SI2414 SILABS [Silicon Laboratories], SI2414 Datasheet - Page 53

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

U68 ITC2
Reset settings = 0x0000
Notes:
15:8
Name
Type
Bit
7:5
Bit
4
3
2
1
0
1. See Table 19 on page 39
2. See "Appendix A—DAA Operation" on page 67
Reserved Read returns zero.
Reserved Do not modify.
Reserved Do not modify.
D15 D14 D13 D12 D11 D10
LIM
Name
ROV
BTD
BTE
1,2
2
2
2
Current Limit.
0 = All other modes.
1 = CTR21 mode.
Billing Tone Protect Enable.
0 = Disabled.
1 = Enabled.
When set, the DAA responds automatically to a collapse of the line-derived power supply dur-
ing a billing tone event. When off-hook, if BTE = 1 and BTD goes high, the dc termination is
released (800 Ω presented to line). If BTE and RIM (U70, bit 9) are set, an RI (U70, bit 1)
interrupt also occurs when BTD goes high.
Receive Overload.
The bit is set when the receive input (i.e., receive pin goes below ground) has an excessive
input level. This bit is cleared by writing a 0 to this location.
0 = Normal receive input level.
1 = Excessive receive input level.
Billing Tone Detected.
This bit is set if a billing tone is detected. This bit is cleared by writing a 0 to this location.
0 = No billing tone.
1 = Billing tone detected.
D9
Rev. 0.9
D8
D7
Function
Si2456/Si2433/Si2414
D6
D5
R/W
LIM
D4
D3
BTE ROV BTD
R/W R/W R/W
D2
D1
D0
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