Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

PREFACE

The complete documentation package for the MC68340 consists of the MC68340UM/AD, MC68340 Integrated Processor with DMA User’s Manual, M68000PM/AD, MC68000 Family Programmer’s Reference Manual, and the MC68340P/D, MC68340 Integrated Processor with DMA Product Brief.

The MC68340 Integrated with DMA Processor User’s Manual describes the programming, capabilities, registers, and operation of the MC68340; the MC68000 Family Programmer’s Reference Manual provides instruction details for the MC68340; and the MC68340 Integrated Processor with DMA Product Brief provides a brief description of the MC68340 capabilities.

This user’s manual is organized as follows:

Section 1

Device Overview

Section 8

Timer Modules

Section 2

Signal Descriptions

Section 9

IEEE 1149.1 Test Access

Section 3

Bus Operation

 

Port

Section 4

System Integration Module

Section 10

Applications

Section 5

CPU32

Section 11

Electrical Characteristics

Section 6

DMA Controller Module

Section 12 Ordering Information and

Section 7

Serial Module

 

Mechanical Data

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Motorola MC68340 manual Preface, CPU32
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MC68340 specifications

The Motorola MC68340 is a highly integrated microprocessor that was introduced in the early 1990s. It belongs to the 68000 family of microprocessors and is designed to cater to the demands of embedded systems, particularly in telecommunications and networking applications. This chip represents a significant evolution in microprocessor technology by combining a microprocessor core with additional peripherals on a single chip, making it an attractive solution for engineers looking to design compact and efficient systems.

One of the key features of the MC68340 is its 32-bit architecture, which allows for significant processing power and data handling capabilities. This architecture enables the processor to handle larger data sizes and perform more complex calculations compared to its 16-bit predecessors. The MC68340 operates at clock speeds typically ranging from 16 MHz to 25 MHz. Its dual instruction pipeline enhances throughput, allowing for simultaneous instruction fetches and executions, which significantly boosts performance.

A notable characteristic of the MC68340 is the inclusion of integrated peripherals, which help reduce the overall component count in a system. Key integrated components include a memory management unit (MMU), a direct memory access (DMA) controller, and various communication interfaces such as serial ports. The memory management capabilities enhance the processor's ability to manage memory resources efficiently, enabling it to support multitasking environments commonly found in modern computing.

In terms of connectivity, the MC68340 features connections for both synchronous and asynchronous serial communication, making it well-suited for networking tasks. The processor supports a range of bus standards, including address and data buses, which facilitate seamless interaction with peripheral devices.

Another important aspect of the MC68340 is its flexibility. The processor supports multiple operating modes, including multiple CPU configurations and compatibility with the Motorola 68000 family, allowing for easier integration into existing systems.

Moreover, the MC68340 boasts low power consumption compared to many of its contemporaries, making it an excellent choice for battery-operated applications, enhancing its appeal in sectors like telecommunications, industrial control, and automotive systems. Its combination of performance, integration, versatility, and efficiency has secured the MC68340 a reputable position in the annals of embedded systems technology, proving to be a valuable asset for developers and engineers alike.
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