Renesas DS61651CN50FPV

Overview

DS61651CN50FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1651 Group, featuring a 50 MHz maximum CPU clock, 512 KB on-chip Flash memory, and integrated peripherals including TPU (16-bit timer pulse unit), SCI (serial communication interface), and WDT (watchdog timer). It targets industrial control systems requiring deterministic real-time response, such as motor drive controllers and programmable logic relays.

For engineers reviewing the DS61651CN50FPV datasheet, DS61651CN50FPV pinout, DS61651CN50FPV application, or DS61651CN50FPV equivalent, this page provides verified technical context, package mapping, functional specifications, and validated alternative options for embedded control design and long-life industrial BOM planning.

Technical Context

The DS61651CN50FPV implements the H8SX CPU core with advanced mode support, enabling 32-bit addressing and extended instruction set execution. It integrates a programmable pulse generator (PPG), data transfer controller (DTC), and interrupt controller (INTC) to offload timing-critical tasks from the main CPU.

Its clock system includes a PLL-based clock pulse generator (CPG) supporting multiple clock sources - internal oscillator, external crystal (1–20 MHz), or external clock input - with configurable prescalers and output dividers for peripheral clock domain partitioning.

Key Specifications

Pinout & Package

DS61651CN50FPV is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow Renesas' standardized H8SX/1651 Group layout, supporting drop-in compatibility across same-family variants with identical pin count.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F565NEHDFB and H8SX/1622FXXX, DS61651CN50FPV delivers optimal balance of real-time determinism, integrated peripherals, and industrial temperature support in a mature 100-pin LQFP package - ideal for sustaining legacy designs while meeting modern reliability and code-size requirements.

Availability

DS61651CN50FPV is available at Aetrix Electronics and suitable for industrial motor control, programmable logic relays, building energy management systems, and ruggedized data loggers requiring stable component supply across extended product lifecycles.

Supply support for DS61651CN50FPV 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 H8SX/1651 Group was designed specifically for deterministic real-time industrial control applications - emphasizing low-latency interrupt response, integrated timing peripherals, and long-term supply assurance for factory automation and infrastructure equipment.

FAQ

What is the maximum operating frequency of the DS61651CN50FPV?

The DS61651CN50FPV operates at a maximum CPU clock frequency of 50 MHz. This rating is guaranteed across the full industrial temperature range (−40°C to +85°C) and supply voltage range (3.0 V to 3.6 V), enabling consistent real-time performance in demanding embedded control environments. The DS61651CN50FPV achieves this via its on-chip PLL-based clock pulse generator with configurable input dividers and output multipliers.

Does the DS61651CN50FPV support in-system programming of its Flash memory?

Yes, the DS61651CN50FPV supports in-application programming (IAP) of its 512 KB on-chip Flash memory. Firmware updates can be performed without external programmers by executing dedicated Flash write/erase routines from RAM, with block-level erase (1 KB) and word-level programming. The DS61651CN50FPV includes hardware lock bits to prevent accidental overwrite or unauthorized read-out during field deployment.

What debug interface does the DS61651CN50FPV use, and is JTAG supported?

The DS61651CN50FPV uses Renesas' proprietary on-chip debug interface compliant with the E1 and E20 emulators - not IEEE 1149.1 JTAG. It supports real-time trace, hardware breakpoints, and register inspection without halting CPU execution. Debug access is provided through dedicated pins (TCK, TDI, TDO, TMS, and TRST) mapped to Port 10, and requires Renesas-provided debug tools and firmware drivers. The DS61651CN50FPV does not implement standard JTAG TAP controller logic.

Can the DS61651CN50FPV generate complementary PWM signals with programmable dead time?

Yes, the DS61651CN50FPV's TPU (Timer Pulse Unit) supports complementary PWM output with hardware-inserted dead time on up to four independent channels. Dead-time values are programmable in 12.5 ns increments (at 50 MHz clock), and polarity inversion is configurable per channel. This capability allows the DS61651CN50FPV to directly drive gate drivers in 3-phase inverter topologies without external dead-time logic.

Is the DS61651CN50FPV qualified for automotive applications?

No, the DS61651CN50FPV is classified as a Standard-grade Renesas product intended for industrial applications such as factory automation, building systems, and test equipment. It is not AEC-Q100 qualified, lacks automotive-specific qualification testing (e.g., extended temperature range beyond +85°C, enhanced ESD immunity), and is not recommended for safety-critical vehicle subsystems. For automotive use, Renesas offers the RH850 or RL78 families instead of the DS61651CN50FPV.