Renesas DF2378BVFQ35WV

Overview

DF2378BVFQ35WV from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2378 Group, featuring an H8S/2000 CPU core, 512 KB on-chip flash ROM (F-ZTAT™), 32 KB RAM, and integrated peripherals including TPU, PPG, SCI, IrDA, 10-bit A/D, 8-bit D/A, WDT, DMAC/EXDMAC, and DTC. It operates at up to 33 MHz and supports expanded memory mode for DRAM interfacing - used in industrial control panels requiring deterministic real-time I/O handling and firmware-upgradable logic.

For engineers reviewing the DF2378BVFQ35WV datasheet, DF2378BVFQ35WV pinout, DF2378BVFQ35WV application, or DF2378BVFQ35WV equivalent, key selection criteria include its 144-pin LQFP package, F-ZTAT™ reprogrammability, dual DMA controllers (DMAC + EXDMAC), 16-Mbyte linear address space, and support for external synchronous DRAM via high-functionality bus controller.

Technical Context

The DF2378BVFQ35WV implements the H8S/2000 CPU with sixteen 16-bit general-purpose registers and a 32-bit internal data path, enabling efficient 16-bit instruction execution across a 16-Mbyte linear address space. Its memory map includes configurable boot modes (e.g., Mode 4 with on-chip ROM enabled, Mode 7 for single-chip activation with ROM).

Peripheral integration includes two independent DMA controllers: standard DMAC for internal transfers and EXDMAC for high-speed external device/memory transfers using DACK signaling. The bus controller supports 64-Mbit SDRAM (1 Mword × 16 bits × 4-bank) with 8-bit column addressing and RAS/CAS timing control.

Key Specifications

Pinout & Package

DF2378BVFQ35WV is housed in a 144-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, thermally enhanced for industrial ambient operation. Pin functions are mode-dependent (e.g., PA–PF ports serve as address/data multiplexed buses in expanded modes, GPIO in single-chip mode).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F2378R and R5F21278SNFP, DF2378BVFQ35WV uniquely combines F-ZTAT™ flash, EXDMAC with DACK, and full SDRAM controller - making it irreplaceable for legacy industrial systems requiring field-upgradable logic and high-bandwidth external memory access.

Availability

DF2378BVFQ35WV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, factory automation controllers, energy meter concentrators, and building HVAC management units requiring stable component supply across extended product lifecycles.

Supply support for DF2378BVFQ35WV 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 DF2378BVFQ35WV belongs to the H8S/2300 Series - a legacy 16-bit MCU family designed for deterministic real-time control in industrial equipment where reliability, peripheral integration, and long-term supply stability are critical.

FAQ

What is the maximum system clock frequency supported by DF2378BVFQ35WV?

The DF2378BVFQ35WV supports a maximum system clock frequency of 33 MHz. This is achieved using an external crystal or oscillator input to the φ pin, which feeds an internal PLL. The 33 MHz operation enables deterministic instruction execution and real-time peripheral response - essential for industrial control loops implemented on DF2378BVFQ35WV.

Does DF2378BVFQ35WV include on-chip flash memory, and is it reprogrammable in-system?

Yes, DF2378BVFQ35WV integrates 512 KB of on-chip flash memory using Renesas' F-ZTAT™ technology. This allows full in-system reprogramming using a single 3.3 V supply - no external programming voltage or UV erasure is needed. Firmware updates for DF2378BVFQ35WV can be performed directly in the end application without removing the chip.

What types of external memory interfaces does DF2378BVFQ35WV support?

DF2378BVFQ35WV supports external 64-Mbit synchronous DRAM (1 Mword × 16 bits × 4-bank) via its high-functionality bus controller, with dedicated RAS/CAS control pins (CS2/CS3) and programmable timing. It also supports standard SRAM and flash memory mapping in expanded operating modes - all managed without external glue logic.

How many DMA controllers are integrated into DF2378BVFQ35WV, and what are their roles?

DF2378BVFQ35WV integrates two independent DMA controllers: the standard DMAC for internal memory-to-memory or peripheral-to-memory transfers, and the EXDMAC for high-speed transfers between external memory/devices and internal resources using DACK handshaking. This dual-DMA architecture offloads the CPU during bulk data movement - a key capability of DF2378BVFQ35WV in data-intensive industrial applications.

Is DF2378BVFQ35WV pin-compatible with other members of the H8S/2378 Group?

No, DF2378BVFQ35WV is not universally pin-compatible across the H8S/2378 Group. While it shares the 144-pin LQFP package with some variants (e.g., HD64F2378R), pin functions differ significantly based on operating mode and peripheral enable settings - especially for address/data multiplexing and interrupt routing. Direct substitution requires validation of signal mapping and mode configuration for DF2378BVFQ35WV.