參數(shù)資料
型號： SI3230-KT
廠商： Silicon Laboratories Inc
文件頁數(shù)： 37/108頁
文件大?。?/td> 0K
描述： IC SLIC PROG 1-CH 38TSSOP
標(biāo)準(zhǔn)包裝： 50
系列： ProSLIC®
功能： 用戶線路接口概念（SLIC）
接口： SPI
電路數(shù)： 1
電源電壓： 3.13 V ~ 5.25 V
電流 - 電源： 88mA
功率（瓦特）： 700mW
安裝類型： 表面貼裝
封裝/外殼： 38-TFSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 38-TSSOP
包裝： 管件
包括： DTMF 生成和解碼，F(xiàn)SK 生成
Si3230
34
Preliminary Rev. 0.96
Not
Recommended
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The pulse metering oscillator has a volume envelope
(linear ramp) on the on/off transitions of the oscillator.
The volume value is incremented by the value in the
PLSD register (indirect Register 23) at an 8 kHz rate.
The sinusoidal generator output is multiplied by this
volume before being sent to the DAC. The volume will
ramp from 0 to 7FFF in increments of PLSD so the
value of PLSD will set the slope of the ramp. When the
pulse metering signal is turned off, the volume will ramp
to 0 by decrementing according to the value of PLSD.
Figure 15. Pulse Metering Volume Envelope
2.6. DTMF Detection
The dual-tone multi-frequency (DTMF) tone signaling
standard is also known as touch tone. It is an in-band
signaling
system
used
to
replace
the
pulse-dial
signaling standard. In DTMF, two tones are used to
generate a DTMF digit. One tone is chosen from four
possible row tones, and one tone is chosen from four
possible column tones. The sum of these tones
constitutes one of 16 possible DTMF digits.
2.6.1. DTMF Detection Architecture
DTMF detection is performed using a modified Goertzel
algorithm to compute the dual frequency tone (DFT) for
each of the eight DTMF frequencies as well as their
second harmonics. At the end of the DFT computation,
the squared magnitudes of the DFT results for the eight
DTMF fundamental tones are computed. The row
results are sorted to determine the strongest row
frequency; the column frequencies are sorted as well.
At the completion of this process, a number of checks
are made to determine whether the strongest row and
column tones constitute a DTMF digit.
The detection process is performed twice within the
45 ms minimum tone time. A digit must be detected on
two
consecutive
tests
following
a
pause
to
be
recognized as a new digit. If all tests pass, an interrupt
is generated, and the DTMF digit value is loaded into
the DTMF register. If tones are occurring at the
maximum rate of 100 ms per digit, the interrupt must be
serviced within 85 ms so that the current digit is not
overwritten by a new one. There is no buffering of the
digit information.
Pulse Metering Oscillator
Volum e
+/–
PLSD
To DAC
Clip to 7FFF or 0
8 Khz
X
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SI3230-KTR 制造商:Silicon Laboratories Inc 功能描述:
SI3230M-E-FM 功能描述:射頻無線雜項 Single-Channel SLIC RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel
SI3230M-E-FMR 功能描述:電信線路管理 IC Single-CH SLIC only DTMF Decoder dc-dc RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
SI3230M-GT 制造商:SILABS 制造商全稱:SILABS 功能描述:PROSLIC㈢ PROGRAMMABLE CMOS SLIC WITH RINGING/BATTERY VOLTAGE GENERATION
SI3230M-KT 制造商:SILABS 制造商全稱:SILABS 功能描述:PROSLIC㈢ PROGRAMMABLE CMOS SLIC WITH RINGING/BATTERY VOLTAGE GENERATION
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