SI2493-D-FS Silicon Laboratories Inc, SI2493-D-FS Datasheet - Page 200

• 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

AN93
7.5.8. Speakerphone Transition
In the Handset mode, the SP Button On Event will trigger the transition from Handset to Speakerphone mode. See
"7.7. Speakerphone" on page 212 for details on Speakerphone mode. The voice driver should track the handset
hook switch state, such that if the user exits Speakerphone mode, the system will switch back to Handset
configuration without losing the active call.
200
Commands / Data
Host to Modem
AT:U199&FFF5
AT:U72,05D7
AT:U72,065E
AT:U72,075E
AT:U72,0108
AT:U72,0900
AT+VSP=1
AT:U199|A
Table 125. Handset to Speakerphone Transition
Modem to Host Result
Codes/Data
OK
OK
OK
OK
OK
OK
OK
OK
Rev. 1.3
Mute the microphone and speaker paths to 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 speakerphone voice path. See Figure 29 on
page 188 for details.
Enable the microphone and speaker paths to the codec.
Local Modem Actions