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參數(shù)資料
| 型號： | MT8966 |
| 廠商： | Mitel Networks Corporation |
| 元件分類： | Codec |
| 英文描述： | Integrated PCM Filter Codec |
| 中文描述： | 集成的PCM編解碼器 |
| 文件頁數(shù)： | 7/32頁 |
| 文件大?。?/td> | 607K |
| 代理商： | MT8966 |
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MT8960/61/62/63/64/65/66/67
Data Sheet
7
Zarlink Semiconductor Inc.
Since a single clock frequency of 2.048 MHz is required, all digital data is input and output at this rate. DSTo,
therefore, assumes a high impedance state for all but 3.9
μ
s of the 125
μ
s frame. Similarly, DSTi input data is valid
for only 3.9
μ
s.
Digital Control Functions
CSTi is a digital input (levels GNDD to V
DD
) which is used to control the function of the filter/codec. It operates in
three different modes depending on the logic levels applied to the Control Address input (CA) and chip enable input
(F1i) (see Table 1).
Mode 1
CA=-5V (V
EE
); CSTi=0V (GNDD)
The filter/codec is in normal operation with nominal transmit and receive gain of 0dB. The SD outputs are in their
active states and the test modes cannot be entered.
CA = -5V (V
EE
); CSTi = +5V (V
DD
)
A state of powerdown is forced upon the chip whereby DSTo
becomes high impedance, V
R
is connected to GNDA
and all analog sections have power removed.
Mode 2
CA= -5V (V
EE
); CSTi receives an eight-bit control word
CSTi accepts a serial data stream synchronously with DSTi (i.e., it accepts an eight-bit serial word in a 3.9
μ
s
timeslot, updated every 125
μ
s, and is specified identically to DSTi for timing considerations). This eight-bit control
word is entered into Control Register A and enables programming of the following functions: transmit and receive
gain, powerdown, loopback. Register B is reset to zero and the SD outputs assume their inactive state. Test modes
cannot be entered.
Mode 3
CA=0V (GNDD); CSTi receives an eight-bit control word
As in Mode 2, the control word enters Register A and the aforementioned functions are controlled. In this mode,
however, Register B is not reset, thus not affecting the states of the SD outputs.
CA=+5V (V
DD
); CSTi receives an 8-bit control word
In this case the control word is transferred into Register B. Register A is unaffected. The input and output of PCM
data is inhibited.
The contents of Register B controls the six uncommitted outputs SD0-SD5 (four outputs, SD0-SD3, on
MT8960/61/64/65 versions of chip) and also provide entry into one of the three test modes of the chip.
Note: For Modes 1 and 2, F1i must be at logic low for one period of 3.9
μ
s, in each 125
μ
s cycle, when PCM data
is being input and output, and the control word at CSTi enters Register A. For Mode 3, F1i must be at a logic low for
two periods of 3.9
μ
s, in each 125
μ
s cycle. In the first period, CA must be at GNDD or V
EE
, and in the second
period CA must be high (V
DD)
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8966AS | 制造商:MITEL 功能描述: |
| MT8966AS1 | 制造商:Microsemi Corporation 功能描述: 制造商:Microsemi Corporation 功能描述:PCM FLTR CODEC 20SOIC W - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC CODEC U-LAW CCITT PCM 20SOIC 制造商:Microsemi Corporation 功能描述:IC CODEC U-LAW CCITT PCM 20SOIC |
| MT8966ASR1 | 制造商:Microsemi Corporation 功能描述:AUD CODEC 1ADC / 1DAC 20SOIC W - Tape and Reel 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC CODEC U-LAW CCITT PCM 20SOIC 制造商:Microsemi Corporation 功能描述:IC CODEC U-LAW CCITT PCM 20SOIC |
| MT8967 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Integrated PCM Filter Codec |
| MT8967AS | 制造商:Microsemi Corporation 功能描述: |
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