SI3015-F-FS View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
Manufacturer
SI3015-F-FS Datasheet PDF : 68 Pages
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Si2403
U7D GEND
Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Name
LVFE
LLV AUSDC
ATZD FDP
Type
R/W
R/W R/W
R/W R/W
Reset settings = 0x0000
Bit
15:14
13
12:11
10
9
8:2
1
0
Name
Reserved
LVFE
Reserved
LLV
AUSDC
Reserved
ATZD
FDP
Function
Reads returns to zero.
LVCS Filter Enable.
0 = Normal operation
1 = Enables optional filtering on LVCS to mitigate the effect of 50/60 Hz noise on tip/ring volt-
age.
Read returns zero.
0 = Normal operation.
1 = Enables an optional algorithm for countries, such as Japan and Malaysia, with low loop
voltage. Also set U67[3:2] (DCT) = 00b, U69[4] VOL = 1b, and U52 = 0x0002 before going off-
hook. When the modem goes off-hook, it samples LVCS and changes DCT and VOL as nec-
essary to maximize transmit levels and optimize distortion.
0 = Normal operation.
1 = Causes the modem to go off-hook in Japan mode and then revert to FCC mode after
500 ms. This allows the modem to meet the Australian line seizure requirements while allow-
ing the maximum transmit power (optional for Australia and when DCT = 01b).
Reads returns to zero.
ATZ Disable.
0 = ATZ functions normally.
1 = Disable ATZ command. This may be used to ensure modem settings are not lost in some
systems.
FSK Data Processing.
0 = FSK data processing stops when carrier is lost.
1 = FSK data processing continued for 2 bytes after carrier is lost.
56
Rev. 1.2
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