Motorola 009 Manual do Utilizador descarregar pdf (Página 17)

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System Overview

System Operation

MOTOROLA

SHI Port Usage

2-5

Figure 2-2

DSP-MCU System Flow Diagram

Hardware

Reset

HRNE = 0?

Yes

Read HRX

512 Words

Yes

HREQ = 0?

Send Word

512 Words

Yes

Move to Program

Enable Program

Init Peripherals

and Core

JMP *

Init Peripherals

JMP *

User Presses Button

MCU Calls

HREQ = 0?

Yes

Send Button

Exit Interrupt RoutineExit Interrupt Routine

Sent?

Received?

Read HRX

Construct GPIO Word

Write GPIOR

Interrupt Routine

MCU Operation DSP Operation

DSP Boot ROM Program DSP Run-time Application

Number

Causes HRNE=1

Generates SHI Interrupt

DSP Calls Service Routine

AA1416

RAM

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 25 26

Booting and Simple Usage 1
Port in SPI Mode 1
TABLE OF CONTENTS 3
LIST OF FIGURES 5
LIST OF EXAMPLES 7
SECTION 1 9
INTRODUCTION 9
Introduction 10
Figure 1-1 12
SECTION 2 13
SYSTEM OVERVIEW 13
System Overview 14
2.1 SYSTEM OPERATION 15
System Operation 16
Figure 2-2 17
DSP-MCU System Flow Diagram 17
2.2 DSP SUBSYSTEM CODE 18
2.2.1 DSP Boot from Reset 18
Example 2-1 19
DSP Subsystem Code 20
SECTION 3 23
CONCLUSION 23
Conclusion 24
3.1 CONCLUSION 25
3.2 EXAMPLE CODE 25
3-4 SHI Port Usage MOTOROLA 26

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