MT8920 查看數據表（PDF） - Mitel Networks

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MT8920

ISO-CMOS ST-BUS™ FAMILY ST-BUS Parallel Access Circuit

Mitel Networks 

MT8920B CMOS

Digital Signal Processor to ST-BUS Interface

Mode 2 allows many high speed devices to be easily

connected to the ST-BUS. Figure 12 shows a

TMS32020 digital signal processor interfaced to the

ST-BUS through the STPA. This simple interface

allows complex functions to be implemented in such

systems as PBX’s and computer systems. Some of

the possible functions include:

- Digital Filtering

- Voice Conferencing

- Speech/Data Compression

- Encryption

- Tone Detection and Generation

- Frequency Spectrum Analysis

- Image Processing

- µ-Law to A-Law Conversion

- Echo Cancellation

- Modulation

- Speech Synthesis and Recognition

TMS32020

DS

A9

A8

A7

A6

A8-A0

D7-D0

STRB

RW

MSC

READY

74HCT

138

E2

E1

A

B

C

MT8920B

CS

A5-A0

D7-D0

OE

WE

STo0

STi0

STo1

MMS MS1 24/32

+5V +5V

Figure 12 - ST-BUS to DSP Interface

3-16

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