RC224ATL View Datasheet(PDF) - Conexant Systems
Part Name
Description
MFG CO.
'RC224ATL' PDF : 104 Pages View PDF
5.0 S Registers
RC224ATL/224ATLV
EmbeddedModem Family
Table 5-2. S Register Description (4 of 8)
Register
S21
Default
00
Range
Bit Mapped
Units
—
Description
Bit Mapped Options. S21 is the modem register with the following
bit functions:
Bit 0 Telco Jack (See &J Command)
0
&J0—11/RJ-45S (factory default)
1
&J1—RJ-12/RJ-13
Bit 1 Reserved
Bit 2 Ready to Send (RTS)/Clear to Send (CTS). (See &R
Command)
0
&R0—CTS tracks RTS (not supported)
1
&R1—RTS is ignored (factory default)
Bit 3, 4 Data Terminal Ready (DTR) (See &D Command)
43
0 0 &D0—Modem ignores DTR (factory default)
0 1 &D1—Modem goes to command state if
ON-to-OFF transition on DTR
1 0 &D2–Modem “hangs up” if ON-to-OFF
transition on DTR
1 1 &D3—Modem goes to initialization state if
ON-to-OFF transition on DTR
Bit 5 Data Carrier Detect (DCD) (See &C Command)
0
&C0—DCD is always on (factory default)
1
&C1—An ON condition on DCD indicates the
presence of a valid data carrier
Bit 6 Data Set Ready (DSR) (See &S Command)
0
&S0—DSR is always on
1
&S1—DSR is turned on at the start of
handshaking
Bit 7 Long Space Disconnect (See Y Command)
0
&Y0—Disabled (factory default)
1
&Y1—Enabled
5-6
Conexant
D224ATLVDSC
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