參數(shù)資料
型號(hào)： 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(yè)數(shù)： 27/86頁(yè)
文件大?。?/td> 2093K
代理商： MT90870
MT90870
Data Sheet
27
Zarlink Semiconductor Inc.
Figure 11 - Backplane and Local Input Bit Delay Timing Diagram for Data Rate of 8 Mb/s
3.3 Output Advancement Programming (Backplane and Local Output Streams)
This feature is used to advance the output channel alignment of individual Local or Backplane output streams with
respect to the frame boundary. Each output stream has its own advancement value which can be programmed by
the output advancement registers. The output advancement selection is useful in compensating for various
parasitic loading on the serial data output pins.
3.3.1 Local Output Advancement Programming
The Local output advancement registers,
LOAR0-15
, are used to control the Local output advancement. The
advancement is determined with reference to the internal system clock rate (131.072 MHz). For 2 Mb/s, 4 Mb/s,
8 Mb/s or 16 Mb/s streams the advancement may be 0, -2 cycles, -4 cycles or -6 cycles, which converts to
approximately 0ns, -15 ns, -30 ns or -45 ns as shown in Figure 12.
3.3.2 Backplane Output Advancement Programming
The Backplane output advancement registers,
BOAR0-31
are used to control the Backplane output advancement.
The advancement is determined with reference to the internal system clock rate (131.072 MHz). For 2 Mb/s,
4 Mb/s, 8 Mb/s or 16 Mb/s streams the advancement may be 0, -2 cycles, -4 cycles or -6 cycles, which converts to
C8i
7
2
3
4
5
6
1
0
BSTi0-31/LSTi0-15
Bit Delay = 0
Ch0
7
4
5
6
Ch1
2
3
1
0
BSTi0-31/LSTi0-15
Bit Delay = 1/4
7
2
3
4
5
6
1
0
BSTi0-31/LSTi0-15
Bit Delay = 1
Ch0
7
5
6
Ch1
2
3
1
0
(Default)
7
2
3
4
5
6
1
0
Ch0
7
4
5
6
Ch1
2
3
1
0
Ch127
Ch127
Ch127
Bit Delay, 1/4
Bit Delay, 1
BSTi0-31/LSTi0-15
Bit Delay = 1/2
7
2
3
4
5
6
1
0
Ch0
7
4
5
6
Ch1
2
3
1
0
Ch127
Bit Delay, 1/2
BSTi0-31/LSTi0-15
Bit Delay = 3/4
7
2
3
4
5
6
1
0
Ch0
7
4
5
6
Ch1
2
3
1
0
Ch127
Bit Delay, 3/4
BSTi0-31/LSTi0-15
Bit Delay = 7
1/2
7
2
3
4
5
6
1
0
Ch127
7
4
5
6
Ch0
2
1
0
Ch126
Bit Delay, 7
1/2
BSTi0-31/LSTi0-15
Bit Delay = 7
3/4
7
2
3
4
5
6
1
0
Ch127
7
4
5
6
Ch0
2
1
0
Ch126
Bit Delay, 7
3/4
FP8i
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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
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