SI2493-C-FS Silicon Laboratories Inc, SI2493-C-FS Datasheet - Page 67
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SI2493-C-FS
Manufacturer Part Number
SI2493-C-FS
Description
IC ISOMODEM SYSTEM-SIDE 16SOIC
Manufacturer
Silicon Laboratories Inc
Specifications of SI2493-C-FS
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
UART
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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S-Register
(Decimal)
10
12
14
24
30
38
40
Wait for dial tone delay timer. This timer starts when
Carrier loss timer—The time a remote modem carrier
must be lost before the Si2493/57/34/15/04 discon-
nects. Setting this timer to 255 disables the timer, and
the modem does not time out and disconnect. If S10 is
less than S9, even a momentary loss of carrier causes
a disconnect. Use for V.22bis and lower data rates.
Escape code guard timer—Minimum guard time
before and after “+++” to recognize a valid escape
sequence.
the “W” command is executed in the dial string.
Sleep Inactivity Time—This is the time the modem
operates in normal power mode with no activity on the
serial port, parallel port, or telephone line before enter-
ing the low-power sleep mode and waking on ring. The
modem remains in the normal power mode, regardless
of activity, if the timer is set to 0.
Disconnect Activity Timer—Sets the length of time that
the modem stays online before disconnecting with no
activity on the serial port, parallel port, or telephone
line (ring, hookswitch flash, or caller ID). This feature is
disabled if set to 0.
Hang Up Delay Time—Maximum delay between
receipt of the ATH0 command and hang up. If time out
occurs before all data can be sent, the NO CARRIER
(3) result code is sent. An OK response is sent if all
data is transmitted prior to time out. This register
applies to V.42 mode only. S38=255 disables time out,
and the modem only disconnects if data is success-
fully sent or carrier lost.
Data Pattern - Data pattern generated during &T4 and
&T5 transmit tests.
0 – All spaces (0s)
1 – All marks (1s)
2 – Random data
Table 31. S-Register Descriptions (Continued)
Function
Definition
Rev. 0.9
(Decimal)
Default
14
50
12
20
0
0
0
10–255
Range
0–255
1–255
0–255
0–255
0–255
0–2
0.02 second
0.1 second
AN93
seconds
seconds
seconds
minutes
Units
—
67
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