Renesas DF2378BVFQ35V

Overview

DF2378BVFQ35V from Renesas Electronics is a 16-bit single-chip microcontroller (MCU) based on the H8S/2000 CPU core, featuring 512 KB on-chip flash ROM, 32 KB RAM, and integrated peripherals including TPU, PPG, SCI, IrDA, 10-bit ADC, 8-bit DAC, DMAC/EXDMAC, DTC, WDT, and I²C interface (IIC2 optional). It operates at up to 33 MHz in single-chip mode and targets embedded control applications requiring deterministic real-time response and peripheral integration.

For engineers reviewing the DF2378BVFQ35V datasheet, DF2378BVFQ35V pinout, DF2378BVFQ35V application, or DF2378BVFQ35V equivalent, key selection considerations include its 144-pin LQFP package, 3.3 V supply operation, F-ZTAT flash reprogrammability, memory-mapped I/O architecture, and support for expanded bus modes with DRAM interfacing capability.

Technical Context

The DF2378BVFQ35V implements the H8S/2000 32-bit internal architecture with sixteen 16-bit general-purpose registers and a 16-Mbyte linear address space. It supports multiple operating modes-including user boot mode (Mode 5), expanded mode with on-chip ROM enabled (Mode 4), and single-chip activation expanded mode (Mode 7)-enabling flexible memory mapping and external bus expansion.

Its peripheral set includes dual DMA controllers (DMAC and EXDMAC), a data transfer controller (DTC), and a high-functionality bus controller supporting synchronous DRAM (e.g., 64-Mbit, 1 Mword × 16-bit × 4-bank) with configurable byte control (DQMU/DQML), RAS/CAS timing, and EDACK-driven transfers. The TPU provides precise pulse generation and capture across multiple channels.

Key Specifications

Pinout & Package

DF2378BVFQ35V is housed in a 144-pin LQFP package (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are mode-dependent: PA–PF, PH, PJ, PK, PL, PM, PN, and PP serve as multiplexed address/data/control lines, I/O ports, or peripheral signal terminals (e.g., TIOCA0, SCI0TXD, ADTRG, φ). Dedicated pins include RESET, VCC, VSS, CLK, EXTAL, and EDACKn.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21278SNFP, DF2378BVFQ35V delivers higher deterministic performance, richer analog/motion peripherals, and external memory scalability; versus H8S/2368FV, it doubles flash and RAM while retaining full pin and software compatibility - making it optimal for feature-rich industrial upgrades.

Availability

DF2378BVFQ35V is available at Aetrix Electronics and suitable for industrial motor control, factory automation, test instrumentation, and communications equipment requiring stable component supply, long-term lifecycle support, and consistent electrical specifications across production batches.

Supply support for DF2378BVFQ35V 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 H8S/2300 Series - including DF2378BVFQ35V - was designed for high-reliability embedded control applications demanding real-time responsiveness, integrated peripherals, and field-upgradable flash in industrial and test equipment environments.

FAQ

What is the maximum operating frequency of the DF2378BVFQ35V?

The DF2378BVFQ35V operates at a maximum system clock frequency of 33 MHz in single-chip mode. This frequency is achieved using an on-chip PLL that multiplies an external crystal input (e.g., 8.25 MHz or 16.5 MHz). At this speed, the H8S/2000 core delivers deterministic instruction execution with typical interrupt latency under 1 µs, making DF2378BVFQ35V suitable for time-critical control loops in motor drives and measurement systems.

Does the DF2378BVFQ35V support external memory expansion?

Yes, the DF2378BVFQ35V supports external memory expansion through its high-functionality bus controller, which handles asynchronous and synchronous DRAM interfaces. It explicitly supports 64-Mbit synchronous DRAM with 1 Mword × 16-bit × 4-bank configuration and 8-bit column addressing. Control signals including RAS, CAS, EDACK, and ETEND are provided, and timing is configurable via registers such as EDACR and EDMDR - enabling DF2378BVFQ35V to serve as host for large data buffers in imaging or logging applications.

What type of flash memory does the DF2378BVFQ35V use, and how is it programmed?

The DF2378BVFQ35V uses Renesas' proprietary F-ZTAT (Flash Zero Turnaround Time) flash technology - a single-power, 512 KB on-chip flash memory that supports in-system programming without high-voltage assist or external programmers. Programming is performed via on-chip boot routines or debug interface (e.g., E8 emulator), allowing full firmware updates in the field. DF2378BVFQ35V retains program memory integrity across 10,000 write/erase cycles and 20-year data retention, critical for industrial deployments.

Can the DF2378BVFQ35V generate PWM signals for motor control?

Yes, the DF2378BVFQ35V integrates a 16-bit Timer Pulse Unit (TPU) with four independent channels capable of generating precise PWM waveforms with programmable duty cycle, period, and dead-time insertion. Each channel supports complementary output, phase-shifted timing, and synchronization with ADC conversion triggers - enabling DF2378BVFQ35V to directly drive 3-phase inverter gate drivers in BLDC or PMSM motor control without external timers or FPGA logic.

Is the DF2378BVFQ35V pin-compatible with other H8S/2300 series MCUs?

DF2378BVFQ35V is pin-compatible with other 144-pin LQFP variants in the H8S/2378 and H8S/2378R groups, including HD64F2378R and H8S/2368FV, when configured in identical operating modes (e.g., Mode 7). Pin functions for PA–PF, PH, PJ–PP, and control signals (RESET, CLK, EDACK) match across these devices. However, differences in flash size, RAM, and optional peripherals (e.g., IIC2 presence) require verification of register initialization and firmware adaptation - DF2378BVFQ35V maintains binary compatibility for shared peripheral code within the H8S/2300 family.