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參數(shù)資料
| 型號： | IMP8980D |
| 廠商： | IMP INC. |
| 英文描述： | PCM Digital Switch |
| 中文描述： | PCM數(shù)字開關(guān) |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 136K |
| 代理商： | IMP8980D |
1
IMP8980D
PCM Digital Switch
Figure 1 Functional Block Diagram
General Description
This CMOS device is designed for
switching PCM-encoded voice or data,
under microprocessor control, in a modern
digital exchange, PBX or Central Office. It
provides simultaneous connections for up
to 256 64kbit/s channels. Each of the eight
serial inputs and outputs consist of 32
64kbit/s channels multiplexed to form a
2048kbit/s ST-BUS stream. In addition,
the IMP8980D provides microprocessor
read and write access to individual
ST-BUS (Serial Telecom Bus) channels.
Features
ST-BUS compatible
8-line x 32-channel inputs
8-line x 32-channel outputs
256 ports non-blocking switch
Single power supply (+5V)
30mW power consumption
Microprocessor-control interface
Pin-compatible with Mitel MT8980
Functional Description
The ST-BUS architecture can be used
both in software-controlled digital voice
and data switching.
The ST-Bus serial streams operate
continuously at 2048kbit/s and are
arranged in 125
μ
s wide frames which
contain 32 8-bit channels.
The IMP8980D can switch data from
channels on ST-BUS inputs to channels on
ST-BUS outputs and simultaneously
allows its controlling microprocessor to
read channels on ST-BUS inputs or write
to channels on ST-BUS outputs (Message
Mode). To the microprocessor, the
IMP8980D looks like a memory periph-
eral. The microprocessor can write to the
IMP8980D to establish switched connec-
tions between input ST-BUS channels and
output ST-BUS channels or to transmit
messages on output ST-BUS channels. By
reading from the IMP8980D, the micro-
processor can receive messages from
ST-BUS input channels or check which
Serial
to
Parallel
Converter
Frame
Control Register
Control Interface
MUX
CMemory
Parallel
to
Serial
Converter
ODE
STi0
STi1
STi2
STi3
STi4
STi5
STi6
STi7
STo0
STo1
STo2
STo3
STo4
STo5
STo6
STo7
DS
CS
R/W
A5/
A0
DTA
D7/
D0
CSTo
C4i
F0i
V
DD
V
SS
Data
Memory
ISO 9001 Registered
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IMP8980DC | 制造商:IMP 制造商全稱:IMP 功能描述:PCM Digital Switch |
| IMP8980DE | 制造商:IMP 制造商全稱:IMP 功能描述:PCM Digital Switch |
| IMP8980DL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC |
| IMP8980DP | 制造商:A1PROS 制造商全稱:A1 PROs co., Ltd. 功能描述:PCM Digital Switch |
| IMP8980DP/T | 制造商:IMP 制造商全稱:IMP 功能描述:PCM Digital Switch |
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