GENERAL-PURPOSE TONE DECODING AND DTMF DETECTION (CONTAINS SCANNED TEXT)

This report describes a single-chip solution for concurrent DTMF and general-tone decoding or expanded, general-tone decoding only. These facilities are provided on a special program on the TMS320C17 or TMS320E17. The term TMS320C17 applies to

both throughout the report.

The report covers the following topics:

- Theory of Operation

- Software

- TMS320C17 Features

- Hardware

- Implementation

- Software Implementation

- Utilization of TMS320C17 Resources

- Hardware Implementation

- Host Interface

- Host Write Cycle

- Host Access Considerations

- Host Interface Registers

- Register Read Functions

- Applications and Customization

- Secure Off-Site Control

- Call Monitoring

- DTMF Telephone Tester

- Customization for User Applications

- Flexibility through Programmability

- Conclusions and References

The report also includes the following appendixes:

- Appendix A Tone Detector Source Code

- Appendix B PC Application Program

- Appendix C Power Detector Operational Considerations

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.

(c) Copyright 1998 Texas Instruments Incorporated. All rights reserved.
Trademarks, Important Notice!