CT8022 Datasheet, PDF (4/194 Pages) List of Unclassifed Manufacturers – VOIP/VON G.723.1, G279AB TRUESPEECH CO-PROCESSOR

TrueSpeech® Co-Processor
PRELIMINARY/CONFIDENTIAL
Version: 1.18
Table of Contents
1 PINOUT AND PIN DESCRIPTIONS ............................................................................................................. 10
2 EXTERNAL COMPONENT CONNECTIONS............................................................................................. 15
2.1 PLL CIRCUIT ............................................................................................................................................... 15
2.2 EXTERNAL SRAM CT8022 CONNECTION ................................................................................................... 16
2.2.1 CT8022 8-Bit External Data Only SRAM Connection ....................................................................... 16
2.2.2 CT8022 16-Bit Combined Program-Data (Download) SRAM Connection ........................................ 17
2.3 CODEC CONNECTION ................................................................................................................................. 18
3 FEATURE OVERVIEW .................................................................................................................................. 19
3.1 INTRODUCTION ............................................................................................................................................ 19
3.2 SPEECH MODES............................................................................................................................................ 19
3.3 TRUESPEECH ............................................................................................................................................... 20
3.4 TRUESPEECH 8.5.......................................................................................................................................... 20
3.5 TRUESPEECH 6.3 (G.723.1) ......................................................................................................................... 20
3.6 TRUESPEECH 5.3 (G.723.1) ......................................................................................................................... 21
3.7 TRUESPEECH 4.8.......................................................................................................................................... 21
3.8 TRUESPEECH 4.1.......................................................................................................................................... 21
3.9 G.711 µ-LAW/A-LAW................................................................................................................................... 21
3.10 G.729 ANNEX A DOWNLOADABLE .............................................................................................................. 21
3.11 G.722 DOWNLOADABLE .............................................................................................................................. 21
3.12 AUTOMATIC GAIN CONTROL........................................................................................................................ 21
3.13 RECORD AND PLAYBACK VOLUME .............................................................................................................. 22
3.14 DSVD.......................................................................................................................................................... 22
3.15 MICROSOFT WINDOWS^ SOUND SYSTEM..................................................................................................... 22
3.16 DATA COMPRESSION/DE-COMPRESSION ACCELERATOR.............................................................................. 22
3.17 DTMF/TONE GENERATOR........................................................................................................................... 22
3.18 TONE DETECTION ........................................................................................................................................ 23
3.19 DTMF DETECTION ...................................................................................................................................... 23
3.20 FULL DUPLEX SPEAKERPHONE..................................................................................................................... 23
3.21 ACOUSTICAL ECHO CANCELLATION............................................................................................................. 23
3.22 8/16-BIT HOST CONTROLLER INTERFACE..................................................................................................... 24
3.23 CODEC INTERFACE .................................................................................................................................... 24
3.24 CT8022 CRYSTAL........................................................................................................................................ 24
3.25 POWER SAVE MODES................................................................................................................................... 24
4 HOST CONTROLLER INTERFACE ............................................................................................................ 25
4.1 8 OR 16-BIT HOST CONTROLLER INTERFACE............................................................................................... 25
4.2 HOST INTERFACE SIGNALS........................................................................................................................... 25
4.3 CT8022 HOST CONNECTION WITH EXTERNAL DMA CONTROLLER............................................................ 26
4.4 HOST PROGRAMMERS MODEL ..................................................................................................................... 27
4.5 REGISTER DESCRIPTIONS ............................................................................................................................. 28
4.5.1 Hardware Control Register.................................................................................................................. 28
4.5.2 Hardware Status Register .................................................................................................................... 30
4.5.3 Software Control Register ................................................................................................................... 31
4.5.4 Software Status Register...................................................................................................................... 31
4.5.5 Host Receive and Transmit Data Buffer Blocks.................................................................................. 32
4.6 DMA TRANSFERS ........................................................................................................................................ 36
4.6.1 DMA modes ........................................................................................................................................ 36
4.6.2 Burst Mode and Single Cycle Mode Transfers.................................................................................... 37
4.6.3 Flow-Through DMA Transfers ........................................................................................................... 39
4
DSP GROUP, INC., 3120 SCOTT BOULEVARD
CT8022A11AQC FW Revision 0118
SANTA CLARA, CA 95054 PH: 408 986 – 4300 FAX: 408 986 – 4490
All specifications are subject to change without prior notice.