SI3011-F-FSR Silicon Laboratories Inc, SI3011-F-FSR Datasheet - Page 29

• Manufacturer Part Number: SI3011-F-FSR
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3011-F-FSR

• Lead Free Status / RoHS Status: Supplier Unconfirmed

The billing tone filter affects the DAA’s ac termination
and return loss.
5.24. On-Hook Line Monitor
The on-hook line monitor mode allows the Si3050 to
receive line activity when in an on-hook state. This
mode is typically used to detect caller ID data (see
“5.25.Caller ID”) and is enabled by setting the ONHM bit
(Register 5, bit 3). Caller ID data can be gained up or
attenuated using the receive gain control bits in
Registers 39 and 41.
5.25. Caller ID
The Si3050 can pass caller ID data from the phone line
to a caller ID decoder connected to the DAA.
5.25.1. Type I Caller ID
Type I Caller ID sends the CID data when the phone is
on-hook.
In systems where the caller ID data is passed on the
phone line between the first and second rings, utilize the
following method to capture the caller ID data:
1. After identifying a ring signal using one of the
Table 16. Component Values—Optional Billing
Component
methods described in "5.18. Ring Detection" on
page 26, determine when the first ring is complete.
From Line
C1,C2
RING
C3
L1
L2
TIP
Figure 23. Billing Tone Filter
3.3 mH, >120 mA, <10  , ±10%
10 mH, >40 mA, <10  , ±10%
Tone Filters
0.027 µF, 50 V, ±10%
0.01 µF, 250 V, ±10%
C1
C2
L1
Value
C3
L2
DAA
To
Rev. 1.11
2. Assert the ONHM bit (Register 5, bit 3) to enable
3. Clear the ONHM bit after the caller ID data is
In systems where the caller ID data is preceded by a
line polarity (battery) reversal, use the following method
to capture the caller ID data:
1. Enable full wave rectified ring detection (RFWE,
2. Monitor the RDTP and RDTN register bits or the
3. Assert the ONHM bit (Register 5, bit 3) to enable
4. Clear the ONHM bit after the caller ID data is
5.25.2. Type II Caller ID
Type II Caller ID sends the CID data while the phone is
off-hook. This mode is often referred to as caller ID/
call waiting (CID/CW). To receive the CID data when
off-hook, use the following procedure (also see
Figure 24):
1. The Caller Alert Signal (CAS) tone is sent from the
2. The DAA must check if there is another parallel
caller ID data detection. The caller ID data is passed
across the RNG 1/2 pins and presented to the host
via the DTX pin.
received.
Register 18, bit 1).
POLI bit to identify if a polarity reversal or a ring
signal has occurred. A polarity reversal trips either
the RDTP or RDTN ring detection bits, therefore the
full-wave ring detector must be used to distinguish a
polarity reversal from a ring. The lowest specified
ring frequency is 15 Hz; so, if a battery reversal
occurs, the DSP should wait a minimum of 40 ms to
verify that the event is a battery reversal and not a
ring signal. This time is greater than half the period
of the longest ring signal. If another edge is detected
during this 40 ms pause, this event is characterized
as a ring signal and not a battery reversal.
caller ID data detection. The caller ID data is passed
across the RNG 1/2 pins and presented to the host
via the DTX pin.
received.
central office (CO) and is digitized along with the line
data. The host processor detects the presence of
this tone.
device on the same line, which is accomplished by
briefly going on-hook, measuring the line voltage,
and returning to an off-hook state.
a. Set the CALD bit (Register 17, bit 5) to disable
b. Set the RCALD bit (Register 25, bit 5) to disable
c. Set the FOH[1:0] bits (Register 31 bits 6:5) to 11
the calibration that automatically occurs when
going off-hook.
the resistor calibration that automatically occurs
when going off-hook
Si3050 + Si3011
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