IMP8980DP datasheet(1/14 Pages) A1PROS

部件名	IMP8980DP

功能描述	PCM Digital Switch

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制造商	A1PROS [A1 PROs co., Ltd.]

网页	http://www.a1pros.co.kr

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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

µs 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

Counter

Control Register

Control Interface

Output

MUX

Connection

Memory

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

VDD

VSS

Data

Memory

ISO 9001 Registered

®

类似零件编号 - IMP8980DP

制造商	部件名	数据表	功能描述
IMP, Inc	IMP8980DP	136Kb / 14P	PCM Digital Switch
IMP, Inc	IMP8980DP/T	136Kb / 14P	PCM Digital Switch

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