SI3015-F-FS View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
Manufacturer
SI3015-F-FS Datasheet PDF : 68 Pages
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Si2403
U79 GEN4
Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Name
LVCS[4:0]
Type
R
Bit Name
Function
15:5 Reserved Read returns zero.
4:0 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, OFHK, and ONHM bits.
On-Hook Voltage Monitor (2.75 V/bit ±20%) (see Figure 6 on page 19).
00000 = No line connected.
00001 = Minimum line voltage (VMIN = 3.0 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 + 1.6k)/(R5 +1.6k)/5
U69[2] (MODE) must be set to 1b before reading LVCS while the Si2403 is on-hook. See
MODE on page 46.
U69[2] (MODE) must be disabled (MODE = 0b) before the Si2403 can go off-hook, dial, or
answer a call.
Off-Hook Loop Current Monitor (3 mA/bit) (see Figure 7 on page 19).
00000 = No loop current.
00001 = Minimum loop current.
11110 = Maximum loop current.
11111 = Loop current is excessive (overload).
Overload > 140 mA in all modes except CTR21
Overload > 54 mA in CTR21 mode
Rev. 1.2
53
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