SI2457-C-GT Silicon Laboratories Inc, SI2457-C-GT Datasheet - Page 34

• Manufacturer Part Number: SI2457-C-GT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2457-C-GT

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

Si2457/34/15/04
34
Notes:
Command
1. When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be
2. The autobaud feature does not detect this rate.
\T10
\T11
\T12
\T13
\T14
\T15
\T16
\T17
\Q3
\Q4
\Tn
\T0
\T1
\T2
\T3
\T4
\T5
\T6
\T7
\T8
\T9
\U
detected. 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.
Table 13. Extended AT\ Command Set (Command Defaults in Bold) (Continued)
Use RTS/CTS
Use XON/XOFF flow control for modem-to-DTE interface. Does not enable modem-to-modem flow
control.
DTE rate—Change DTE rate. When the Si2457/34/15/04 is configured in autobaud mode (default),
\T0 through \T15 will lock the new baud rate and disable autobaud. On the 24-pin version, the ISO-
modem® is not in autobaud mode (pin 18 low on powerup), the result code “OK” is sent at the old
DTE rate. Subsequent commands must be sent at the new 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
307.200 kbps
Autobaud on
Autobaud off; lock at current baud rate.
Serial mode—causes a low pulse (25 ms) on RI and DCD. INT to be the inverse of ESC. RTS to be
inverse of CTS.
Parallel mode—causes a low pulse (25 ms) on INT.
This command terminates with a RESET.
2
2
Rev. 1.1
Action