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參數(shù)資料
| 型號： | PEB2265 |
| 廠商： | SIEMENS AG |
| 元件分類： | Codec |
| 英文描述： | Two Channel Codec Filter with IOM㈢-2 Interface (IOM㈢-2 - SICOFI㈢-2) |
| 中文描述： | 雙信道編解碼器與國際移民組織㈢-2接口（移徙㈢-2 - SICOFI㈢-2） |
| 文件頁數(shù)： | 14/77頁 |
| 文件大?。?/td> | 851K |
| 代理商： | PEB2265 |
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PEB 2265
IOM
-2 – SICOFI
-2 Principles
Semiconductor Group
14
1997-07-01
2.2
IOM
-2 – SICOFI
-2 Block Diagram
Figure 3
The IOM-2 – SICOFI-2 bridges the gap between analog and digital voice signal
transmission in modern telecommunication systems. High performance oversampling
Analog-to-Digital Converters (ADC) and Digital-to-Analog Converters (DAC) provide the
required conversion accuracy. Analog antialiasing prefilters (PREFI) and smoothing
postfilters (POFI) are included. The connection between the ADC and the DAC (with
high sampling rate) and the DSP, is done by specific Hardware Filters, for filtering like
interpolation and decimation. The dedicated Digital Signal Processor (DSP) handles all
the algorithms necessary e.g. for PCM bandpass filtering, sample rate conversion and
PCM companding. The IOM-2 Interface handles digital voice transmission,
IOM-2 – SICOFI-2 feature control and transparent access to the IOM-2 – SICOFI-2
command and indication pins. To program the filters, precalculated sets of coefficients
are downloaded from the system to the on chip coefficient ram (CRAM).
2.3
IOM
-2 Interface
The IOM-2 Interface consists of two data lines and two clock lines. DU (data upstream)
carries data from the IOM-2 – SICOFI-2 to a master device. This master device performs
the
interface
between
the
PCM-backplane,
24 IOM-2 – SICOFI-2's. DD (data downstream) carries data from the master device to
the IOM-2-SICOF-2. A frame synchronization clock signal (8 kHz, FSC) as well as a data
clock signal (2048 kHz or 4096 kHz DCL) has to be supplied to the IOM-2 – SICOFI-2.
The IOM-2 – SICOFI-2 handles data as described in the IOM-2 specification for analog
devices.
the
μ
Controller
and
up
to
DSP
H
H
IOM2-Bus
Signaling
IOM2-Interface
Signaling
DAC
DAC
ADC
ADC
Analog out
Analog in
Analog out
Analog in
Command
Indication
Command
Indication
iom3.wmf
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PEB2265HV1.1 | 制造商:LANTIQ 功能描述:SP000214859_ASIC EOL310705 |
| PEB2265-HV1.1 | 制造商:Infineon Technologies AG 功能描述:Part Number Only 制造商:Siemens 功能描述:Part Number Only |
| PEB2265HV1.1D | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| PEB2266-H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:A-Law/u-Law CODEC |
| PEB2266HV2.2 | 功能描述:接口—CODEC POTS RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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