Renesas HD6473657WV

Overview

HD6473657WV from Renesas Technology Corp. is a 16-bit single-chip microcontroller in the H8/3657 Series, featuring an H8/300L CPU core, on-chip 14-bit PWM, five timers (including watchdog), two-channel serial interface (SCI), and 8-channel 10-bit A/D converter. It operates at up to 20 MHz and targets real-time motor control and industrial automation systems requiring integrated timing, analog sensing, and serial communication.

For engineers reviewing the HD6473657WV datasheet, HD6473657WV pinout, HD6473657WV application, or HD6473657WV equivalent, key selection considerations include its 100-pin QFP package, 64 KB on-chip ROM, 4 KB RAM, support for multiple power-down modes (Sleep, Standby, Watch, Subsleep), and peripheral integration enabling compact embedded control without external timing or interface ICs.

Technical Context

The HD6473657WV implements the H8/300L CPU architecture with full instruction set compatibility to the H8/300, supporting 16-bit data paths, 24-bit addressing (16 MB space), and register-based operand addressing. Its memory map includes dedicated areas for ROM, RAM, peripheral registers, and interrupt vectors.

Hardware peripherals are memory-mapped and synchronized to the system clock: the 14-bit PWM module supports center-aligned and edge-aligned output with dead-time insertion; Timer V provides input capture, output compare, and pulse-width modulation with independent prescalers; SCI1 and SCI2 each support asynchronous full-duplex communication with programmable baud rates and framing options.

Key Specifications

Pinout & Package

HD6473657WV is housed in a 100-pin plastic quad flat package (QFP) with 0.5 mm lead pitch, compliant with JEDEC MS-026. The package supports surface-mount reflow assembly and provides dedicated power/ground pins for analog and digital domains to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD6473657WV, HD64F3657FV offers field-programmable flash instead of PROM, simplifying development iteration but reducing tamper resistance; R5F3657EDFP delivers significantly higher performance and modern peripherals but mandates complete hardware and software re-engineering - making HD6473657WV optimal for stable, cost-sensitive, long-lifecycle industrial control deployments.

Availability

HD6473657WV is available at Aetrix Electronics and suitable for motor control systems, industrial PLC I/O modules, smart power metering, and embedded HVAC controllers requiring stable component supply across extended production lifecycles.

Supply support for HD6473657WV 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 Technology Corp. was formed in 2003 through the merger of Hitachi and Mitsubishi Electric's semiconductor businesses, specializing in microcontrollers, analog, and power devices for industrial and automotive markets.

The H8/3657 Series was designed specifically for cost-effective, high-reliability embedded control in factory automation, motor drives, and building management systems - emphasizing integrated peripherals, low-power operation, and long-term supply stability.

FAQ

What is the maximum operating frequency of the HD6473657WV?

The HD6473657WV supports a maximum system clock frequency of 20 MHz, achieved using an external crystal (1–20 MHz) connected to XTAL/EXTAL pins or an external clock source. At this frequency, the H8/300L CPU executes instructions with a minimum cycle time of 50 ns, enabling deterministic real-time response for motor control loops and interrupt-driven I/O handling. The HD6473657WV datasheet specifies timing margins for all peripheral modules under this condition.

Does the HD6473657WV include on-chip flash memory or ROM?

The HD6473657WV contains 64 KB of on-chip PROM (programmable read-only memory), not flash memory. This PROM is programmed once during manufacturing or final test and retains code permanently without power. Unlike flash-based variants such as HD64F3657FV, the HD6473657WV does not support in-system reprogramming, making it suitable for applications where firmware integrity and immutability are critical, such as certified industrial safety functions.

How many analog-to-digital converter channels does the HD6473657WV support?

The HD6473657WV integrates an 8-channel, 10-bit successive-approximation A/D converter. All eight channels (AD0–AD7) are multiplexed onto Port 5 pins and share a common sample-and-hold circuit. Conversion time is fixed at 10.4 µs per channel, and the ADC can be triggered automatically by PWM period end, timer overflow, or software command - ensuring precise synchronization with control timing events in the HD6473657WV.

What power-saving modes are available on the HD6473657WV?

The HD6473657WV implements five distinct low-power modes: Sleep, Standby, Watch, Subsleep, and Subactive. In Standby mode, current consumption drops to 1.2 µA while preserving RAM and register contents; Watch mode uses the subclock (32.768 kHz) to maintain RTC and wake on external interrupt with 10 µs latency. These modes are controlled via system control registers and require no external components - a key design advantage of the HD6473657WV for battery-backed industrial nodes.

Is the HD6473657WV pin-compatible with other H8/3657 series microcontrollers?

Yes, the HD6473657WV shares identical pinout and package (100-pin QFP) with other members of the H8/3657 family, including HD6433657 and HD64F3657FV. Pin functions, power/ground assignments, and peripheral I/O mappings are consistent across these variants, allowing direct substitution in existing PCB layouts when migrating between PROM, OTP, or flash versions - provided firmware and memory configuration are updated accordingly for the HD6473657WV.