Texas Instruments MSP53C691 Bedienungsanleitung

MSP53C691 Speech

Synthesizer

December 2000 MSDS Speech

User’s Guide

SPSU020

IMPORTANT NOTICE

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any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TIdeemsnecessarytosupport thiswarranty. Specifictestingofallparameters ofeachdevice isnotnecessarily

performed, except those mandated by government requirements.

Customers are responsible for their applications using TI components.

In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.

TIassumes noliabilityforapplicationsassistance orcustomer productdesign. TIdoes notwarrantorrepresent

thatanylicense,eitherexpressorimplied,isgrantedunderanypatentright,copyright,maskworkright,orother

intellectual property right of TI covering or relating to any combination, machine, or process in which such

semiconductor products or services might be or are used. TI’s publication of information regarding any third

party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

How to Use This Manual

iii

Read This First

Preface

Read This First

About This Manual

This user’s guide provides information on the MSP53C691 mixed signal pro-

cessor. This information includes architecture overview, detailed architecture

description, assembly language instruction set, code development tools, and

customer information.

How to Use This Manual

This document contains the following chapters:

Chapter 1—Introduction

Chapter 2—MSP53C691 Hardware Description

Chapter 3—MSP53C691 Software Description

Chapter 4—MSP53C691 Timing Considerations

Appendix A—Designing the Master Microcontroller Software

Appendix B—FM Synthesis

Appendix C—Editing Tools and Data Preparation

Appendix D—Pitch and Speech Shifting for 6xx MELP

Appendix E—Guidelines for Optimal TI Speech

Related Documentation From Texas Instruments

Information About Cautions

This book contains cautions.

This is an example of a caution statement.

A caution statement describes a situation that could potentially

damage your software or equipment.

The information in a caution is provided for your protection. Please read each

caution carefully.

Related Documentation From Texas Instruments

SPSS023B Data sheet, MSP50C614

SPSU014 User’s guide, MSP50C614

SPSS028A Data sheet, MSP50C604

SPSU014 User’s guide, MSP50C604

Running Title—Attribute Reference

Chapter Title—Attribute Reference

Contents

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 MSP53C691 Device 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Pin Assignments and Description 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 DAC Information 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6 Algorithms Supported 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 MSP53C691 Hardware Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 MSP53C691 Interface Overview 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Microprocessor Interface Description 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.1 4-Bit Mode 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.2 8-Bit Mode 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Read Operation by the Master 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Write Operation by the Master 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 MSP53C691 Device Initialization 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 Microprocessor Interface Timing 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 MSP53C691 Software Description 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Software Overview 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Commands and Data Streams 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Sequence of Command Codes and Data Streams 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.1 Command Header 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.2 Parameters 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.3 Return Values 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Command Codes 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 Description of the Command Codes 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.1 Command Header 1—Configure Internal Registers 3-8. . . . . . . . . . . . . . . . . . . . . .

3.5.2 Command Header 2—Set/Clear I/O Ports, PD4 Through PD7 3-10. . . . . . . . . . . .

3.5.3 Command Header 3—Read Contents of I/O Ports 3-11. . . . . . . . . . . . . . . . . . . . . .

3.5.4 Command Header 4—Start Speaking 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.5 Command Header 5—Stop Speaking 3-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.6 Command Header 6—Adjust the Volume 3-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.7 Command Header 7—Return Buffer Status 3-32. . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.8 Command Header 8—Initiate Sleep 3-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.9 Command Header 9—Receive FM Data 3-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.10 Command Header A—Perform Speed Shift or Pitch Shift 3-33. . . . . . . . . . . . . . . .

4 MSP53C691 Timing Considerations 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 General Constraints 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference

4.2 MSP53C391 Timing Waveforms 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2.1 CELP/MELP 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2.2 MIX Mode 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A Designing the Master Microcontroller Software A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B FM Synthesis B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C Editing Tools and Data Preparation C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D Pitch and Speed Shifting for 6xx MELP D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E Guidelines for Optimal TI Speech E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

1–1 MSP53C691 Pin Assignments 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 MSP53C691 Interfacing Diagram—4-Bit Mode 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 MSP53C691 Interfacing Diagram—8-Bit Mode 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Data Transfer—Read 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 Data Transfer—Write 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5 MSP53C691 RESET Diagram 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–6 Device Initialization 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–7 Oscillator and PLL Connection 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1 MSP53C691 Hardware Interface Connection 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A–1 Program Flow for the Master Main Routine A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A–2 Program Flow for an ISR Tied to the Falling Edge of OUTRDY A-4. . . . . . . . . . . . . . . . . . . . . .

A–3 Program Flow for an ISR Tied to the Falling Edge of INRDY to Play Mixed Mode A-5. . . . . .

A–4 Routine for Sending Data or Commands to the Slave A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A–5 Program Flow for ISR Tied to the Falling Edge of INRDY to Play CELP/MELP Only A-7. . . .

B–1 FM Conversion Process B-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

1–1 MSP53C691 Signal Description 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 Command Codes 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B–1 Command Summary B-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D–1 Pitch Control D-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D–2 Speed Shifting Summary D-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

This chapter briefly describes the features, hardware, and software of the

MSP53C691 speech synthesizer.

