r6781-12 Conexant Systems, Inc., r6781-12 Datasheet - Page 63

• Manufacturer Part Number: r6781-12
• Description: Embedded Modem Family
• Manufacturer: Conexant Systems, Inc.

EmbeddedModem Family
Table 5-2. S Register Description (7 of 8)
D224ATLVDSC
Register
S27
Default
40h
Bit Mapped
Range
Units
—
Conexant
Bit Mapped Options.
Bit 3, 1, 0Communications Mode Option (See &D Command)
Bit 2
Bit 4, 5 Synchronous Transmit Clock Source Selection (See &X
Bit 6
Bit 7
3 1 0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Dial Up/Leased Line Option
0
1
Command)
5 4
0 0
0 1
1 0
1 1
Communications Standard Option (See B Command)
0
1
Data/Fax Discrimination (i.e., AT+FAA Status)
0
1
&Q0 selected
default)
&Q1 selected
&Q2 selected
&Q3 selected
Reserved
Reserved
Reserved
Reserved
Dial Up (factory default)
Leased Line (not supported)
&X0
&X1
&X2
Reserved
B0
B1
Data/Fax auto answer mode disabled
(AT+FAA = 0)
Data/Fax auto answer mode enabled
(AT+FAA = 1)
—
—
—
—
—
CCITT V.22 bis/V.22
Bell 212A (factory default)
Internal Clock (factory default)
External DTE Clock (not supported)
Receive Clock (not supported)
Description
—
—
—
—
Asynchronous (factory
Synchronous (not supported)
Synchronous (not supported)
Synchronous (not supported)
5-9