DVSR CODEC

2

MX802

1998 MX-COM, Inc.

www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054

Doc. # 20480033.008

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies.

Contents

Section

Page

1

Block Diagram................................................................................................................ 3

2

Signal List....................................................................................................................... 4

3

External Components.................................................................................................... 6

4

General Description....................................................................................................... 7

4.1

Controlling Protocol ............................................................................................................. 8

4.1.1

Address/Commands............................................................................................................... 8

4.1.2

Operation with DRAM............................................................................................................. 8

4.1.3

Speech ................................................................................................................................... 9

4.1.4

Data Handling....................................................................................................................... 10

4.2

Write to Control Register ................................................................................................... 12

4.2.1

General Reset ...................................................................................................................... 12

4.2.2

Direct Access ....................................................................................................................... 12

4.2.3

Play Counter......................................................................................................................... 12

4.2.4

DRAM Control ...................................................................................................................... 12

4.2.5

Codec Powersave ................................................................................................................ 12

4.2.6

Command Interrupt Enable .................................................................................................. 12

4.2.7

Store and Play Speech Synchronization .............................................................................. 12

4.2.8

Decoder and Encoder Control.............................................................................................. 12

4.3

Encoder and Decoder Control : Analog Input and Output Control..................................... 14

4.3.1

Time Compression of Speech .............................................................................................. 15

4.4

Read Status Register ........................................................................................................ 15

4.4.1

Interrupts .............................................................................................................................. 15

4.4.2

Power Register ..................................................................................................................... 15

5

Application – Codec Performance ............................................................................. 17

6

Performance Specifications........................................................................................ 19

6.1

Electrical Specifications ..................................................................................................... 19

6.1.1

Absolute Maximum Limits ....................................................................................................19

6.1.2

Operating Limits ................................................................................................................... 19

6.1.3

Operating Characteristics..................................................................................................... 20

6.1.4

Timing................................................................................................................................... 21

6.2

Packages........................................................................................................................... 23

MXCOM, Inc. reserves the right to change specifications at any time without notice.