Version: 1.18
PRELIMINARY/CONFIDENTIAL
TrueSpeech® Co-Processor
List of Figures
Figure 1-1: 128-Pin PQFP/LQFP............................................................................................................................. 10
Figure 2-1: PLL Circuit............................................................................................................................................ 15
Figure 2-2: External Data Only SRAM Connection................................................................................................. 16
Figure 2-3: External Combined Program-Data SRAM Connection ......................................................................... 17
Figure 2-4: CODEC Connection .............................................................................................................................. 18
Figure 4-1: CT8022 Connection to Host and External DMA Controller ................................................................. 26
Figure 4-2: Host Receive Data Buffer Block ........................................................................................................... 32
Figure 4-3: Host Transmit Data Buffer Block.......................................................................................................... 34
Figure 4-4: Single Cycle DMA Mode ...................................................................................................................... 37
Figure 4-5: Burst Mode DMA.................................................................................................................................. 38
Figure 4-6: Flow-Through DMA.............................................................................................................................. 39
Figure 5-1: CT8022 CODEC Interface Connection ................................................................................................. 40
Figure 9-1: AGC Attack Hold & Decay................................................................................................................... 89
Figure 9-2: CT8022 Internal Processing Activity..................................................................................................... 99
Figure 9-3: AEC and Speech Compression............................................................................................................ 101
Figure 9-4: Advanced AEC.................................................................................................................................... 107
Figure 9-5: Filter Mapping..................................................................................................................................... 134
Figure 9-6: Host-to-Host Operation ....................................................................................................................... 146
Figure A-1: SpeakerPhone – Digital Part................................................................................................................ 179
Figure A-2: SpeakerPhone – Acoustic and Analog Parts........................................................................................ 179
Figure B-1: CT8022s Connected via a Digital Link ............................................................................................... 184
Figure C-1: CT8022 Family EVB........................................................................................................................... 187
List of Tables
Table 9-1: Time Constant Table ............................................................................................................................. 92
Table 9-2: Default Filter Parameter Set Mapping Table....................................................................................... 135
Table 12-1: Absolute Maximum Ratings Over Specified Temperature Range ....................................................... 172
Table 12-2: Recommended Operating Conditions .................................................................................................. 172
Table 12-3: Electrical Characteristics Over Recommended Operating Free-Air Temperature Range (Unless
Otherwise Noted)................................................................................................................................. 173
Table 12-4: DTMF & Tone Generation Characteristics.......................................................................................... 173
Table 12-5: Acoustic Echo Canceller Performance ................................................................................................ 173
Table 12-6: Electrical Echo Canceller Performance ............................................................................................... 174
CT8022A11AQC FW Revision 0118 DSP GROUP, INC., 3120 SCOTT BOULEVARD
SANTA CLARA, CA 95054 PH: 408 986 – 4300 FAX: 408 986 – 4490
9
All specifications are subject to change without prior notice.
ETC [ ETC ]
