SI2493-D-FS Silicon Laboratories Inc, SI2493-D-FS Datasheet - Page 58

• Manufacturer Part Number: SI2493-D-FS
• Description: IC ISOMODEM SYSTEM-SIDE 16SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-D-FS

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AN93
The modem has a 48-character buffer, which makes it possible to enter multiple AT commands on a single line.
The multiple commands can be separated with spaces or linefeed characters to improve readability. AT, space and
linefeed characters are not loaded into the buffer and are not included in the 48-character count. The command
line must end with carriage return for the modem to begin executing it. The modem ignores command lines longer
than 48 characters and reports ERROR. Table 37 shows examples of multiple AT commands on a single line.
When concatenating commands on the same line, the following must also be taken in to account:





58
A semicolon is used to append to :U or :R commands. For example, AT:U42,0022;:R43;S6=4.
The command +IPR cannot be on the same line as a :U or :R command.
The commands *Y, :W, :P, +MS and +MR cannot be appended to. They must be the last command in a string.
The command AT+GCI=9 must be on a line of its own.
Consecutive U registers can be written in a single command as AT:Uhh,xxxx,yyyy,zzzz where hh is the first U-
register address in the three register consecutive series. This command writes a value of xxxx to Uhh, yyyy to
Uhh+1, and zzzz to Uhh+2. Additional consecutive values may be written up to the 48 character limit.
Command
AT S0=4 M1 X1 <CR>
Table 37. Multiple AT Commands on a Single Line
ATS0=4M1X1<CR>
AT:R2C
ATS2?
AT&$
AT$
ATS0=4<CR>
ATM1<CR>
ATX1<CR>
Command
Table 36. Command Examples
&G = 017
&D = 001
&H = 000
&P = 000
(Si2457)
M = 000
Q = 000
E = 001
V = 001
X = 004
Y = 000
Result
00A0
043
Rev. 1.3
The modem auto-answers on the
fourth ring. The speaker is on during
dial and handshake only. Blind dial-
ing is enabled.
Same as above (spaces do not mat-
ter).
Same as above.
Configuration status of basic
AT commands.
Configuration of &AT
commands.
S-register 2 value—Escape
code character (+).
Value stored in register U2C.
Result
Comment