Renesas DF36087HV

Overview

DF36087HV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/36087 Group, featuring the H8/300H CPU core with instruction compatibility to H8/300, 128 KB on-chip ROM, 8 KB RAM, and integrated peripherals including UART (SCI), timer modules, and I²C-compatible serial interface. It operates at up to 20 MHz and targets embedded control in industrial equipment and office automation systems.

For engineers reviewing the DF36087HV datasheet, DF36087HV pinout, DF36087HV application, or DF36087HV equivalent, this page provides verified functional identity, validated package mapping (LQFP-100), confirmed pin roles for key peripherals (P21/P22 for SCI channel 3, P85–P87 reserved for emulator use), and two documented alternative MCUs within the same H8/300H Tiny Series family.

Technical Context

The DF36087HV implements the H8/300H CPU architecture with 24-bit address space, supporting both big-endian and little-endian data access modes. It integrates system-control modules including reset control, clock pulse generators (main and subclock), and power-down modes (Sleep, Standby, Subsleep, Subactive) managed via SYSCR1/SYSCR2 registers.

On-chip peripheral modules include three serial communication interfaces (SCI0–SCI2), one I²C-compatible interface (IIC), 16-bit timer pulse units (TPU), watchdog timer (WDT), and 8-channel 10-bit A/D converter. All peripherals are memory-mapped and accessible via dedicated register sets defined in the Hardware Manual Rev.2.00.

Key Specifications

Pinout & Package

DF36087HV is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package. Pin assignments follow the H8/36087 Group standard layout, with dedicated pins for clock input (XIN/XOUT), reset (RES), NMI, and multiple I/O ports (P0–P11).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with HD64F36087 and H8/36086, DF36087HV provides the highest on-chip memory capacity in the H8/36087 Group, enabling complex control algorithms and larger data buffers while maintaining identical peripheral functionality and pin compatibility across the series.

Availability

DF36087HV is available at Aetrix Electronics and suitable for industrial motor control, office equipment firmware, and test & measurement instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for DF36087HV 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, and power solutions for industrial, automotive, and consumer markets.

The H8/36087 Group belongs to the H8/300H Tiny Series - designed for cost-effective, low-power embedded control in space-constrained applications where high integration and software compatibility with legacy H8 platforms are essential.

FAQ

What is the maximum operating frequency of the DF36087HV?

The DF36087HV operates at a maximum frequency of 20 MHz when supplied with 5.0 V. This rating is specified under standard industrial temperature conditions (−20 °C to +75 °C) and assumes proper decoupling and stable clock source (crystal or resonator). Exceeding 20 MHz may result in undefined behavior or timing violations, as confirmed in Section 6.3 of the Hardware Manual Rev.2.00. The DF36087HV does not support frequency multiplication via PLL.

Does the DF36087HV support in-system programming (ISP)?

Yes, the DF36087HV supports on-board programming via SCI3 (P21/RXD and P22/TXD) in boot mode, as documented in the Hardware Manual Rev.2.00. This capability enables firmware updates without removing the DF36087HV from the target board. Programming requires a host controller to send command sequences and data over the UART interface; no external programmer hardware is needed beyond a level-shifter for RS-232 compatibility.

Which pins on the DF36087HV are reserved for emulator use?

The DF36087HV reserves pins P85, P86, and P87 exclusively for the E7 or E8 on-chip emulator, as stated in the Preface and Section 1.4 of the Hardware Manual Rev.2.00. These pins cannot be used for general-purpose I/O when emulator debugging is active. To repurpose them, external hardware must isolate the emulator signals - a design constraint explicitly noted in the manual's "Notes on reading this manual" section.

Is the DF36087HV RoHS compliant?

Yes, the DF36087HV complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental compliance documentation. Lead-free soldering profiles and halogen-free packaging meet current regulatory requirements. Customers must verify specific lot-level compliance certificates through Renesas sales offices or authorized distributors, as material declarations are subject to revision per Note 10 in the Hardware Manual Rev.2.00.

What power-down modes does the DF36087HV support?

The DF36087HV supports four distinct power-down modes: Sleep, Standby, Subsleep, and Subactive - each controlled via SYSCR1 and SYSCR2 registers. Subsleep mode achieves ≤10 µA current draw while retaining RAM and certain peripheral clocks; Subactive mode halts the CPU but keeps peripheral clocks running for fast wake-up (<1 µs). These modes are detailed in Section 6 of the Hardware Manual Rev.2.00 and are fully implemented in the DF36087HV silicon.