SI2457-D-FT Silicon Laboratories Inc, SI2457-D-FT Datasheet - Page 218

• Manufacturer Part Number: SI2457-D-FT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2457-D-FT

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

AN93
218
Commands / Data
Host to Modem
AT*Y254:W59|1
AT+FCLASS=8
[Dial Number]
AT:U72,065E
AT:U72,075E
AT:U72,0108
AT:U72,0597
AT:U72,0900
AT:UB1,xxxx
AT:UB5,xxxx
AT+VLS=13
AT+VSP=1
AT:U199|4
ATZ
Table 135. AEC Gain Calibration – Dial Remote Telephone
Modem to Host Result
Codes/Data
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Rev. 1.3
Reset the modem.
Enter voice mode.
Set SPCAL (U199 [2]) to enable calibration.
Enable the SSI interface to the Si3000.
Configure Si3000 Register 1:
Disable speaker driver
Enable line output driver
Disable telephone instrument driver
Disable MBIAS output
Configure Si3000 Register 5:
10 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
Use calibrated value from “Transmit Gain Calibration –
Speakerphone Disabled” section.
Use calibrated value from “Receive Gain Calibration –
Speakerphone Disabled” section.
Setup off-hook voice mode. See Table 122 on page 198
for details. This command will switch the modem to off-
hook state.
Enable speakerphone voice path. See Table 136 for
details.
Local Modem Actions