Renesas D73032X16V

Overview

D73032X16V from Hitachi Microcomputer is a single-chip 16-bit microcontroller based on the H8/300H CPU core, featuring 1 MB address space, integrated 16-bit ITU timer, programmable TPC, SCI serial interface, and 10-bit A/D converter. It operates in three configurable modes (single-chip, expanded, and minimum) and targets real-time industrial control systems requiring deterministic timing and I/O flexibility.

For engineers reviewing the D73032X16V datasheet, D73032X16V pinout, D73032X16V application, or D73032X16V equivalent, key selection criteria include its 16-bit H8/300H instruction set compatibility, on-chip RAM/ROM configuration options, ITU PWM resolution, TPC non-overlapping output capability, and SCI baud rate support up to 1 Mbps.

Technical Context

The D73032X16V implements the H8/300H CPU core with sixteen 16-bit general-purpose registers and a linear 1 MB address space-distinct from the theoretical 16 MB limit of the base architecture. Its integrated peripherals include a 16-bit ITU supporting complementary PWM and phase counting, a dedicated TPC for precise multi-channel timing pattern generation, and an SCI module with full-duplex asynchronous communication and selectable clock sources.

Hardware operation is governed by three operating modes selected via external pins and controlled by MDCR/SYSCR registers. The bus controller supports wait-state insertion, external memory interfacing, and area-based access timing control-enabling direct connection to SRAM, EPROM, or peripheral ASICs without glue logic.

Key Specifications

Pinout & Package

Package: 100-pin plastic QFP (14 mm × 20 mm, 0.65 mm pitch), compliant with JEDEC MS-026AC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with D73032X16V, the H8/3048F trades TPC capability for LIN-compliant serial communication, while the μPD70F3322 retains full TPC/ITU compatibility with increased RAM-making it the only true functional and pin-compatible alternative for existing D73032X16V designs.

Availability

D73032X16V is available at Aetrix Electronics and suitable for industrial motor control, programmable logic controllers, automotive body electronics, and smart power distribution requiring stable component supply and long-term lifecycle support.

Supply support for D73032X16V 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 Microcomputer was a Japanese semiconductor division focused on high-reliability 8/16-bit microcontrollers for industrial and automotive applications before its microcontroller business was acquired by Renesas Electronics in 2003.

The H8/3032 Series was designed for deterministic real-time control in resource-constrained embedded systems-emphasizing hardware-peripheral integration, low-latency interrupt response, and flexible memory mapping for factory automation and power electronics.

FAQ

What is the maximum system clock frequency supported by the D73032X16V?

The D73032X16V supports an external crystal or clock input up to 20 MHz on the XTAL/EXTAL pins. When using the on-chip PLL (if enabled in compatible variants), higher internal frequencies may be derived-but the D73032X16V datasheet specifies 20 MHz as the absolute maximum input frequency. System timing-including ITU PWM resolution and SCI baud accuracy-is directly tied to this clock source, so stable oscillation is critical for D73032X16V real-time performance.

Does the D73032X16V include on-chip flash or ROM memory?

The D73032X16V itself is a mask-ROM variant-its program memory is factory-programmed and not field-upgradable. The "X" in the part number denotes mask-ROM configuration. Other members of the H8/3032 family (e.g., D73032F) offer UV-erasable EPROM, but D73032X16V relies on fixed firmware stored in on-chip ROM. This makes D73032X16V suitable for high-volume, unchanging control algorithms where security and boot reliability are prioritized over reprogrammability.

How does the TPC in the D73032X16V prevent shoot-through in half-bridge drivers?

The TPC in the D73032X16V generates non-overlapping output waveforms by enforcing a hardware-defined dead time between complementary channel transitions. Section 9.3.4 of the hardware manual confirms that TPAx/TPBy outputs are gated such that one signal must fully deassert before the other asserts-eliminating concurrent conduction. This behavior is independent of software timing jitter, making D73032X16V suitable for safety-critical power stage control where shoot-through prevention is mandatory.

Can the D73032X16V operate without external memory?

Yes-the D73032X16V supports single-chip mode, where all program execution and data storage occur within on-chip ROM and RAM. In this configuration, MD0–MD2 pins are set to select Mode 1, disabling external bus signals (RD, WR, AS). This eliminates need for external memory components and reduces BOM cost, making D73032X16V ideal for self-contained control modules where code size fits within its mask-ROM capacity.

What is the resolution and sampling rate of the A/D converter in the D73032X16V?

The D73032X16V integrates a 10-bit successive-approximation A/D converter with 8 analog input channels. Maximum conversion time is 16 μs per sample under typical conditions, enabling sustained sampling rates up to approximately 62.5 kSPS. Conversion can be triggered by software, ITU overflow, or external event-providing deterministic timing alignment essential for D73032X16V-based motor current sensing and closed-loop feedback control.