SI3015-FS Silicon Laboratories Inc, SI3015-FS Datasheet - Page 33

• Manufacturer Part Number: SI3015-FS
• Description: SI2400 ISOMODEM LINE-SIDE
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3015-FS

• Data Format: V.90
• Interface: Serial
• Voltage - Supply: 3.3 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Baud Rates: -

take advantage of the !7 protocol directly instead of
using the !3 to !6 entry points.
A0
Answer and transmit the AIN analog input signal on the
telephone line and connect the phone line receive
signal to the AOUT pin (See Figure 10B). This mode
monitors for DTMF received signals and user defined
tones. Any received character is echoed. User-defined
tones are echoed as X and Y. Transmission of any data
to the Si2400 UART will cause the modem to go into the
command mode. The modem can then send DTMF
tones via the “ATDT #!0” command (where # represents
a DTMF character 0-9, A-D, # or*) or be disconnected
with the “ATH” command. The “ATDT #!0” command
string does not initiate a new call since the modem is
already connected. DRT must be set to data mode
(SE4[5:4](DRT) = 00b) before attempting to send tones
after a “A0” command. User defined tones are enabled
by setting S14[6] (UDF) = 1b and require DSP low-level
control as defined on page 40. The online mode can be
resumed by issuing the “ATO” command.
A1
Answers a call and follows the “SIA Format” protocol for
Alarm System Communications at 300 bps (see !2).
!0
After dialing the number, go into DTMF monitor mode
with no modem connection. After dialing is complete,
the “!0” mode is the same as A0 described above.
!1
Command
Table 19. AT Command Set Extensions
A0
A1
X1
X2
X3
!0
!1
!2
!7
Function
Answer and switch to DTMF monitor
mode
Answer and switch to “SIA Format”
Dial and switch to DTMF monitor
mode
Dial and switch to DTMF security
mode
Dial and switch to “SIA Format”
Dial and switch to pulse security mode
SIA half-duplex mode search
SIA half-duplex return online as
transmitter
SIA half-duplex return online as
receiver
for Alarm Industry
Rev. 1.1
Dial number and follow the DTMF security protocol.
The format for this command is as follows:
ATDT<phone number>!1<message 1><CR>
K
!<message 2><CR>
K
!<message 3><CR>
K
.
.
.
K
!<message n><CR>
The modem dials the phone number and echoes “r”
(ring), “b” (busy), and “c” (connect) as appropriate. “c”
echoes only after the Si2400 detects the Handshake
Tone. After a 250 msec delay, the modem sends the
DTMF tones containing the first message data and
listens for a Kissoff Tone. If the Kissoff Tone is shorter
than or equal to the value stored in S36(KTL)
(default = 1 second) is detected, the Si2400 echoes a
“K”. A “k” is echoed if the length of the Kissoff Tone is
longer than the S36(KTL) value. The controller can then
send the next message. All messages must be
preceded by a “!” and followed by a <CR> and received
by the Si2400 within 250 msec after the “K” is echoed.
Setting S0C[0] (MCH) = 1b causes a “.” to be echoed
when the DTMF tone is turned on and a “/” character to
be echoed when the DTMF tone is turned off. This can
help the host monitor the status of the message being
sent. The previous message can be resent if the host
responds with a “~” after the Si2400 echoes a “K”. Any
character other than a “!” or a “~” sent to the modem
immediately after the “K” will cause the modem to
escape to the command mode and remain off-hook. Any
character except “!” and “~” sent during the transmission
of a message will cause the message to be aborted and
the modem to return to the command mode.
If the Kissoff Tone is not received within 1.25 seconds,
the modem will echo a “^”. A “~” from the host will cause
the last message to be resent. Any character other than
a “!” or a “~” sent to the modem immediately after the “^”
will cause the modem to escape to the command mode
and remain off-hook.
!2
Dial number and follow the “SIA Format” protocol for
Alarm System Communications.
The modem dials the phone number and echoes “r”
(ring), “b” (busy), and “c” (connect) as appropriate. “c”
Si2400
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