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Rev. 1.4
7.5.7. Terminate
Upon detection of the Handset Lowered Event, the host should issue the commands in Table 138 to transition to
the TAM Hands-Free mode.
Table 138. Handset to TAM Hands-Free Transition
Host to Modem
Commands / Data
Modem to Host Result
Codes/Data
Local Modem Actions
AT:U199|A
OK
Mute the microphone and speaker paths to the codec.
AT+VSP=0
OK
Select handset voice path. See Figure 31 on page 200 for details.
+VSP must be zero when exiting from +VLS=13.
AT+VLS=0
OK
Disable voice mode. Used as a transition point between
non-zero +VLS voice modes.
AT+VLS=14
OK
Setup on-hook voice mode. See
Table 131 on page 202 for
details. This will return the modem to on-hook state.
AT:U0B1,0
OK
Disable Si3000-to-DAA transmit gain path. This ensures
codec tones are not sent to the FDV and DTMF.
AT:U0B5,0
OK
Disable DAA-to-Si3000 receive gain path. This ensures line
events such as CID and ring are not heard via the codec.
AT:U72,0108
OK
Configure Si3000 Register 1:
Disable speaker driver
Enable line output driver
Disable telephone instrument driver
Disable MBIAS output
AT:U72,05D7
OK
Configure Si3000 Register 5:
20 dB Line In gain
Enable Line In
20 dB MIC input gain
Mute MIC input
Mute telephone instrument input
Enable IIR filter
AT:U72,065E
OK
Configure Si3000 Register 6:
0 dB RX PGA gain
Enable Line Out
Disable telephone instrument output
AT:U72,075E
OK
Configure Si3000 Register 7:
0 dB RX PGA gain
Enable SPKRL
Mute SPKRR
AT:U72,0900
OK
Configure Si3000 Register 9:
0 dB Line Out attenuation
0 dB Speaker output attenuation
AT:U199&FFF7
OK
Enable speaker for local ring tone/alert tones.
Содержание Si2404
Страница 2: ...AN93 2 Rev 1 4 ...
Страница 27: ...AN93 Rev 1 4 27 Figure 7 Parallel Interface Read Timing Figure 8 Parallel Interface Write Timing ...
Страница 200: ...AN93 200 Rev 1 4 Figure 31 TAM Handset and Speakerphone Voice Paths ...
Страница 201: ...AN93 Rev 1 4 201 Figure 32 Si3000 Codec Gain and Signal Selection Options ...
Страница 290: ...AN93 290 Rev 1 4 Figure 57 256 Band Spectral Display Figure 58 2048 Band Spectral Display ...
Страница 305: ...AN93 Rev 1 4 305 Figure 76 Parallel or SPI Port Interrupt Service Flowchart ...