Topic Page

1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 MSP53C691 Device 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Pin Assignments and Description 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 D/A Information 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6 Algorithms Supported 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Description

1-2

1.1 Description

TheMSP53C691isa standard slave synthesizer fromTexasInstrumentsthat

accepts compressed speech data from other microprocessors/microcontrol-

lers and converts it to speech. This allows the TI MSP53C691 to be used with

a master microprocessor/microcontroller in various speech products, includ-

ing electronic learning aids, games, and toys. (When referring to the

MSP53C691 device in this guide, the terms slave and MSP53C691 are used

interchangeably, and the terms master and microcontroller are used inter-

changeably.)

The MSP53C691 supports several speech synthesis algorithms to permit

tradeoffs that meet the price performance requirements of different markets.

It also incorporates a single-channel FM synthesis routine for music genera-

tioncombinedwithcodebook-exitedlinear-predictive(CELP)codingormixed-

excitation linear prediction (MELP) coding.

The MSP53C691 is a special program that runs on the MSP50C604 device.

FormoreinformationabouttheMSP50C604,please refertothelatest version

of the MSP50C604 data sheet (literature number SPSS28A) and to the

SP50x6x User’s Guide

(literature number: SPSU014).

1.2 Features

The device incorporates a wide range of algorithms on one chip. This

rangeallowsusersto choose fromlowbitratetohigh-quality synthesizing

routines for their application. The following algorithms are included:

MELP v 3.4 1.0 kbps—3.5 kbps (at 8 Khz sampling rate)

CELP v3.4 3.0 kbps, 3.7 kbps, 4.5 kbps, 6.2 kbps, 7.7 kbps, and

11.2 kbps (at 8 kHz sampling rate)

ADPCM

Single-channel FM synthesis

Single-channel FM with CELP or MELP (mixed mode)

Six-level digital gain control

Interrupt-driven data transfer for speech or command

Four customer-configurable I/Os

Option for four- or eight-bit data bus

Eight-bit data bus with four control lines

Four-bit data-bus with five control lines

Low power (less than 10 µA) sleep mode for long battery life

Three different sleep modes

MSP53C691 Device

1-3

Introduction

A choice of oscillator control

Theinternaloscillatorcanbecontrolledwitha1%resistorforlowcost,

or a standard 32.768-kHz crystal for higher precision.

Speed and pitch shifting in MELP

Stops speaking at any time (only in 4-bit mode)

Supports sending commands to perform certain tasks while speaking

(only in 4-bit mode)

Operating voltage 3 V–5.2 V

Direct speaker drive, 32 Ω

Available in die form or 64-pin LQFP package option

1.3 MSP53C691 Device

TheMSP53C691isoptimizedtosupportafour-bit-widedatatransferprotocol.

The MSP53C691 has two status bits and three control bits which control the

communication protocol between the master and the slave. The MSP53C691

also has one bit (data/command) which differentiates between command or

speech data feeding into the slave.

The MSP53C691 also supports the 8-bit wide data transfer but support for

commands is disabled. Switching between 4-bit mode or 8-bit mode is per-

mitted between speech data files.

MSP53C691

(4-bit mode) MSP53C691

(8-bit mode)

Number of data lines 4 8

Number of control lines 3 (strobe, R/W, data/command) 2 (strobe, R/W)

Number of status lines 2 (INRDY, OUTRDY) 2 (INRDY, OUTRDY)

Number of general-purpose I/O lines 4 4

Support for commands (while speaking) Yes No

Pin Assignments and Description

1-4

1.4 Pin Assignments and Description

Figure 1–1 shows the pin assignments for the MSP53C691. Table 1–1 pro-

vides pin functional descriptions.

Figure 1–1.MSP53C691 Pin Assignments

1718 19

VSS

DACP

VDD

DACM

VDD

PD4

PD5

PD6

PD7

DATA0

DATA1

DATA2

DATA3

DATA/COMMAND (DATA4)

DATA5

DATA6

VDD

R/W

STROBE

OUTRDY

INRDY

TEST

SCANOUT

SYNC

SCANCLK

SCANIN

RESET

PLL

OSCIN

OSCOUT

VSS 21 22 23 24

63 62 61 60 5964 58

56 55 5457

25 26 27 28 29

53 52

51 50 49

30 31 32

DATA7

MSP53C691

PM PACKAGE

(TOP VIEW)

VDD

VSS

NC – No internal connection

NOTE: Pin 35 is DATA4 in 8-bit mode, or DATA/COMMAND in 4-bit mode.

Table 1–1.MSP53C691 Signal Description

NAME PIN

NO. PAD

NO. I/O DESCRIPTION

INRDY 6 6 O An output signal from the slave to the microcontroller. A low signal

indicates that the MSP53C691 is ready to accept data or

command. A high signal indicates that the MSP53C691 is busy

and the microcontroller must not write any data or command to it.

OUTRDY 5 5 O An output signal from the slave to the microcontroller. A low signal

indicates that the MSP53C691 is ready to send data or command

to the microcontroller.

STROBE 4 4 I An input signal to the slave from the microcontroller. STROBE

sequences read or write operations in conjunction with the R/W

signal. This signal is pulsed high-low-high for read or write

operations sequencing.

R/W 3 3 I An input signal to the slave from the microcontroller. Read/write

select signal which is set high for read operations or set low for

write operations by the microcontroller.

Inhaltsverzeichnis

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Kawai

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neutral labs

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