SI2493-C-FT Silicon Laboratories Inc, SI2493-C-FT Datasheet - Page 89
SI2493-C-FT
Manufacturer Part Number
SI2493-C-FT
Description
56 KBPS, V.92 ISOMODEM SYSTEM-SIDE - LEAD-FREE TSSOP 0 TO 7
Manufacturer
Silicon Laboratories Inc
Specifications of SI2493-C-FT
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
Parallel
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Package / Case
24-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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3.3.35. U6C (LVS)
U6C contains the line voltage status register, LVS, and
resets to 0xXX00. Bits 7:0 are reserved, and a read
returns zero.
15:8
11:3
7:3
Bit
Bit
15
14
13
12
2
1
0
2
1
0
Reserved Read returns zero.
Reserved Do not modify.
Reserved Read returns zero.
Reserved Read returns zero.
Reserved Read returns zero.
Reserved Read only; value indeterminate.
Reserved Read returns zero.
Name
Name
ROV
BTD
SQ1
SQ0
OVL
BTE
Function
Billing Tone Protect Enable.
0
1
Receive Overload.
0
1
Billing Tone Detected.
0
1
Spark quenching. See OHS2.
Spark quenching. See OHS2.
Overload Detected.
This bit has the same function as ROV, but clears itself after the overload has been removed.
This bit is only masked by the off-hook counter and is not affected by the BTE bit.
=
=
=
=
=
=
Disabled.
Enabled.
Normal receive input level.
Excessive receive input level.
No billing tone.
Billing tone detected (cleared by writing 0).
Table 56. U6A Bit Map
Table 55. U68 Bit Map
Rev. 0.9
3.3.36. Modem Control and Interface Registers
Modem Control and Interface registers include registers
U6E, U70–U73, and U76–U79. These are bit-mapped
registers that control functions including TX/RX gain,
clocking, I/O, PCM codecs, intrusion detection, and
LVCS (line voltage current sense).
Function
AN93
89
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