Renesas HD6473378FJ10

Overview

HD6473378FJ10 from Hitachi is a 16-bit single-chip microcontroller in the H8/337 series, featuring an H8/300 CPU core, 32 KB on-chip masked ROM, 1 KB RAM, integrated 16-bit free-running timer, dual 8-bit timers, PWM timers, UART-compatible serial interface, 8-channel 10-bit A/D converter, and dual 8-bit D/A converters. It operates at up to 10 MHz and targets embedded motor control and industrial I/O systems.

For engineers reviewing the HD6473378FJ10 datasheet, HD6473378FJ10 pinout, HD6473378FJ10 application, or HD6473378FJ10 equivalent, key selection criteria include ROM size (32 KB), RAM capacity (1 KB), A/D resolution (10-bit, 8-channel), D/A count (2×8-bit), and 10 MHz max clock frequency in single-chip mode.

Technical Context

The HD6473378FJ10 implements the H8/300 CPU architecture with 16-bit data bus and 24-bit address space, supporting three operating modes (expanded Mode 1/2 and single-chip Mode 3) controlled via SYSCR and MDCR registers. Its memory map includes dedicated register fields at fixed addresses (e.g., FRC at H'FF92, ADCSR at H'FFE8).

On-chip peripherals are memory-mapped: the 16-bit free-running timer uses FRC, OCRA/OCRB, and TCSR registers; the A/D converter supports single-scan and continuous scan modes with external trigger input; dual D/A channels (DADR0/DADR1 at H'FFA8/H'FFA9) operate independently with programmable output enable.

Key Specifications

Pinout & Package

HD6473378FJ10 is housed in a 100-pin plastic QFP (FJ package), with 72 general-purpose I/O pins distributed across Ports 1–9, plus dedicated function pins for reset, clock input (XIN/XOUT), serial interface (TXD/RXD), A/D inputs (AN0–AN7), D/A outputs (DA0/DA1), and timer I/O (TO0–TO3, TI0–TI3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD6473378FJ10, the HD64F3378FJ10 offers field-programmable flexibility at the cost of higher standby current and write-cycle endurance limits, while the HD6413378FJ10 trades integrated ROM for expandable code space - requiring additional address/data bus routing and memory access timing design.

Availability

HD6473378FJ10 is available at Aetrix Electronics and suitable for industrial motor control, PLC I/O modules, and embedded HVAC systems requiring stable component supply and long-term production continuity.

Supply support for HD6473378FJ10 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

Hitachi Ltd. (now part of Renesas Electronics Corporation) was a Japanese multinational conglomerate specializing in industrial systems, semiconductors, and infrastructure solutions.

The H8/337 series was designed for cost-sensitive, high-reliability embedded control applications where integration of ROM, RAM, analog peripherals, and timers into a single chip reduced system complexity and improved thermal performance.

FAQ

What is the maximum operating frequency of the HD6473378FJ10?

The HD6473378FJ10 supports a maximum system clock frequency of 10 MHz in single-chip mode. This frequency is derived from an external crystal or ceramic resonator connected to the XIN/XOUT pins and governs instruction execution speed, timer resolution, and A/D conversion timing. Operation above 10 MHz is not supported and may cause undefined behavior or timing violations in on-chip peripherals.

Does the HD6473378FJ10 include on-chip debug capability?

The HD6473378FJ10 does not integrate on-chip debug circuitry such as JTAG or background debugger interfaces. Debugging requires external in-circuit emulators (ICE) connected via the dedicated ICE interface pins (not shared with user I/O), as specified in the H8/338 Series Hardware Manual Section 1.3.2. The HD6473378FJ10 relies on external tools for breakpoint setting, register inspection, and memory read/write during development.

How many analog input channels does the HD6473378FJ10 support?

The HD6473378FJ10 supports exactly eight analog input channels (AN0 through AN7), each mapped to dedicated pins and configurable via the A/D Control Register (ADCR). These channels feed a shared 10-bit successive-approximation A/D converter with programmable sampling time and scan mode operation - enabling sequential or single-channel conversion without external multiplexing.

Can the HD6473378FJ10 generate PWM signals with variable duty cycle?

Yes, the HD6473378FJ10 includes two dedicated PWM timers (PWM0 and PWM1), each with independent 8-bit duty registers (DTR) and timer counters (TCNT). Duty cycle is controlled by writing values to DTR registers (H'FFA1/H'FFA5), allowing 256-step resolution. PWM output is available on TO0 and TO1 pins, with frequency determined by TCNT reload value and system clock division settings.

Is the HD6473378FJ10 pin-compatible with other H8/337 series variants?

Yes, the HD6473378FJ10 shares identical pinout and package (100-pin QFP) with other H8/337 family members including HD6433378FJ10 and HD6413378FJ10. All variants maintain consistent signal assignments for power, clock, reset, I/O ports, A/D inputs, D/A outputs, and timer I/O - enabling hardware reuse across ROM, ZTAT, and ROMless versions during platform development.