SI3016-F-FS View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
Manufacturer
SI3016-F-FS Datasheet PDF : 50 Pages
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Si3016
Register 16. International Control 1
Bit
D7
D6
D5
D4
Name OFF/SQL2 OHS
ACT
Type
R/W
R/W
R/W
Reset settings = 0000_1000
D3
D2
DCT[1:0]
R/W
D1
D0
RZ
RT
R/W
R/W
Bit Name
Function
7 OFF/SQL2 DC Termination Off (DAA is off-hook).
When the DAA is off-hook, this bit functions as the DC Termination Off bit. When the DAA is
on-hook, this bit functions as the Enhanced Ring Detect Network Squelch bit.
0 = Normal operation.
1 = DC termination disabled and the device presents an 800 Ω dc impedance to the line
which is used to enhance operation with a parallel phone. The DCT pin voltage is also
reduced for improved low line voltage performance.
Enhanced Ring Detect Network Squelch (DAA is on-hook).
To properly receive caller ID data, this bit must be set following a polarity reversal or ring sig-
nal detection and must be left enabled during the reception of caller ID data. It should be dis-
abled before the start of the next ring signal. It is used to recover the offset on the RNG1/2
pins after a polarity reversal or ring signal.
0 = Normal operation.
1 = Enhanced squelch function is enabled.
6
OHS On-Hook Speed.
0 = The Si3016 will execute a fast on-hook. (Off-hook counter = 1024/Fs seconds.)
1 = The Si3016 will execute a slow, controlled on-hook. (Off-hook counter = 4096/Fs
seconds.)
5
ACT AC Termination Select.
0 = Selects the real impedance.
1 = Selects the complex impedance.
4 Reserved Read returns zero.
3:2 DCT[1:0] DC Termination Select.
00 = Low Voltage Mode. (Transmit level = –5 dBm).
01 = Japan Mode. Lower voltage mode. (Transmit level = –3 dBm).
10 = FCC Mode. Standard voltage mode. (Transmit level = –1 dBm).
11 = CTR21 Mode. Current limiting mode. (Transmit level = –1 dBm).
1
RZ Ringer Impedance.
0 = Maximum (high) ringer impedance.
1 = Synthesized ringer impedance. C15, R14, Z2, and Z3 must not be installed when setting
this bit. See "4.12. Ringer Impedance" on page 18.
0
RT Ringer Threshold Select.
Used to satisfy country requirements on ring detection. Signals below the lower level will not
generate a ring detection; signals above the upper level are guaranteed to generate a ring
detection.
0 = 11 to 22 VRMS
1 = 17 to 33 VRMS
36
Rev. 1.0
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