SI2493-C-GT Silicon Laboratories Inc, SI2493-C-GT Datasheet - Page 48

• Manufacturer Part Number: SI2493-C-GT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-C-GT

• Mfg Application Notes: SI2493/57/34/15/04, Appl Note AN93
• Data Format: V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, Bell 212A
• Baud Rates: 56k
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN93
48
Notes:
Command
1. When in autobaud mode, \B0, \B1, and \P1 is not detected automatically. The combination of \B2 and \P3 is detected.
2. When changing rates, the result code “OK” is sent at the old DTE rate. Subsequent commands must be sent at the new
3. The autobaud feature does not detect this rate.
4. Default is \T16 (autobaud); otherwise, \T9 (19.2 kbps) if a pulldown is connected to pin 18 (24-pin device only).
\T10
\T12
\T13
\T14
\T11
\Qn
\Q0
\Q2
\Q3
\Q4
\P3
\Tn
\T0
\T1
\T2
\T3
\T4
\T5
\T6
\T7
\T8
\T9
This is compatible with seven data bits, no parity, two stop bits. Seven data bits, no parity, one stop bit may be forced by
sending AT\T17\B1.
rate. When the Si2493/57/34/15/04 is configured in autobaud mode, \T0 through \T15 lock the new baud rate and
disable autobaud. To eliminate any possibility of a race condition between the receipt of the result code and the
changing of the UART speed, CTS is de-asserted while the result code is being sent until after the rate has been
successfully changed. The host should send the \T command and wait for the “OK” response. After the “OK” has been
received, the host may send data at the new rate as soon as CTS is asserted. The \T command should be the last
command sent in a multi-command line and may not be used on the same command line as :U or :R commands. If it is
not, the “OK” from the \T command is sent at the old DTE rate, and any other result codes are sent at the new DTE rate.
Mark.
Modem-to-DTE flow control.
Disable all flow control—This may only be used if the DTE speed and the line (DCE) speed are guar-
anteed to match throughout the call.
Use CTS only.
Use RTS/CTS.
Enable XON/XOFF flow control for modem-to-DTE interface. Does not enable modem-to-modem
flow control.
DTE rate
300 bps
600 bps
1200 bps
2400 bps
4800 bps
7200 bps
9600 bps
12.0 kbps
14.4 kbps.
19.2 kbps
38.4 kbps
57.6 kbps
115.2 kbps
230.4 kbps
245.760 kbps
2
3
4
3
Table 21. Extended AT\ Command Set (Continued)
Rev. 0.9
Action