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 19. International Control 4
Bit
D7
D6
D5
D4
Name
LVCS [4:0]
Type
R
Reset settings = 0000_0000
D3
D2
D1
D0
OVL
DOD
OPD
R
R
R
Bit Name
Function
7:3 LVCS[4:0] Line Voltage/Current Sense.
Represents either the line voltage, loop current, or on-hook line monitor depending on the
state of the MODE, OH, and ONHM bits.
On-Hook Voltage Monitor (2.75 V/bit).
00000 = No line connected.
00001 = Minimum line voltage (VMIN = 3 V ± 0.5 V).
11111 = Maximum line voltage (87 V ± 20%).
The line voltage monitor full scale may be modified by changing R5 as follows:
VMAX = VMIN + 4.2 (10M + R5 + 1.6 k)/[(R5 +1.6 k)*5]
Off-Hook Loop Current Monitor (3 mA/bit).
00000 = Loop current is less than required for normal operation.
00001 = Minimum normal loop current.
11110 = Maximum normal loop current.
11111 = Loop current is excessive (overload).
Overload > 140 mA in all modes except CTR21.
Overload > 54 mA in CTR21 mode.
2
OVL Overload Detected.
This bit has the same function as ROV in Register 17 but will clear itself after the overload has
been removed. See "4.15. Billing Tone Detection" on page 19. This bit is only masked by the
off-hook counter and is not affected by the BTE bit.
0 = Normal receive input level.
1 = Excessive receive input level.
1
DOD Recal/Dropout Detect.
When the line-side device is off-hook, it is powered from the line itself. If this line-derived
power supply collapses, such as when the line is disconnected, this bit is set to 1. Sixteen
frames (16/Fs) after the line-derived power supply returns, this bit is set to 0. When on-hook,
this bit is set to 0.
0 = Normal operation.
1 = Line supply dropout detected when on-hook.
0
OPD Overload Protect Detected.
0 = Inactive.
1 = Overload protection active.
Note: See description of overload protect operation (OPE bit).
40
Rev. 1.0
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