Densan DVE-SH7604 (9271)

Digital guide

Product Introduction
The Densan JDVE-SH7604 (9271) is treated as a Densan embedded controller carrying the SH7604 RISC microprocessor. The “J” prefix may indicate a product family, revision, or customized I/O variant, but no public specification confirms that interpretation. Engineering use should rely on the official J-series schematic. The controller is based on the SH7604 32-bit RISC single-chip microcontroller built on the SuperH architecture, integrating CPU core, cache, multiplier, divide unit, direct memory access controller, timers, serial interface, interrupt controller, and bus state controller.

WhatApp

WeChat

Detailed content

Technical Specifications
The underlying SH7604 microprocessor is a 32-bit RISC device operating at up to 28.7 MHz in a 144-pin PQFP package. It supports synchronous and asynchronous serial communication, DRAM and pseudo-SRAM interfaces, and burst read single write operations with configurable CAS latency and burst length. The JDVE-SH7604 (9271) board-level specifications, including the J-prefix configuration specifics, are not published in retrieved public documentation.

Functional Features
The JDVE-SH7604 (9271) provides the processing, memory interfacing, serial communication, and interrupt handling capabilities of the SH7604 microcontroller. The J-prefix may denote a customized I/O variant, but this is not confirmed. The device includes two internal bus masters (CPU and DMAC) and supports refresh control for DRAM and pseudo-SRAM. A serial communication interface supports both asynchronous and clocked synchronous operation with multiprocessor communication capability.

Application Scenarios
Embedded real-time control, communication management, and VME/industrial I/O orchestration. The J-prefix variant may target specific I/O or customization requirements, but the exact application scope is not documented in public sources.

Material Composition
Printed circuit board assembly with the SH7604 microcontroller and supporting components. Specific material composition is not published.

Structural Characteristics
Embedded controller board form factor. The 9271 suffix identifies a specific board revision or configuration. The J-prefix may indicate a product family or customized variant.

Working Principle
Centered on the SH7604 RISC processor executing SuperH instructions. The integrated bus state controller manages external memory including synchronous DRAM, DRAM, and pseudo-SRAM. The DMAC handles data transfers. The SCI provides serial communication. The interrupt controller manages prioritized interrupts.

Installation Requirements
Installation requirements for the JDVE-SH7604 (9271) must be confirmed from the official J-series schematic and Densan documentation. Power-on sequencing requirements for synchronous DRAM initialization apply as with the standard DVE-SH7604.

Usage Precautions
Engineering use should rely on the official J-series schematic. The J-prefix interpretation as a product family, revision, or customized I/O variant is not confirmed by public specification. The SH7604 does not support little-endian mode for 8-bit data bus devices. Endian conversion is limited to the CS2 space.