SI3015-F-FS Silicon Laboratories Inc, SI3015-F-FS Datasheet - Page 36

• Manufacturer Part Number: SI3015-F-FS
• Description: IC ISOMODEM LINE-SIDE 16SOIC
• Manufacturer: Silicon Laboratories Inc
• Type: Chipsetr

Specifications of SI3015-F-FS

• Package / Case: 16-SOIC (3.9mm Width)
• Data Format: V.90
• Interface: Serial
• Voltage - Supply: 3.3 V ~ 5 V
• Mounting Type: Surface Mount
• Product: Modem Chip
• Supply Voltage (min): 3 V
• Supply Current: 26 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Baud Rates: -
• Lead Free Status / Rohs Status: Compliant

Si2400
6.5.7. Intermessage Timing
Intermessage timing is accomplished in three ways,
relative to the end of the previous message (“,” result
code), relative to the Kissoff Tone (“K” result code) or
relative to the Kissoff timeout (“^” result code).
If the intermessage timing is relative to the end of the
previous message (S36[3:2] [IDKT] = 10
intermessage timer begins with the “,” result code. The
Si2400 sends an “N” to mark the time in which the
intermessage timer has timed out. If another message
is received prior to the “N”, the Si2400 keeps the
message and sends it to the receiver at the time the “N”
is sent.
If a message is not received within the time frame
defined by “,” and “N”, the Si2400 sends nothing, waits
for the next message and transmits the message as
soon as the host sends the message. This message
may not be accepted by the alarm receiver.
If the intermessage timing is relative to the end of the
Kissoff Tone, the timing begins when the “K” result code
is sent. In the event a kissoff tone was not detected, the
intermessage timing begins when the “^” is sent.
36
Before give up on
S39 (CDT)
handshake
S38[4:2] (HMT)
Handshake
Tone
m in.
S38[7] (DBD)
f = S38[1:0] (HF)
S36[1:0] (IT) = 1Xb
Digit
1st
S36[1:0] (IT) = 0Xb
f = S38[6:5] (DCF)
Interdigit
Figure 12. !7 Security Timing
Interdigit
b
or 11
b
), the
Digit
Last
Rev. 1.3
S36[3:2] (IDKT)
Before Indicating lack
of Kissoff
Interm essage from end of previous
m essage to start of next m essage
6.5.8. Returning to Command Mode
To return to command mode, the host sends any
character except the “~” and “!” characters. The
example here uses a <CR> to escape.
Once in command mode, all of the AT commands are
available.
ATH<CR>
!7xxx<CR> Sends the message xxx without dialing.
X1
Search for positive and negative acknowledge tones in
SIA half-duplex 300 bps mode. The Si2400 will respond
with “P” when a positive acknowledge is detected and
“N” when a negative acknowledge is detected.
X2
Return to online mode in SIA half-duplex mode as
transmitter.
X3
Return to online mode in SIA half-duplex mode as
receiver.
S36[3:2] (IDKT) =
S38[4:2] (HMT)
Kissoff
Tone
m in.
1Xb
Is used to hang up the line. Note that it is
the responsibility of the host to hang up the
line.
The message is sent as soon as the
Si2400 receives the <CR>. After this
message, it is again possible to send
subsequent messages using the “~” and “!”
commands shown above.
Intradigit Tim ing
Pulse On = S36[5:4] (PON)
Pulse Off = S36[7:6] (POF)
Pulse freq = S38[6:5] (DCF)
S36[3:2] (IDKT) = 0Xb Interm essage
From end of Kissoff Tone
Digit
1st
2nd Message
Digit
Last