SI3232PPT0-EVB Silicon Laboratories Inc, SI3232PPT0-EVB Datasheet - Page 38
![no-image](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_sml.jpg)
SI3232PPT0-EVB
Manufacturer Part Number
SI3232PPT0-EVB
Description
BOARD EVAL W/SI3200 INTERFACE
Manufacturer
Silicon Laboratories Inc
Series
ProSLIC®r
Datasheet
1.SI3232-FQ.pdf
(128 pages)
Specifications of SI3232PPT0-EVB
Main Purpose
Interface, Analog Front End (AFE)
Utilized Ic / Part
Si3232
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Si3232
4.6.1. Internal Sinusoidal Ringing
A sinusoidal ringing waveform is generated by using an
on-chip digital tone generator. The tone generator used
to generate ringing tones is a two-pole resonator with a
programmable frequency and amplitude. Since ringing
frequencies are low compared to the audio band
signaling frequencies, the sinusoid is generated at a
1 kHz rate. The ringing generator is programmed via the
RINGFREQ,
locations. The equations are as follows:
38
Ringing Waveform
Ringing Active Timer Enable
Ringing Inactive Timer Enable
Ringing Oscillator Enable Monitor
Ringing Oscillator Active Timer
Ringing Oscillator Inactive Timer
Linefeed Control (Initiates Ringing
State)
On-Hook Line Voltage
Ringing Voltage Offset
Ringing Frequency
Ringing Amplitude
Ringing Initial Phase
Sinusoidal
Trapezoid
Ringing Overhead Voltage
Ringing Speedup Timer
Parameter
RINGAMP,
coeff
Table 23. Register and RAM Locations used for Ringing Generation
=
cos
⎛
⎝
and
---------------------- -
1000 Hz
2πf
RINGPHAS
⎞
⎠
Register/RAM
SPEEDUPR
RINGTALO/
RINGFRLO
RINGPHAS
RINGFRHI/
Mnemonic
RINGTILO/
LINEFEED
RINGCON
RINGCON
RINGCON
RINGCON
RINGAMP
RINGTAHI
VOVRING
RINGTIHI
RINGOF
VOC
Preliminary Rev. 0.96
RAM
SPEEDUPR[15:0]
RINGFRLO[14:3]
RINGPHAS[15:0]
RINGFRHI[14:3]/
RINGAMP[15:0]
VOVRING[15:0]
Register/RAM
RINGOF[15:0]
For example, to generate a 60 V
ringing signal, the equations are as follows:
RINGTA[15:0]
RINGTI[15:0]
RINGFREQ
VOC[15:0]
RINGEN
LF[2:0]
TRAP
TAEN
TIEN
Bits
RINGAMP
coeff
=
RINGFREQ
=
.99211
1
-- - 1 coeff
4
=
Sinusoid/Trapezoid
RINGPHAS
Enabled/Disabled
Enabled/Disabled
Enabled/Disabled
cos
Programmable
----------------------- -
1
0 to 160.173 V
+
–
×
0 to 1.024 s
0 to 40.96 s
4 to 100 Hz
0 to 63.3 V
0 to 63.3 V
0 to 63.3 V
0 to 8.19 s
0 to 8.19 s
000 to 111
⎛
⎝
coeff
(
---------------------- -
1000 Hz
2
Range
2π20
23
N/A
=
)
×
coeff 2
=
(
=
2
8322461
⎞
⎠
15
=
0
rms
×
)
.99211
×
23
Desired V
-----------------------------------
(87 V
160.173 V
=
Resolution
(LSB Size)
(4.907 mV)
(4.907 mV)
(4.907 mV)
(4.907 mV)
0x7EFD9D
31.25 µs
1.25 ms
1.005 V
1.005 V
628 mV
1.005 V
125 ms
125 ms
PK
N/A
N/A
N/A
N/A
N/A
N/A
), 20 Hz
PK
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