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參數(shù)資料
| 型號： | MT8981D |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Digital Switch(數(shù)字開關(guān)（在微處理器控制下，轉(zhuǎn)換PCM編碼控制的話音或數(shù)據(jù)）) |
| 中文描述： | 數(shù)字開關(guān)（數(shù)字開關(guān)（在微處理器控制下，轉(zhuǎn)換的PCM編碼控制的話音或數(shù)據(jù)）） |
| 文件頁數(shù)： | 8/18頁 |
| 文件大小： | 120K |
| 代理商： | MT8981D |
MT8981D
ISO-CMOS
2-24
Figure 8 - Example Architecture of a Simple Digital Switching System
Controlling
Micro-
Processor
Speech
Switch
-
8981
Control &
Signalling
-
8981
STo0-3
STi0-3
STo0-3
Line Interface Circuit
with Codec (e.g. 8964)
Line 1
Line 128
Line Interface Circuit
with Codec (e.g. 8964)
4
4
4
4
Repeated for Lines
2 to 127
Repeated for Lines
2 to 127
STi0-3
Application Circuit with 6802 Processor
Fig. 10 shows an example of a complete circuit
which may be used to evaluate the chip.
For convenience, a 4 MHz crystal oscillator has been
used rather than a 4.096 MHz clock, as both are
within the limits of the chip’s specifications. The RC
delay used with the 393 counters ensures a
sufficient hold time for the FP signal, but the values
used may have to be changed if faster 393 counters
become available.
The chip is shown as memory mapped into the
MEK6802D3
system.
Chip
correspond to processor addresses 2000-203F.
Delay through the address decoder requires the
VMA signal to be used twice to remove glitches. The
MEK6802D3 board uses a 10K
pullup on the MR
pin, which would have to be incorporated into the
circuit if the board was replaced by a processor.
addresses
00-3F
Figure 9 - Four 8981s Arranged in a Non-Blocking 8 x 8 Configuration
IN 0/3
IN 4/7
8981
#1
STi0/3 STo0/3
8981
#2
STi0/3 STo0/3
8981
#3
STi0/3 STo0/3
8981
#4
STi0/3 STo0/3
OUT 0/3
OUT 4/7
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PDF描述 |
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| MT89L80 | CMOS ST-BUS⑩ FAMILY Digital Switch |
| MT89L80AN | CMOS ST-BUS⑩ FAMILY Digital Switch |
| MT89L80AP | CMOS ST-BUS⑩ FAMILY Digital Switch |
| MT8LDT864 | SMALL-OUTLINE DRAM MODULE |
| MT8LDT864HS | SMALL-OUTLINE DRAM MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8981D-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY Digital Switch |
| MT8981DC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY Digital Switch |
| MT8981DE | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Digital Switch |
| MT8981DE1 | 制造商:Microsemi Corporation 功能描述:SWIT FABRIC 128 X 128 5V 40PDIP - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TDM/TSI SWITCH 128X128 40PDIP 制造商:Microsemi Corporation 功能描述:IC TDM/TSI SWITCH 128X128 40PDIP |
| MT8981DL | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY Digital Switch |
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