W681307 Datasheet, PDF (6/160 Pages) Winbond – USB1.1 CODEC Microprocessor Control Unit with 32KB Mask ROM and 4KB RAM

W681307
12.3.12 ToneEna0..................................................................................................................... - 84 -
12.3.13 SideTone...................................................................................................................... - 85 -
12.3.14 Loopback_EN .............................................................................................................. - 85 -
12.3.15 Specified Register ........................................................................................................ - 85 -
12.3.16 Connect1 ~ ToneEna1 .................................................................................................. - 85 -
12.3.17 Connect2 ~ ToneEna2 .................................................................................................. - 85 -
12.3.18 SideToneChannel_Ena................................................................................................. - 86 -
12.3.19 Connect3 ~ ToneEna3 .................................................................................................. - 86 -
12.4 PCM Mixer Matrix ........................................................................................................... - 86 -
12.5 Gain Tables ...................................................................................................................... - 86 -
13. ECHO CANCELLER ............................................................................................................ - 89 -
13.1 Half AEC Block Diagram ................................................................................................. - 89 -
13.1.1
Acoustics Suppression ................................................................................................. - 89 -
13.1.2
Network Power Estimation.......................................................................................... - 90 -
13.1.3
Acoustic Power Estimation .......................................................................................... - 90 -
13.1.4
Auto Gain Control ....................................................................................................... - 91 -
13.2 The Software Interface of Speech Processor...................................................................... - 91 -
13.3 Activation Registers ......................................................................................................... - 91 -
13.3.1
UP_CONFIG................................................................................................................ - 91 -
13.3.2
UP_RESET................................................................................................................... - 92 -
13.3.3
EC_BELTA .................................................................................................................. - 92 -
13.3.4
Specific Register........................................................................................................... - 92 -
13.4 Performance Adjustment Registers .................................................................................. - 92 -
13.4.1
Acoustic Suppressor Register ...................................................................................... - 92 -
13.4.2
Acoustic Side Control Registers ................................................................................... - 93 -
13.4.3
Network Side Control Registers................................................................................... - 95 -
13.4.4
ACOUSTIC / NETWORK Active Status ...................................................................... - 98 -
13.4.5
AGC Control Registers ................................................................................................ - 98 -
13.4.6
Noise Suppressor Registers........................................................................................ - 100 -
13.4.7
AEC Soft Clip ............................................................................................................ - 101 -
13.5 Acoustic Side / Network Side Power Measurement....................................................... - 106 -
13.5.1
ACOUSTIC_SHORT_TERM_POWER ....................................................................... - 106 -
13.5.2
ACOUSTIC_LONG_TERM_POWER ......................................................................... - 106 -
13.5.3
ACOUSTIC_POWER_DEVIATION........................................................................... - 107 -
13.5.4
ACOUSTIC / NETWORK Active Status .................................................................... - 107 -
13.5.5
NETWORK_SHORT_TERM_POWER ....................................................................... - 107 -
13.5.6
NETWORK_LONG_TERM_POWER ......................................................................... - 108 -
13.5.7
NETWORK_POWER_DEVIATION........................................................................... - 108 -
13.5.8
ACOUSTIC / NETWORK Active Status .................................................................... - 108 -
14. SYSTEM FUNCTION.......................................................................................................... - 109 -
14.1 Power On Reset.............................................................................................................. - 109 -
14.1.1
CODEC On/Off Scheme............................................................................................ - 109 -
14.1.2
CODEC Digital Part................................................................................................... - 110 -
-6-
Publication Release Date: May, 2007
Revision 1.3