SI3200-BS Silicon Laboratories Inc, SI3200-BS Datasheet - Page 38

• Manufacturer Part Number: SI3200-BS
• Description: IC LINEFEED INTRFC 100V 16SOIC
• Manufacturer: Silicon Laboratories Inc
• Series: ProSLIC®r

Specifications of SI3200-BS

• Function: Subscriber Line Interface Concept (SLIC), CODEC
• Interface: GCI, PCM, SPI
• Number Of Circuits: 2
• Voltage - Supply: 3.3V, 5V
• Current - Supply: 110µA
• Power (watts): 941mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Includes: Battery Switching, BORSCHT Functions, DTMF Generation and Decoding, FSK Tone Generation, Modem and Fax Tone Detection
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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