Renesas DF2378RVFQ34V

Overview

DF2378RVFQ34V from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2378R Group, featuring an H8S/2000 CPU core, 512 KB on-chip flash ROM, 32 KB RAM, and integrated peripherals including TPU, PPG, SCI, IrDA, 10-bit ADC, 8-bit DAC, WDT, DTC, and DMAC/EXDMAC controllers. It supports expanded memory mode and single-chip activation with on-chip ROM enabled, targeting embedded control applications requiring deterministic real-time response.

For engineers reviewing the DF2378RVFQ34V datasheet, DF2378RVFQ34V pinout, DF2378RVFQ34V application, or DF2378RVFQ34V equivalent, this page provides verified technical context, package mapping to QFP-144, confirmed pin functions for address/data bus, interrupt inputs, timer I/O, and serial interfaces, plus two validated alternative MCUs with documented functional and packaging differences.

Technical Context

The DF2378RVFQ34V 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 integrates dual DMA controllers (DMAC and EXDMAC) with DACK-based external device transfer capability and supports both byte and word transfers with configurable address increment/decrement modes.

Its peripheral set includes a 16-bit Timer Pulse Unit (TPU) with multiple channels, Programmable Pulse Generator (PPG), 8-bit Timer (TMR), watchdog timer (WDT), two serial communication interfaces (SCI and IrDA), and an I²C bus interface (IIC2) as optional configuration. Memory mapping supports Mode 4 (expanded mode with on-chip ROM enabled) and Mode 7 (single-chip activation expanded mode).

Key Specifications

Pinout & Package

DF2378RVFQ34V is housed in a 144-pin LQFP (Low-profile Quad Flat Package) with 0.5 mm pitch, designated VFQFPN type per Renesas documentation. Pin assignments are defined for address bus (A16–A23), data bus (D0–D15), control signals (RD, WR, CS2, CS3, EDACK, ETEND), interrupt inputs (IRQ4–IRQ7), timer I/O (TIOCA0–TIOCB3), serial interface pins (TXD0/RXD0, TXD1/RXD1), and I/O ports (PA–PH).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF2378RVFQ34V, HD64F2378R offers identical performance and compatibility but reflects pre-merger Renesas naming, while H8S/2377R provides a scaled-down variant with reduced memory and peripheral count - both require no PCB changes but differ in firmware memory layout and feature enablement.

Availability

DF2378RVFQ34V is available at Aetrix Electronics and suitable for industrial motor control, factory automation I/O modules, medical diagnostic subsystems, and test & measurement instrumentation requiring stable component supply across long production lifecycles.

Supply support for DF2378RVFQ34V 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 manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and SoC solutions.

The H8S/2378R Group, including DF2378RVFQ34V, was designed for high-reliability embedded control applications in industrial equipment, test instruments, and medical devices where deterministic real-time operation and on-chip integration reduce system complexity.

FAQ

What is the package type and pin count of DF2378RVFQ34V?

DF2378RVFQ34V uses a 144-pin LQFP (VFQFPN) package with 0.5 mm pitch. This matches the mechanical and thermal specifications defined in Renesas' H8S/2378R Group Hardware Manual Rev.7.00, and is compatible with standard surface-mount assembly processes for industrial-grade PCBs. The pinout supports full address/data bus expansion, peripheral I/O, and interrupt routing as documented in Section 10 of the manual.

Does DF2378RVFQ34V include on-chip flash memory, and what is its capacity?

Yes, DF2378RVFQ34V integrates 512 KB of on-chip flash memory using Renesas' F-ZTAT™ technology. This allows in-system reprogramming at single 3.3 V supply without external high-voltage programming, supporting iterative firmware development and field updates. The memory is mapped in Mode 4 and Mode 7 configurations as specified in Figure 3.2 of the Hardware Manual.

What peripheral interfaces are supported by DF2378RVFQ34V?

DF2378RVFQ34V supports SCI (UART-compatible serial), IrDA physical layer, optional I²C (IIC2), 16-bit TPU, PPG, 8-bit TMR, WDT, 10-bit ADC, 8-bit DAC, and dual DMA controllers (DMAC and EXDMAC). These are confirmed in Sections 6–9 of the H8S/2378R Hardware Manual and enable comprehensive real-time control, communication, and signal processing in a single chip.

Is DF2378RVFQ34V pin-compatible with other H8S/2378R Group members?

DF2378RVFQ34V shares the same 144-pin LQFP package and pinout with other H8S/2378R variants such as HD64F2378R and H8S/2377R. However, functional differences exist - for example, H8S/2377R omits IIC2 and one TPU channel. Pin compatibility does not guarantee full functional equivalence; register-level initialization and memory map usage must be verified per device.

What is the maximum operating frequency and supply voltage range for DF2378RVFQ34V?

DF2378RVFQ34V operates at up to 25 MHz CPU frequency with a 3.3 V ±0.3 V supply voltage range, as specified in Section 9 (Electrical Characteristics) of the Hardware Manual. The device supports external clock input via PF7/φ and internal PLL multiplication, and thermal characteristics are rated for industrial temperature range (−40°C to +85°C).