SI3056 Datasheet, PDF (70/94 Pages) Silicon Laboratories – GLOBAL SERIAL INTERFACE DIRECT ACCESS ARRANGEMENT

Si3056
Si3018/19/10
Register 27. Reserved
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Type
Reset settings = xxxx_xxxx
Bit Name
7:0 Reserved Do not read or write.
Function
Register 28. Loop Current Status
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
LCS2[7:0]
Type
R
Reset settings = 0000_0000
Bit Name
Function
7:0 LCS2[7:0] Loop Current Status.
Eight-bit value returning the loop current. Each bit represents 1.1 mA of loop current.
0000_0000 = Loop current is less than required for normal operation.
Register 29. Line Voltage Status
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
LVS[7:0]
Type
R
Reset settings = 0000_0000
Bit Name
Function
7:0 LVS[7:0] Line Voltage Status.
Eight-bit value returning the loop voltage. Each bit represents 1 V of loop voltage. This regis-
ter operates in on-hook and off-hook modes. Bit seven of this register indicates the polarity of
the TIP/RING voltage. When this bit changes state, it indicates that a polarity reversal has
occurred. The value returned is represented in 2s compliment format.
0000_0000 = No line is connected.
70
Rev. 1.05