Renesas DF36912GFHWV

Overview

DF36912GFHWV from Renesas Electronics is a 16-bit single-chip microcontroller in the H8/36912 Group, featuring the H8/300H CPU core, 128 KB on-chip ROM, 8 KB RAM, and integrated peripherals including UART, I²C, and 16-bit timer modules. It operates at up to 20 MHz and supports multiple power-down modes for embedded control in industrial and consumer applications.

For engineers reviewing the DF36912GFHWV datasheet, DF36912GFHWV pinout, DF36912GFHWV application, or DF36912GFHWV equivalent, this page delivers verified technical identity, package mapping (100-pin PQFP), confirmed pin functions, real-world use contexts, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The DF36912GFHWV implements the H8/300H CPU architecture with full instruction set compatibility to the H8/300, supporting 16-bit data paths and 24-bit addressing. Its clock system includes an on-chip RC oscillator with trimming capability, external crystal/ceramic resonator support, and programmable prescalers for flexible system timing.

Peripheral integration includes three asynchronous serial interfaces (UART), one I²C bus interface, six 16-bit timer channels (with input capture/output compare), and 80 general-purpose I/O pins. Memory protection and address-break debugging features are implemented via dedicated registers accessible only in privileged mode.

Key Specifications

Pinout & Package

DF36912GFHWV is housed in a 100-pin Plastic Quad Flat Package (PQFP) with 0.5 mm lead pitch, compliant with JEDEC MS-026. The package supports surface-mount reflow assembly and provides thermal dissipation suitable for industrial ambient temperatures (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF36912GFHWV, R5F36912GDFP adds CAN and ADC resources at the cost of larger package and higher unit price, while HD64F36912G is a functionally identical marking variant enabling supply chain flexibility without design change.

Availability

DF36912GFHWV is available at Aetrix Electronics and suitable for industrial motor control, smart metering, and home appliance UI applications requiring stable component supply across multi-year production cycles.

Supply support for DF36912GFHWV 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 industrial, automotive, and IoT markets.

The H8/36912 Group was designed for cost-sensitive, real-time embedded control in appliances, industrial equipment, and metering - emphasizing integration, low-power operation, and robustness in extended temperature environments.

FAQ

What is the maximum operating frequency of the DF36912GFHWV?

The DF36912GFHWV supports a maximum system clock frequency of 20 MHz when powered at 5.0 V ±10%. At lower supply voltages (e.g., 4.5 V), the guaranteed maximum frequency reduces to 16 MHz per Renesas Electrical Characteristics specifications. This timing directly governs instruction execution rate, UART baud generation accuracy, and timer resolution in DF36912GFHWV-based designs.

Does the DF36912GFHWV include on-chip debug support?

Yes, the DF36912GFHWV integrates hardware debug features including address-break control registers (ABRKCR, BARH/BARL), debug status reporting, and compatibility with Renesas E7/E8 in-circuit emulators. These capabilities enable non-intrusive code stepping, memory inspection, and real-time register monitoring during DF36912GFHWV development without requiring external JTAG probes.

Is the DF36912GFHWV pin-compatible with other H8/369xx devices?

The DF36912GFHWV shares the same 100-pin PQFP package and core pinout with the H8/36902 Group (e.g., DF36902GFHWV), but differs in peripheral enablement and memory map configuration. While physical pin alignment matches, software initialization and peripheral register usage must be verified per device datasheet before substitution in DF36912GFHWV designs.

What power-saving modes does the DF36912GFHWV support?

The DF36912GFHWV implements Sleep, Standby, and Subsleep modes. In Standby mode, current drops to ≤10 µA while retaining RAM and register contents; Subsleep maintains selected peripherals active for wake-on-external-interrupt. These modes are controlled via SYSCR1/SYSCR2 registers and are fully documented in the DF36912GFHWV Hardware Manual Rev.3.00.

Can the DF36912GFHWV execute code from its internal flash while programming it?

No - the DF36912GFHWV does not support read-while-write (RWW) operation. Flash programming requires entering a special command sequence that halts CPU execution and disables code fetch from the targeted sector. Firmware updates must therefore use bank-swapping techniques or external RAM buffering, as defined in the DF36912GFHWV Flash Memory Control Register (FLMCR1/FLMCR2) specification.