SI3201-FS View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
Manufacturer
SI3201-FS
Silicon Laboratories
SI3201-FS Datasheet PDF : 108 Pages
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Si3230
Table 28. Recommended Ring Trip Values for Ringing
Ringing
Frequency
Hz
16.667
20
30
40
50
60
NRTP
decimal
64
100
112
128
213
256
hex
0200
0320
0380
0400
06A8
0800
RPTP
decimal
34 mA
34 mA
34 mA
34 mA
34 mA
34 mA
hex
3600
3600
3600
3600
3600
3600
RTDI
decimal
hex
15.4 ms
0F
12.3 ms
0B
8.96 ms
09
7.5 ms
07
5 ms
05
4.8 ms
05
2.5. Pulse Metering Generation
There is an additional tone generator suitable for
generating tones above the audio frequency. This
oscillator is provided for the generation of billing tones
which are typically 12 kHz or 16 kHz. The generator
follows the same algorithm as described in "2.3. Tone
Generation" on page 26 with the exception that the
sample rate for computation is 64 kHz instead of 8 kHz.
The equations are as follows:
coeff
=
cos
⎛
⎝
6----4---0--2-0---π-0---f--H-----z--⎠⎞
PLSX
=
1--
4
-1-----–----c---o----e----f--f
1 + coeff
×
(
215
–
1
)
×
----D----e----s----i-r---e---d------V----r--m----s----
Full Scale Vrms
where full scale Vrms = 0.85 Vrms for a matched load.
The initial phase of the pulse metering signal is set to 0
internally so there is no register to serve this purpose.
The pulse metering generator timers and associated
pulse metering timer registers are similar to that of the
tone generators. These timers count 8 kHz sample
periods like the other tones even though the sinusoid is
generated at 64 kHz.
PLSCO = coeff × (215 – 1)
Table 29. Associated Pulse Metering Generator Registers
Parameter
Description / Range
Register Bits
Location
Pulse Metering Frequency Coeffi-
cient
Sets oscillator frequency PLSCO[15:0]
Indirect Register 25
Pulse Metering Amplitude Coefficient Sets oscillator amplitude
PLSX[15:0]
Indirect Register 24
Pulse Metering Attack/Decay Ramp 0 to PLSX (full amplitude)
Rate
PLSD[15:0]
Indirect Register 23
Pulse Metering Active Timer
0 to 8 seconds
PAT[15:0] Direct Registers 44 & 45
Pulse Metering Inactive Timer
0 to 8 seconds
PIT[15:0]
Direct Register 46 & 47
Pulse Metering Control
Status and control registers PSTAT, PMAE,
PMIE, PMOE
Direct Register 35
Note: The ProSLIC uses registers that are both directly and indirectly mapped. A “direct” register is one that is mapped
directly. An “indirect” register is one that is accessed using the indirect access registers (direct registers 28
through 31).
Preliminary Rev. 0.96
33
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