SI2404 SILABS [Silicon Laboratories], SI2404 Datasheet - Page 61

• Manufacturer Part Number: SI2404
• Description: V.90, V.34, V.32BIS, V.22BIS ISOMODEM WITH GLOBAL DAA
• Manufacturer: SILABS [Silicon Laboratories]

U7A GENA
Reset settings = 0x0000
*Note: When V22HD, HDLC, or FAST bits are set, \N0 (wire mode) must be used.
Name
15:8
Type
Bit
5:3
Bit
7
6
2
1
0
Reserved Read returns to zero.
Reserved Read returns to zero.
D15 D14 D13 D12 D11 D10
V22HD
Name
HDLC
FAST
DOP
ADD
Dial or Pulse.
0 = Normal ATDTW operation
1 = Use ATDTW for Pulse/Tone Dial Detection (see also ATDW command)
Adaptive Dialing
1 = Enable
0 = Disable
Attempt DTMF dial, then fall back to pulse dialing if unsuccessful. First digit is dialed as
DTMF. If a dialtone is still present after two seconds, the Si2457/34/15/04 will redial the first
digit and remaining digits as pulse. If a dialtone is not present after two seconds, the Si2457/
34/15/04 will dial the remaining digits as DTMF.
V.22bis Synchronous Mode.*
0 = Normal asynchronous mode.
1 = Transparent HDLC mode.
Synchronous Mode.*
0 = Normal asynchronous mode.
1 = Transparent HDLC mode.
Fast Connect.*
0 = Normal modem handshake timing per ITU/Bellcore standards.
1 = Fast connect modem handshake timing.
D9
Rev. 1.0
D8
DOP ADD
R/W R/W
D7
Function
D6
D5
Si2457/34/15/04
D4
D3
V22HD HDLC FAST
R/W
D2
R/W
D1
R/W
D0
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