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參數(shù)資料
| 型號： | MT90870 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | Flexible 12 k Digital Switch (F12kDX) |
| 中文描述： | 靈活的12畝數(shù)字交換機(jī)（F12kDX） |
| 文件頁數(shù)： | 33/86頁 |
| 文件大?。?/td> | 2093K |
| 代理商： | MT90870 |
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MT90870
Data Sheet
33
Zarlink Semiconductor Inc.
The
BCSTo0-3
outputs transmit serial data (channel control bits) at 16.384 Mb/s, with each bit representing the per-
channel high impedance state for specific streams. Eight output streams are allocated to each control line as
follows:
(See also
Pin Description
)
BCSTo0 outputs the channel control bits for streams BSTo0, 4, 8, 12, 16, 20, 24 and 28.
BCSTo1 outputs the channel control bits for streams BSTo1, 5, 9, 13, 17, 21, 25 and 29.
BCSTo2 outputs the channel control bits for streams BSTo2, 6, 10, 14, 18, 22, 26 and 30.
BCSTo3 outputs the channel control bits for streams BSTo3, 7, 11, 15, 19, 23, 27 and 31.
The Channel Control Bit location, within a frame period, for each channel of the Backplane output streams is
presented in
Table 3,
BCSTo Allocation of Channel Control Bits to the Output Streams (non-32 Mb/s Mode)
.
As an aid to the description, the channel control bit for a single channel on specific streams is presented, with
reference to Table 3:
(1) The Channel Control Bit corresponding to Stream 0, Channel 0,
BSTo0_Ch0,
is transmitted on
BCSTo0
and is
advanced, relative to the Frame Boundary, by 10 periods of
C16o
.
(2) The Channel Control Bit corresponding to Stream 28, Channel 0,
BSTo28_Ch0,
is transmitted on
BCSTo0
in
advance of the Frame Boundary by three periods of output clock,
C16o
. Similarly, the Channel Control Bits for
BSTo29_Ch0
,
BSTo30_Ch0
and
BSTo31_Ch0
are advanced relative to the Frame Boundary by three periods of
C16o
, on
BCSTo1
,
BCSTo2
and
BCSTo3
, respectively.
The
BCSTo0-3
outputs data at a constant data-rate of 16.384 Mb/s, independent of the data-rate selected for the
individual output streams,
BSTo0-31
. Streams at data-rates lower than 16.384 Mb/s will have the value of the
respective channel control bit repeated for the duration of the channel. The bit will be repeated twice for 8.192 Mb/s
streams, four times for 4.096 Mb/s streams and eight times for 2.048 Mb/s streams. The channel control bit is not
repeated for 16.384 Mb/s streams.
Examples are presented, with reference to Table 3:
(3) With stream
BSTo4
selected to operate at a data-rate of 2.048 Mb/s, the value of the Channel
Control Bit for
Channel 0
will be transmitted during the
C16o
clock period nos. 2040, 2048, 8, 16, 24, 32,
40 and 48.
(4) With stream
BSTo8
operated at a data-rate of 8.192 Mb/s, the value of the Channel Control Bit for
Channel 1
will be transmitted during the
C16o
clock period nos. 9 and 17.
Allocated Stream No.
Channel No.
2
C16o
Period
1
BCSTo0
BCSTo1
BCSTo2
BCSTo3 16 Mb/s
8 Mb/s
4 Mb/s
2 Mb/s
2039
0
3-1
1
2
3
Ch 0
Ch 0
Ch 0
Ch 0
2040
4
3-3
8
12
16
20
24
5
6
7
Ch 0
Ch 0
Ch 0
Ch 0
2041
2042
2043
2044
2045
2046
9
13
17
21
25
10
14
18
22
26
11
15
19
23
27
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
Ch 0
28
3-2
29
3-2
30
3-2
31
3-2
Table 3 - BCSTo Allocation of Channel Control Bits to the Output Streams
(Non-32 Mb/s Mode)
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相關(guān)代理商/技術(shù)參數(shù) |
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| MT90870AG | 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 12K X 12K/8K X 4K 1.8V/3.3V 272BGA - Trays |
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| MT90871 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Flexible 8K Digital Switch (F8KDX) |
| MT90871AV | 制造商:Microsemi Corporation 功能描述:FLEXIBLE 8K DIGITAL SWITCH 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC DGTL SWITCH F8KDX 196PBGA 制造商:Microsemi Corporation 功能描述:IC DGTL SWITCH F8KDX 196PBGA |
| MT90871AV2 | 制造商:Microsemi Corporation 功能描述:PB FREE FLEXIBLE 8K DIGITAL SWITCH - Bulk 制造商:Microsemi Corporation 功能描述:IC, TDM SWITCH 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC DGTL SWITCH F8KDX 196PBGA 制造商:Microsemi Corporation 功能描述:IC DGTL SWITCH F8KDX 196PBGA |
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