SI2493-D-FS Silicon Laboratories Inc, SI2493-D-FS Datasheet - Page 199

• Manufacturer Part Number: SI2493-D-FS
• Description: IC ISOMODEM SYSTEM-SIDE 16SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-D-FS

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

7.5.7. Terminate
Upon detection of the Handset Lowered Event, the host should issue the commands in Table 124 to transition to
the TAM Hands-Free mode.
Commands / Data
Host to Modem
AT:U199&FFF7
AT:U72,05D7
AT:U72,065E
AT:U72,075E
AT:U72,0108
AT:U72,0900
AT+VLS=14
AT+VSP=0
AT+VLS=0
AT:U199|A
AT:U0B1,0
AT:U0B5,0
Table 124. Handset to TAM Hands-Free Transition
Modem to Host Result
Codes/Data
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Rev. 1.3
Mute the microphone and speaker paths to the codec.
Select handset voice path. See Figure 29 on page 188 for details.
+VSP must be zero when exiting from +VLS=13.
Disable voice mode. Used as a transition point between
non-zero +VLS voice modes.
Setup on-hook voice mode. See
details. This will return the modem to on-hook state.
Disable Si3000-to-DAA transmit gain path. This ensures
codec tones are not sent to the FDV and DTMF.
Disable DAA-to-Si3000 receive gain path. This ensures line
events such as CID and ring are not heard via the codec.
Configure Si3000 Register 1:
Disable speaker driver
Enable line output driver
Disable telephone instrument driver
Disable MBIAS output
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
Configure Si3000 Register 6:
0 dB RX PGA gain
Enable Line Out
Disable telephone instrument output
Configure Si3000 Register 7:
0 dB RX PGA gain
Enable SPKRL
Mute SPKRR
Configure Si3000 Register 9:
0 dB Line Out attenuation
0 dB Speaker output attenuation
Enable speaker for local ring tone/alert tones.
Local Modem Actions
Table 117 on page 190 for
AN93
199