN (up to 20 MHz), 32 kHz XCIN crystal input, high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator-each selectable via programmable frequency dividers (1/2/4/8/16).

Peripheral integration centers on deterministic real-time control: Timer RD provides reset-synchronous and complementary PWM modes for 3-phase inverter gate driving; UART2 supports full I²C bus mode (SCL2/SDA2); and the Data Transfer Controller (DTC) enables autonomous transfers triggered by 39 sources-including A/D conversion completion and timer overflows-reducing CPU load during sensor acquisition and waveform generation.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PLQP0080KB-A), 12 mm × 12 mm, 0.5 mm pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21387CDFP#V0, R5F21388CDFP offers higher memory headroom for complex control algorithms, while R5F21386CDFP reduces BOM cost where flash utilization stays below 70%; all three share identical pinout, peripheral register map, and qualification profile.

Availability

R5F21387CDFP#V0 is available at Aetrix Electronics and suitable for industrial motor control, HVAC sensor nodes, audio power management, and office equipment position feedback requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F21387CDFP#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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The R8C/38C Group, including R5F21387CDFP#V0, was designed for cost-effective, real-time embedded control in consumer and industrial appliances-emphasizing EMI/EMS robustness, integrated analog peripherals, and low-power operation without sacrificing computational throughput.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F21387CDFP#V0?

R5F21387CDFP#V0 operates at up to 20 MHz when supplied with 2.7–5.5 V, achieving a minimum instruction execution time of 50 ns. At lower frequencies (e.g., 5 MHz), it supports down to 1.8 V, enabling compatibility with battery-powered or energy-harvesting systems where supply headroom is constrained.

Does R5F21387CDFP#V0 support in-system programming of its data flash memory?

Yes, R5F21387CDFP#V0 supports background operation (BGO) for data flash, allowing erase and write operations to proceed concurrently with CPU program execution. This enables seamless firmware updates, parameter storage, or calibration data logging without interrupting real-time control tasks such as motor PWM or sensor sampling.

How many analog input channels does R5F21387CDFP#V0 provide, and what is their resolution?

R5F21387CDFP#V0 integrates a 10-bit successive-approximation A/D converter with 20 input channels (AN0–AN19). Each channel supports sample-and-hold functionality and sweep mode for automatic sequential conversion, delivering consistent 10-bit precision across the full 1.8–5.5 V supply range.

What peripheral resources enable R5F21387CDFP#V0 to implement a LIN bus node without external transceivers?

R5F21387CDFP#V0 implements a hardware LIN module using UART0 for protocol handling and Timer RA for baud rate generation and synchronization. This integrated approach meets ISO 9141-2 physical layer requirements, eliminating the need for external LIN transceivers in body electronics and appliance subsystems.

Is R5F21387CDFP#V0 pin-compatible with other members of the R8C/38C Group?

Yes, all R8C/38C Group devices-including R5F21386CDFP, R5F21387CDFP#V0, and R5F21388CDFP-share the identical 80-pin LQFP (PLQP0080KB-A) package and fully compatible pin mapping. Firmware and PCB designs are interchangeable across memory variants, simplifying platform scaling and inventory management.