SI3056 Datasheet, PDF (61/94 Pages) Silicon Laboratories – GLOBAL SERIAL INTERFACE DIRECT ACCESS ARRANGEMENT

Si3056
Si3018/19/10
Register 17. International Control 2
Bit
D7
D6
D5
D4
Name CALZ MCAL CALD
Type R/W R/W R/W
D3
D2
D1
D0
OPE BTE ROV BTD
R/W R/W R/W
R
Reset settings = 0000_0000
Bit Name
Function
7
CALZ Clear ADC Calibration.
0 = Normal operation.
1 = Clears the existing calibration data. This bit must be written back to 0 after being set.
6
MCAL Manual ADC Calibration.
0 = No calibration.
1 = Initiate manual ADC calibration.
5
CALD ADC Auto-Calibration Disable.
0 = Enable auto-calibration.
1 = Disable auto-calibration.
4 Reserved Read returns zero.
3
OPE Overload Protect Enable.
0 = Disabled.
1 = Enabled.
The OPE bit should always be cleared before going off-hook.
2
BTE Billing Tone Detect Enable.
When set, the DAA can detect a billing tone signal on the line and maintain on off-hook state
through the billing tone. If a billing tone is detected, the BTD bit (Register 17) is set to indicate
the event. Writing this bit to zero clears the BTD bit.
0 = Billing tone detection disabled. The BDT bit is not function.
1 = Billing tone detection enabled. The BDT is functional.
1
ROV Receive Overload.
This bit is set when the receive input has an excessive input level (i.e., receive pin goes below
ground). Writing a zero to this location clears this bit and the ROVI bit (Register 4, bit 6).
0 = Normal receive input level.
1 = Excessive receive input level.
0
BTD Billing Tone Detected.
This bit is set if a billing tone is detected. Writing a zero to BTE clears this bit.
0 = No billing tone detected.
1 = Billing tone detected.
Rev. 1.05
61