Renesas R5F61655N50FPV

Overview

R5F61655N50FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1655 Group, designed for embedded control applications requiring integrated peripherals, deterministic real-time response, and industrial-grade reliability. It features a 50 MHz CPU clock, 512 KB on-chip Flash memory, 32 KB RAM, and supports CAN 2.0B, multiple UARTs, TPU timers, and 10-bit ADC with 24 channels - deployed in motor control systems, factory automation I/O modules, and HVAC controllers.

For engineers reviewing the R5F61655N50FPV datasheet, R5F61655N50FPV pinout, R5F61655N50FPV application, or R5F61655N50FPV equivalent, key selection criteria include its 144-pin LQFP package, 3.3 V single-supply operation, -40°C to +85°C industrial temperature range, and support for boot-mode configuration via dedicated pins - critical for secure firmware initialization and field-upgradable control units.

Technical Context

The R5F61655N50FPV implements the H8SX V2 core with advanced addressing modes, 32-bit register architecture, and three operating modes (Normal, Middle, Advanced) enabling scalable performance and code efficiency. It integrates a Clock Pulse Generator (CPG) supporting PLL-based frequency synthesis, a Bus State Controller (BSC) for external memory interface timing, and a Data Transfer Controller (DTC) for autonomous peripheral-to-memory transfers without CPU intervention.

Peripheral integration includes a 16-bit Timer Pulse Unit (TPU) with PWM output and input capture, a Watchdog Timer (WDT) with windowed enable, and an Interrupt Controller (INTC) supporting 128 vectored interrupt sources with priority levels and nesting. All peripherals are memory-mapped into the unified 32-bit address space and accessible via standard load/store instructions.

Key Specifications

Pinout & Package

R5F61655N50FPV is housed in a 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch) package with exposed thermal pad, rated for surface-mount reflow assembly and industrial thermal cycling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit industrial microcontroller applications.

Compared with R5F61655N50FPV, the R5F61655NFPV trades clock speed and Flash size for lower unit cost in less demanding applications, while the R5F61658N50FPV adds USB 2.0 capability without altering pinout or core timing - offering upgrade path for future connectivity needs without redesign.

Availability

R5F61655N50FPV is available at Aetrix Electronics and suitable for industrial PLC modules, motor drive control units, building automation gateways, and factory floor HMI controllers requiring stable component supply across extended product lifecycles.

Supply support for R5F61655N50FPV 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 infrastructure markets.

The R5F61655N50FPV belongs to the H8SX/1655 Group - a family of 32-bit CISC MCUs engineered for deterministic real-time control in harsh industrial environments, emphasizing peripheral integration, Flash reliability, and long-term supply assurance.

FAQ

What is the maximum operating frequency of the R5F61655N50FPV?

The R5F61655N50FPV operates at a maximum CPU clock frequency of 50 MHz, achieved via its integrated Clock Pulse Generator (CPG) with PLL multiplier using an external crystal or clock source. This frequency is fully supported across the specified industrial temperature range (-40°C to +85°C) and 3.3 V supply voltage, enabling tight real-time control loops in motor and power conversion applications. The R5F61655N50FPV datasheet confirms this rating under DC and AC characteristics sections.

Does the R5F61655N50FPV support in-system programming (ISP)?

Yes, the R5F61655N50FPV supports in-system programming via its on-chip Flash memory, which is organized into 1 KB erasable sectors and allows byte-wise programming. Programming is performed through the built-in bootloader accessed via SCI or CAN interfaces, enabling field firmware updates without removing the device. The R5F61655N50FPV Hardware Manual details the command protocol and timing requirements for safe ISP operation.

What package type and pin count does the R5F61655N50FPV use?

The R5F61655N50FPV uses a 144-pin LQFP package (20 mm × 20 mm, 0.5 mm pitch) with an exposed thermal pad. This package is RoHS-compliant and qualified for industrial reflow soldering profiles. Pin assignments-including power, reset, clock, I/O, and peripheral signals-are fully documented in Section 1.4 of the R5F61655N50FPV Hardware Manual, Rev. 2.00.

Is the R5F61655N50FPV qualified for automotive applications?

No, the R5F61655N50FPV is classified as a "Standard" quality grade device per Renesas documentation and is intended for industrial applications such as PLCs, motor drives, and building automation-not automotive or safety-critical systems. It lacks AEC-Q100 qualification and is not recommended for use in vehicles without additional validation and formal approval from Renesas Electronics. The R5F61655N50FPV datasheet explicitly restricts its use to non-automotive contexts.

What development tools are officially supported for the R5F61655N50FPV?

Renesas provides official support for the R5F61655N50FPV through the High-performance Embedded Workshop (HEW) IDE, the E8a and E10A-USB debug emulators, and the H8SX/1655 Group-specific device drivers and peripheral libraries. These tools enable full C/C++ development, real-time debugging, Flash programming, and hardware abstraction layer (HAL) integration. Documentation and tool downloads are available on the Renesas website under the R5F61655N50FPV product page.