SI3210-KTR Silicon Laboratories Inc, SI3210-KTR Datasheet - Page 43

• Manufacturer Part Number: SI3210-KTR
• Description: Telecom Line Management ICs Sgl Ch SLIC/Codec w/ DTMF Decoder
• Manufacturer: Silicon Laboratories Inc
• Type: ProSLIC Programmable CMOS SLICr

Specifications of SI3210-KTR

• Product: Telecom
• Supply Current: 4 mA
• Maximum Operating Temperature: 100 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-14
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

When
LF[2:0] = 100 (direct Register 64), the ProSLIC will go
into the ringing state and start the first ring. At the
expiration of RAT, the ProSLIC will turn off the ringing
waveform and will go to the on-hook transmission state.
At the expiration of RIT, ringing will again be initiated.
This process will continue as long as the two timers are
enabled and the Linefeed Control register is set to the
ringing state.
2.4.2. Sinusoidal Ringing
To configure the ProSLIC for sinusoidal ringing, the
frequency and amplitude are initialized by writing to the
following indirect registers: RCO, RNGX, and RNGY.
The equations for RCO, RNGX, RNGY are as follows:
where
and f = desired ringing frequency in Hertz.
Note: The ProSLIC uses registers that are both directly and indirectly mapped. A “direct” register is one that is mapped
Common Mode Bias Adjust During Ringing
Linefeed Control (Initiates Ringing State)
Ringing Oscillator Inactive Timer
Ringing Oscillator Active Timer
Ringing Voltage Offset Enable
Ringing Inactive Timer Enable
directly. An “indirect” register is one that is accessed using the indirect access registers (direct registers 28 through
31).
Ringing Active Timer Enable
the
Ringing Oscillator Enable
Ringing dc voltage offset
High Battery Voltage
Ringing initial phase
Ringing Waveform
Ringing frequency
Ringing amplitude
ringing
Parameter
coeff
RCO
state
=
=
cos
coeff


---------------------- -
1000 Hz
is

Table 30. Registers for Ringing Generation
2f

2
invoked
15



by
Ringing State = 100b
sinewave and period
Range/ Description
Sets initial phase for
writing
Sine/Trapezoid
0 to 8 seconds
0 to 8 seconds
15 to 100 Hz
0 to –94.5 V
0 to 94.5 V
0 to 94.5 V
0 to 22.5 V
trapezoid
Enabled/
Disabled
Enabled/
Disabled
Enabled/
Disabled
Enabled/
Disabled
Rev. 1.5
for
The minimum allowed peak TIP-to-RING ringing voltage
depends on the linefeed state. In the forward active
linefeed state, the selected ringing amplitude (RNGX,
Indirect Register 21) plus the selected ringing dc voltage
offset (ROFF, Indirect Register 19) must be greater than
the selected on-hook line voltage setting (VOC, direct
Register 72). In the reverse active linefeed state, the
selected ringing amplitude (RNGX, Indirect Register 21)
minus the selected ringing dc voltage offset (ROFF,
Indirect Register 19) must be greater than the selected
on-hook line voltage setting (VOC, direct Register 72).
Using a 70 VPK 20 Hz ringing signal as an example, the
equations are as follows:
RNGX
=
1
-- -
4

coeff
RNGX[15:0]
RNGY[15:0]
ROFF[15:0]
VBATH[5:0]
VCMR[3:0]
RCO[15:0]
RAT[15:0]
RIT[15:0]
Register
----------------------- -
1
1 coeff
LF[2:0]
TSWS
RTAE
RTIE
–
+
RVO
ROE
Bits
=
coeff
cos
RNGY



Si3210/Si3211
---------------------- -
1000 Hz
2 20
2
15

Direct Registers 48 and 49
Direct Registers 50 and 51

=
Desired V
----------------------------------------------------------------------- -
Indirect Register 19
Indirect Register 20
Indirect Register 21
Indirect Register 22
Indirect Register 40
0


Direct Register 34
Direct Register 34
Direct Register 34
Direct Register 34
Direct Register 34
Direct Register 64
Direct Register 74
=
0.99211
Location
PK
96 V

0 to 94.5 V
43
