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 17. International Control 2
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
MCAL
CALD
LIM
OPE
BTE
ROV
BTD
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset settings = 0000_0000
Bit Name
Function
7 Reserved Must be zero.
6
MCAL Manual Calibration.
0 = No calibration.
1 = Initiate calibration.
5
CALD Auto-Calibration Disable.
0 = Enable auto-calibration.
1 = Disable auto-calibration.
4
LIM Current Limit
This bit only affects chip operation when the CTR21 dc termination mode is selected.
0 = No current limiting in CTR21 mode.
1 = Enables current limiting in CTR21 mode. The dc termination will current limit before
60 mA.
3
OPE Overload Protect Enable.
0 = Disable overload protection.
1 = Enable overload protection.
The overload protection feature prevents damage to the DAA when going off-hook with
excessive line current or voltage. When off-hook, if OPE is set and LVCS = 11111, the dc ter-
mination is disabled (800 Ω presented to the line), the hookswitch current is reduced, and the
OPD bit is set. The OPE bit should be written ~25 ms after going off-hook; it should be written
to 0 to reset.
2
BTE Billing Tone Protect Enable.
0 = Disabled.
1 = Enabled.
When set, the Si3016 will automatically respond to a collapse of the line-derived power supply
during a billing tone event. When off-hook, if BTE = 1 and BTD goes high, the dc termination
is changed to present 800 Ω to the line, and the DCT pin stops tracking the receive input pin.
During normal operation, the DCT pin tracks the receive input.
1
ROV Receive Overload.
This bit is set when the receive input has an excessive input level (i.e., receive pin goes below
ground). This bit is cleared by writing a zero to this location.
0 = Normal receive input level.
1 = Excessive receive input level.
0
BTD Billing Tone Detected.
This bit will be set if a billing tone is detected. This bit is cleared by writing a zero to this loca-
tion.
0 = No billing tone detected.
1 = Billing tone detected.
Rev. 1.0
37
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