SI2457-D-FT Silicon Laboratories Inc, SI2457-D-FT Datasheet - Page 205
SI2457-D-FT
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
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AT:U0B1,0
AT:U199|A
<DLE><!>
AT+VRX
Table 129. TAM Handset Record OGM (Continued)
[Voice Stream]
<DLE><ETX>
Rev. 1.3
CONNECT
OK
OK
OK
OK
OK
OK
OK
Trigger receive operation. The first byte
after the newline character following the
CONNECT message will be the first data
stream byte.
Receive OGM voice stream. During voice
stream capture, the user can adjust the
UC0 value via the <DLE><u> and
<DLE><d> commands. The host voice
driver will need track the number of adjust-
ments and update the +VGR value for
future use.
Terminate the receive operation. The
modem will respond with <DLE><ETX> to
mark the end of the data stream. The OK
denotes the return to command mode. A
Handset Lowered Event, timeout, or silence
event can trigger the <DLE><!> transmis-
sion.
Disable Si3000-to-DAA transmit gain path.
This ensures codec tones are not sent to
the FDV and DTMF.
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
AN93
205
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