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ST75C520 数据表(PDF) 19 Page - STMicroelectronics

部件名 ST75C520
功能描述  HIGH SPEED FAX MODEM DATA PUMP
PDF  45 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST75C520 数据表(HTML) 19 Page - STMicroelectronics

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CONF
Configure for Operations
CONF
Opcode
20
00100000
Synopsis
CONF allows the complete definition of the ST75C520 operation, including the mode of
operation (tone, FAX transmit, FAX receive, voice transmit, voice receive, DTMF receive, ...)
and the modem parameters (standard, speed, ...).
Parameters
Field
Byte
Pos.
Value
Definition
CONF_OPER
1
3..0
-
Mode of operation, see below
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 (FSK full duplex only)
Originate mode (FSK full duplex only)
CONF_V24
1
7
0
1
Do not use RTS pin signal
Use RTS pin signal
CONF_MODE
2
5..0
1
3
4
7
8
9
C
D
Other
Bell 103 (full duplex)
V.21 (full duplex)
V.23 (full duplex)
V.27ter
V.29
V.17
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
CONF_CAR
3
0
0
1
1800Hz carrier (V.17/V.33 only)
1700Hz carrier (V.17/V.33 only)
CONF_SP0
3
7..5
xx1
x1x
1xx
2400bps allowed (V.27)
4800bps allowed (V.27, V.29)
7200bps allowed (V.29, V.17)
CONF_SP1
4
2..0
xx1
x1x
1xx
9600bps allowed (V.29, V.17)
12000bps allowed (V.17, V.33)
14400bps allowed (V.17, V.33)
According with the 4 first bits of the CONF_OPER the ST75C520 is put into the following
mode of operation.
CONF_OPER
Transmit
Received
0000*
Tones
Tones
0010
Voice
Tones
0100
Tone
DTMF
0110
Voice
DTMF
1000
Tones
Voice
1010
Voice
Voice
1111
Modem
Modem
Other
Not allowed
Not allowed
ST75C520
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