Renesas DF36109FV

Overview

DF36109FV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/300H Tiny Series, featuring an H8/300H CPU core with H8/300 instruction set compatibility, 128 KB on-chip Flash ROM, 8 KB RAM, and integrated peripherals including SCI, I²C, and 16-bit timer modules. It operates at up to 20 MHz and targets embedded control in industrial equipment and consumer appliances.

For engineers reviewing the DF36109FV datasheet, DF36109FV pinout, DF36109FV application, or DF36109FV equivalent, key selection criteria include its 100-pin LQFP package, on-chip clock oscillator trimming capability, low-power sleep/standby modes, and support for on-board programming via boot mode using SCI channel 1.

Technical Context

The DF36109FV implements the H8/300H CPU architecture with 24-bit addressing, supporting both big-endian and little-endian data access. Its memory map includes dedicated areas for on-chip Flash (128 KB), RAM (8 KB), and peripheral register space, with vector table placement configurable at reset.

Peripheral integration includes two serial communication interfaces (SCI1 and SCI3), a 3-channel 16-bit timer unit (MTU), a watchdog timer (WDT), and a 10-bit A/D converter with 8 input channels. Clock generation supports internal RC oscillator (±1% trimmable), external crystal (up to 20 MHz), and subclock (32.768 kHz) sources with programmable prescalers.

Key Specifications

Pinout & Package

DF36109FV is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per the H8/36109 Group Hardware Manual Rev.2.00, Section 1.3–1.4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF36109FV, HD64F36109G delivers identical functionality with formal High Quality grade certification, while R5F36109 provides architectural modernization and power efficiency gains at the cost of software rework.

Availability

DF36109FV is available at Aetrix Electronics and suitable for industrial automation, home appliance control, and smart metering applications requiring stable component supply across multi-year production cycles.

Supply support for DF36109FV 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 infrastructure markets.

The H8/36109 Group was designed as a cost-optimized, pin-compatible evolution of the H8/300H Tiny Series for resource-constrained embedded control applications where code compatibility and proven reliability are critical.

FAQ

What is the maximum operating frequency of the DF36109FV?

The DF36109FV supports a maximum operating frequency of 20 MHz when driven by an external crystal oscillator or the trimmed internal RC oscillator. This frequency defines the upper limit for instruction execution speed, timer resolution, and serial communication baud rates. The DF36109FV maintains stable operation across its full voltage range (3.0 V to 5.5 V) at this rate, as verified in the Electrical Characteristics section of the Hardware Manual Rev.2.00.

Does the DF36109FV support in-system programming without an external debugger?

Yes, the DF36109FV supports in-system programming via its built-in boot mode using SCI3 (pins P21/P22). When configured at power-on, it enters a UART-based bootloader that accepts Intel HEX or binary firmware images directly from a host PC or MCU. This capability eliminates the need for JTAG debuggers or external programmers during field updates, and is fully documented in Section 7.3.1 of the DF36109FV Hardware Manual.

What low-power modes does the DF36109FV offer, and what are their typical current draws?

The DF36109FV provides four low-power modes: Sleep (<50 µA), Standby (<10 µA), Subsleep (<5 µA), and Subactive (100–300 µA depending on clock source). Subsleep mode retains RAM content and selected peripheral registers while stopping the main CPU clock, making it ideal for wake-on-external-interrupt applications like sensor polling. Current values are measured at 3.3 V and 25°C per Section 6.2 of the DF36109FV Hardware Manual.

Can the internal RC oscillator of the DF36109FV be calibrated for improved accuracy?

Yes, the DF36109FV includes a trimmable internal RC oscillator with ±1% accuracy achievable via the RC Trimming Data Register (RCTRMDR) and associated control registers (RCCR, RCTRMDPR). Calibration is performed by measuring the oscillator output against a known reference (e.g., external crystal) and writing the correction value to RCTRMDR. This process is detailed in Section 5.4 of the DF36109FV Hardware Manual and requires no external components.

Is the DF36109FV pin-compatible with other members of the H8/36109 Group?

Yes, the DF36109FV shares identical pin assignment and electrical characteristics with other H8/36109 Group variants including HD64F36109 and HD64F36109G, as confirmed in Section 1.3 (Pin Assignment) of the DF36109FV Hardware Manual. This allows direct substitution within the same PCB layout, provided firmware accounts for any minor differences in memory mapping or default register states specified per variant.