SI2414 SILABS [Silicon Laboratories], SI2414 Datasheet - Page 62

• Manufacturer Part Number: SI2414
• Manufacturer: SILABS [Silicon Laboratories]

Si2456/Si2433/Si2414
U79 GEN4
Reset settings = 0x0000
62
Name
15:5
Type
Bit
4:0
Bit
Reserved Read returns zero.
D15
Name
LVCS
D14
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 7 on page 37).
00000 = No line connected.
00001 = Minimum line voltage (V
11111 = Maximum line voltage (87 V ± 20%).
The line voltage monitor full scale may be modified by changing R5 as follows:
V
U69[2] (MODE) must be set to 1
MODE on page 54.
U69[2] (MODE) must be disabled (MODE = 0
or answer a call.
Off-Hook Loop Current Monitor (3 mA/bit) (see Figure 8 on page 38).
00000 = No loop current.
00001 = Minimum loop current.
11110 = Maximum loop current.
11111 = Loop current is excessive (overload).
MAX
D13
= V
D12
Overload > 140 mA in all modes except CTR21
Overload > 54 mA in CTR21 mode
MIN
+ 4.2 (10M + R5 + 1.6k)/(R5 +1.6k)/5
D11
D10
D9
b
Rev. 0.9
MIN
before reading LVCS while the ISOmodem is on-hook. See
D8
= 3.0 V ± 0.5 V).
Function
D7
b
) before the ISOmodem can go off-hook, dial,
D6
D5
D4
D3
LVCS
D2
R
D1
D0