SI3018-GS Silicon Laboratories Inc, SI3018-GS Datasheet - Page 67

• Manufacturer Part Number: SI3018-GS
• Description: IC VOICE DAA GCI/PCM/SPI 16SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3018-GS

• Function: Data Access Arrangement (DAA)
• Interface: Serial
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 8.5mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Includes: Line Voltage Monitor, Loop Current Monitor, Overload Detection, Parallel Handset Detection, Polarity Reversal Detection, TIP and
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Register 24. Ring Validation Control 3
Reset settings = 0001_1001
Bit
5:0
Name
Type
7
6
Bit
Reserved
RAS[5:0]
RNGV
Name
RNGV
R/W
D7
D6
Ring Validation Enable.
0 = Ring validation feature is disabled.
1 = Ring validation feature is enabled in both normal operating mode and low-power
mode.
Reserved and may read either a 1 or 0.
Ring Assertion Time.
These bits set the minimum ring frequency for a valid ring signal within a 10% margin of
error. During ring qualification, a timer is loaded with the RAS[5:0] field upon a TIP/RING
event and decrements at a regular rate. When a subsequent TIP/RING event occurs, the
timer value is compared to the RMX[5:0] field and if it exceeds the value in RMX[5:0] then
the frequency of the ring is too high and the ring is invalidated. The difference between
RAS[5:0] and RMX[5:0] identifies the minimum duration between TIP/RING events to qual-
ify as a ring, in binary-coded increments of 2.0 ms (nominal). A TIP/RING event typically
occurs twice per ring tone period. At 20 Hz, TIP/RING events would occur every 1/
(2 x 20 Hz) = 25 ms. To calculate the correct RMX[5:0] value for a frequency range [f_min,
f_max], the following equation should be used:
To compensate for error margin and ensure a sufficient ring detection window, it is recom-
mended that the calculated value of RMX[5:0] be incremented by 1.
R
D5
D4
RMX 5:0
[
] RAS 5:0
D3
Rev. 1.05
≥
RAS[5:0]
R/W
[
D2
]
Function
–
------------------------------------------ - RMX RAS
2 f_min
×
D1
1
×
2 ms
D0
,
Si3018/19/10
≤
67