Motorola MC68340 manual Minimum System Configuration Block Diagram 10-2

Models: MC68340

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Freescale Semiconductor, Inc.

11/2/95

Freescale Semiconductor, Inc.

UM Rev.1.0

SECTION 1: OVERVIEW

LIST OF ILLUSTRATIONS (Continued)

Figure

 

P a g e

Number

Title

Number

9-3

Output Latch Cell (O.Latch)

9-7

9-4

Input Pin Cell (I.Pin)

9-7

9-5

Active-High Output Control Cell (IO.Ctl1)

9-8

9-6

Active-Low Output Control Cell (IO.Ctl0)

9-8

9-7

Bidirectional Data Cell (IO.Cell)

9-9

9-8

General Arrangement for Bidirectional Pins

9-9

9-9

Bypass Register

9-11

10-1

Minimum System Configuration Block Diagram

10-1

10-2

Sample Crystal Circuit

10-2

10-3

Statek Corporation Crystal Circuit

10-2

10-4

XFC and VCCSYN Capacitor Connections

10-3

10-5

SRAM Interface

10-3

10-6

ROM Interface

10-4

10-7

Serial Interface

10-5

10-8

External Circuitry for 8-Bit Boot ROM

10-5

10-9

8-Bit Boot ROM Timing

10-6

10-10

Access Time Computation Diagram

10-6

10-11

Signal Relationships to CLKOUT

......................................................................

10-7

10-12

Signal Width Specifications

10-8

10-13

Skew between Two Outputs

10-9

10-14

Circuitry for Interfacing 8-Bit Device to 16-Bit Memory in

 

 

Single-Address DMA Mode

10-10

10-15

MC68340 Current vs. Activity at 5 V

10-11

10-16

MC68340 Current vs. Voltage/Temperature

10-12

10-17

MC68340 Current vs. Clock Frequency at 5 V

10-12

11-1

Drive Levels and Test Points for AC Specifications

11-4

11-2

Read Cycle Timing Diagram

11-11

11-3

Write Cycle Timing Diagram

11-12

11-4

Fast Termination Read Cycle Timing Diagram

11-13

11-5

Fast Termination Write Cycle Timing Diagram

11-14

11-6

Bus Arbitation Timing—Active Bus Case

11-15

11-7

Bus Arbitration Timing—Idle Bus Case

11-16

11-8

Show Cycle Timing Diagram

11-16

11-9

IACK Cycle Timing Diagram

11-17

11-10

Background Debug Mode Serial Port Timing

11-18

11-11

Background Debug Mode FREEZE Timing

11-18

11-12

DMA Signal Timing Diagram

11-19

11-13

Timer Module Clock Signal Timing Diagram

11-20

11-14

Timer Module Signal Timing Diagram

11-21

11-15

Serial Module General Timing Diagram

11-22

xx

MC68340

USER'S MANUAL

MOTOROLA

 

For More Information On This Product,

 

 

Go to: www.freescale.com

 

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Motorola MC68340 manual Minimum System Configuration Block Diagram 10-2

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.