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參數(shù)資料
| 型號： | MT90820 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Large Digital Switch(大數(shù)字開關(guān)) |
| 中文描述： | 大型數(shù)字交換（大數(shù)字開關(guān)） |
| 文件頁數(shù)： | 19/33頁 |
| 文件大?。?/td> | 132K |
| 代理商： | MT90820 |
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CMOS
MT90820
19
Figure 5 - Switch Matrix with Serial Stream at Various Bit Rates
Figure 6 - Serial Input Frame Alignment Evaluation for Various Frame Pulses
16 Streams
IN
16 Streams
OUT
16 Streams
16 Streams
MT90820
#1
MT90820
#2
MT90820
#3
MT90820
#4
2.048 Mb/s
4.096 Mb/s
8.192 Mb/s
1,024 - Channel Switch
2,048 - Channel Switch
4,096 - Channel Switch
Bit Rate
(IN/OUT)
Size of
Switch Matrix
STi0
STi1
STi2
STo[0:15]
STi15
Frame Alignment
Evaluation circuit
Central
Timing Source
FE
input
CLK
FP
FP STi15
FP STi0
FP STi1
FP STi2
External
Mux
MT90820
Note:
1. Use the external mux to select one of the serial frame pulses.
2. To start a measurement cycle, set the Start Frame Evaluation (SFE) bit in the IMS register low for at least 1 frame.
3. Frame evaluation starts when the SFE bit is changed from low to high.
4. Two frames later, the Complete Frame Evaluation (CFE) bit of the Frame Alignment Register (FAR) changes from low to
high to signal the CPU that a valid offset measurement is ready to be read from bit [11:0] of the FAR register.
5. The SFE bit must be set to zero before a new measurement cycle started.
Applications
Switch Matrix Architectures
The MT90820 is an ideal device for medium to large
size switch matrices. Applications where voice and
grouped data channels are transported within the
same frame, the voice samples have to be time
interchanged
with
a
maintaining the integrity of grouped data. To ensure
the integrity of grouped data during switching and to
provide a minimum delay for voice connections, the
MT90820
provides
the
between variable and constant throughput delay.
minimum
delay
while
per-channel
selection
This can be selected by the V/C bit of the Connection
Memory. Figure 5 illustrates how four MT90820
devices can be used to form non-blocking switches
up to 4096 channels with data rate of 8.192 Mb/s.
Serial Input Frame Alignment Evaluation
The MT90820 is capable of performing frame
alignment evaluation. The frame pulse under
evaluation
is
connected
measure-ment) pin. An external multiplexer is
required to selected one of the frame pulses related
to the different input streams. Figure 6 gives an
example of performing measurement for 16 frame
pulses can be performed.
to
the
FE
(frame
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT90820AL | 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 2K X 2K/1K X 1K/512 X 512 131.072MBPS 5V 100MQFP - Trays |
| MT90820AL1 | 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 2K X 2K/1K X 1K/512 X 512 131.072MBPS 5V 100MQFP - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC DGTL SWITCH 2048X2048 100MQFP 制造商:Microsemi Corporation 功能描述:IC DGTL SWITCH 2048X2048 100MQFP |
| MT90820AP | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Large Digital Switch |
| MT90820AP1 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Large Digital Switch |
| MT90820APR | 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 2K X 2K/1K X 1K/512 X 512 5V 84PLCC - Tape and Reel |
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