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ST75C540 Datasheet(PDF) 30 Page - STMicroelectronics

Part # ST75C540
Description  SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
PDF  84 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST75C540 Datasheet(HTML) 30 Page - STMicroelectronics

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Parameters When the CONF_OPER is set to F, selecting the Modem Mode of operation, the parameters
have the following meaning :
Field
Byte
Pos.
Value
Definition
CONF_OPER
1
3..0
1111
Select Modem Mode
CONF_ANAL
1
4
0
1
Normal mode
Analog loop back (test mode only)
CONF_PSTN
1
5
0
1
PSTN (carrier detect set to -43/-48dBm)
Leased line (carrier detect -33/-38dBm)
CONF_AO
1
6
0
1
Answer mode
Originate mode
CONF_DTINIT
(only in tone mode)
170
1
Global init of secondary tone detector
Partial init of secondary tone detector
(8)
CONF_MODE
2
5..0
0
1
2
3
4
5
6
7
8
9
A
B
C
D
Other
Automode (V.32bis/V.32/V.22bis/V.22)
(9)
Bell 103 (full duplex)
Bell 212A (full duplex)
(9)
V.21 (full duplex)
V.23 (full duplex)
V.22 (full duplex)
(9)
V.22bis (full duplex)
(9)
V.27ter
V.29
V.17
V.32 (full duplex)
(9)
V.32bis (full duplex)
(9)
V.33 (half duplex)
V.21 channel 2
Reserved
CONF_TXEQ
2
7..6
0
1
2
3
No transmit equalizer
Transmit equalizer #1
Transmit equalizer #2
Transmit equalizer #3 (V.17/V.33/V.29/V.27ter)
CONF_CAR
3
0
0
1
1800Hz carrier (V.17/V.33 only)
1700Hz carrier (V.17/V.33 only)
CONF_TCM
3
1
0
1
Treillis coding not allowed (V.32 only)
Treillis coding allowed (V.32bis, V.32)
CONF_SP0
3
7..4
xxx1
xx1x
x1xx
1xxx
1200bps allowed (V.22, V.22bis)
(10)
2400bps allowed (V.22bis, V.27)
(10)
4800bps allowed (V.32bis, V.32, V.27, V.29)
(10)
7200bps allowed (V.32bis, V.29, V.17)
(10)
CONF_SP1
4
2..0
xx1
x1x
1xx
9600bps allowed (V.32bis, V.32, V.29, V.17)
(10)
12000bps allowed (V.32bis, V.17, V.33)
(10)
14400bps allowed (V.32bis, V.17, V.33)
(10)
Notes :
8.
With conf 80 00 00 00 the coefficients of secondary tone detectors are not initialized.
9.
ST75C540 only.
10.
V.22bis, V.22, V.32bis and V.32 modes ST75C540 only.
VII - COMMAND SET DESCRIPTION (continued)
ST75C530 - ST75C540
30/84



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