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ST75C540 数据表(PDF) 31 Page - STMicroelectronics

部件名 ST75C540
功能描述  SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
PDF  84 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST75C540 数据表(HTML) 31 Page - STMicroelectronics

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Parameters CODER and DECODER Modes
In the VOCODER Modes, either CODER or DECODER, (CONF_OPER equals 2 or 8) the
parameters have the following meaning :
Field
Byte
Pos.
Value
Definition
CONF_OPER
1
3..0
-
Define mode : see table above
CONF_CODE
3
0
0
1
Low bit rate coded
ADPCM coded
CONF_VPF
3
1
0
1
Decoder post filter off
Decoder post filter on (not in ADPCM)
CONF_VASP
3
3..2
00
01
10
11
ADPCM 32000 bps
ADPCM 24000 bps
ADPCM 16000 bps
Reserved
CONF_EC
3
4
0
1
Line echo canceller disabled
Line echo canceller enabled
CONF_SRC
3
5
0
1
Coder source is line input
Coder source is audio input
CONF_SUPSIL
3
6
0
1
Coder silence supressor disabled
Coder silence supressor enabled
CONF_ERCOR
3
7
0
1
Low bit rate decoder disable error correction
Low bit rate decoder enable error correction
Parameters ROOM-MONITOR Mode
In the ROOM MONITOR Mode (CONF_OPER equals 9) the parameters have the following
meaning :
Field
Byte
Pos.
Value
Definition
CONF_OPER
1
3..0
1001
Define ROOM-MONITOR mode
CONF_EC
3
4
0
1
Line echo canceller disabled
Line echo canceller enabled
Parameters HANDSET/HANDSFREE Mode
In the HANDSET/HANDSFREE mode (CONF_OPER equals C), the parameters have the
following meaning :
Field
Byte
Pos.
Value
Definition
CONF_OPER
1
3..0
1100
Define HANDSET/HANDSFREE mode
CONF_INHINI
3
6
0
1
Init all telephony parameters
Disable init of telephony parameters
CONF_HFREE
3
7
0
1
Handset mode
Handsfree mode
CONF_LEC
4
0
0
1
Line echo canceller enabled
Line echo canceller disabled
CONF_AEC
4
1
0
1
Audio echo canceller enabled
Audio echo canceller disabled
CONF_FULLD
4
2
0
1
Full duplex mode enabled
Half duplex mode enabled
CONF_SOFTRx
4
3
0
1
Softclipping enabled on Rx
Softclipping disabled on Tx
CONF_AGC
4
4
0
1
AGC active
AGC frozen
CONF_SOFTTx
4
5
0
1
Softclipping enabled on Tx
Softclipping disabled on Rx
VII - COMMAND SET DESCRIPTION (continued)
ST75C530 - ST75C540
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