SI3018-F-GSR Silicon Laboratories Inc, SI3018-F-GSR Datasheet - Page 27
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SI3018-F-GSR
Manufacturer Part Number
SI3018-F-GSR
Description
Manufacturer
Silicon Laboratories Inc
Datasheet
1.SI3018-F-GSR.pdf
(111 pages)
Specifications of SI3018-F-GSR
Lead Free Status / Rohs Status
Supplier Unconfirmed
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5.12.1. Line Voltage Measurement
The Si3050 reports line voltage with the LVS[7:0] bits
(Register 29) in both on- and off-hook states with a
resolution of 1 V per bit. The accuracy of these bits is
approximately ±10%. Bits 0 through 7 of this 8-bit
signed number indicate the value of the line voltage in
2s complement format. Bit 7 indicates the polarity of the
TIP/RING voltage.
If the INTE bit (Register 2, bit 7) and the POLM bit
(Register 3, bit 0) are set, a hardware interrupt is
generated on the AOUT/INT pin when Bit 7 of the LVS
BITS
LCS
30
25
20
15
10
5
0
(Si3019 Line Side Only)
0
3.3
6.6
9.9 13.2 16.5 19.8 23.1 26.4
Figure 19. Typical Loop Current LCS Transfer Function (ILIM = 0)
29.7
33
36.3 39.6 42.9 46.2 49.5 52.8 56.1 59.1 62.7 66
Loop Current (mA)
Rev. 1.31
register changes state. The edge-triggered interrupt is
cleared by writing 0 to the POLI bit (Register 4, bit 0).
The POLI bit is set each time bit 7 of the LVS register
changes state, and must be written to 0 to clear it. The
default state of the LVS register forces the LVS[7:0] bits
to 0 when the line voltage is 3 V or less. The LVFD bit
(Register 31, bit 0) disables this force-to-zero function
and allows the LVS register to display non-zero values
of
unpredictable values at line voltages between 0 to 2 V.
At 0 V, the LVS register displays all 0s.
3 V
69.3 72.6 75.9 79.2
and
Si3050 + Si3018/19
82.5 85.8 89.1 92.4 95.7 99 102.3
below.
This
Possible Overload
register
may
127
display
27
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