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.
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