Renesas DF2378RVLP34V

Overview

DF2378RVLP34V 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 A/D, 8-bit D/A, WDT, DMAC/EXDMAC, DTC, I²C bus interface (IIC2), and high-speed bus controller for DRAM interfacing. It targets embedded control in industrial automation and instrumentation.

For engineers reviewing the DF2378RVLP34V datasheet, DF2378RVLP34V pinout, DF2378RVLP34V application, or DF2378RVLP34V equivalent, key selection criteria include its 512 KB flash size, 32 KB RAM capacity, support for expanded memory modes (Mode 4/5/7), and compatibility with F-ZTAT™ reprogrammable flash technology for rapid firmware iteration during production ramp.

Technical Context

The DF2378RVLP34V implements the H8S/2000 CPU core with a 32-bit internal architecture, sixteen 16-bit general-purpose registers, and linear 16-Mbyte address space support. 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)-each defining distinct memory map configurations.

Its EXDMAC enables high-speed data transfer between external memory and external devices with DACK signaling, supporting source/destination address increment/decrement control via EDACR bits SAT1/SAT0 and DAT1/DAT0. The DTC provides interrupt-driven data transfers triggered by SCI and A/D converter events, with automatic register access clearing upon completion.

Key Specifications

Pinout & Package

DF2378RVLP34V is housed in a 128-pin LQFP package (14 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are mode-dependent: PA–PH ports serve as address/data multiplexed I/O or dedicated peripheral signals (e.g., TIOCA0, IRQn, φ clock input); PB–PE support data I/O and address output; PF7 serves as main clock input (φ); PD/PE pins support bidirectional data transfer with DDR control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F2378R, DF2378RVLP34V offers identical functionality with updated manufacturing traceability and environmental compliance, while H8S/2377R trades memory capacity for lower cost-making DF2378RVLP34V optimal for feature-rich industrial control where headroom matters.

Availability

DF2378RVLP34V is available at Aetrix Electronics and suitable for industrial automation, test & measurement equipment, and factory gateway systems requiring stable component supply across long product lifecycles.

Supply support for DF2378RVLP34V 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 automotive, industrial, and IoT markets.

The H8S/2378R Group, including DF2378RVLP34V, was designed for high-reliability embedded control in industrial and instrumentation applications-emphasizing flexible memory mapping, robust peripheral integration, and field-upgradable flash.

FAQ

What is the flash memory type used in DF2378RVLP34V?

The DF2378RVLP34V uses F-ZTAT™ (Flash Zero-Time Alteration Technology) single-power flash memory, allowing in-system reprogramming without UV erasure or high-voltage programming. This enables rapid firmware updates during production and field deployment, and DF2378RVLP34V retains full compatibility with Renesas' standard H8S flash programming tools and debug interfaces.

Does DF2378RVLP34V support external DRAM interfacing?

Yes, DF2378RVLP34V integrates a high-functionality bus controller that supports DRAM, SRAM, and flash memory with configurable wait states, burst access, and RAS/CAS control. Its EXDMAC can directly manage high-bandwidth transfers to/from DRAM using DACK signaling, and DF2378RVLP34V's Mode 4 and Mode 7 memory maps explicitly define DRAM address spaces for seamless expansion.

What are the key differences between DF2378RVLP34V and HD64F2378R?

DF2378RVLP34V and HD64F2378R share identical silicon, pinout, electrical characteristics, and functional specifications. DF2378RVLP34V is Renesas' updated part number reflecting post-merger branding, enhanced RoHS compliance, and improved traceability-while HD64F2378R refers to the legacy NEC/Renesas Technology marking. DF2378RVLP34V is recommended for all new designs.

Which operating modes does DF2378RVLP34V support, and how do they affect memory mapping?

DF2378RVLP34V supports three primary operating modes: Mode 4 (Expanded with on-chip ROM enabled), Mode 5 (User Boot Mode), and Mode 7 (Single-Chip Activation Expanded Mode). Each defines a unique memory map-e.g., Mode 4 places 512 KB ROM at H'000000 and 32 KB RAM at H'080000, while Mode 7 enables full expanded addressing with ROM and RAM co-resident. DF2378RVLP34V mode selection is controlled via hardware pins (MD0–MD2) at reset.

Can DF2378RVLP34V perform DMA transfers with external devices that use DACK handshaking?

Yes, DF2378RVLP34V's EXDMAC fully supports DACK-based DMA transfers with external peripherals. It allows bidirectional transfers between external memory and DACK-capable devices, with source/destination address update modes (increment/decrement/fixed) configured via EDACR bits SAT1/SAT0 and DAT1/DAT0. DF2378RVLP34V also supports single-address mode transfers where EDACK and ETEND signals coordinate timing, as documented in Figure 8.3 of the Hardware Manual Rev.7.00.