MT90840集成电路（IC）的电信规格书PDF中文资料

Functional Description

Real time multimedia applications require the transmission of mixed voice and data transmission into the same integrated network and transmission media. The network must simultaneously ensure that data (at N x 64 kbit/s) maintains time slot sequence integrity and provide constant delay through the switch.

特性 Features

• Time-slot interchange function between 8 pairs of ST-BUS/GCI/MVIP streams (512 channels) and a Parallel Data Port (PDP)

• Supports star, point to point connections and unidirectional or bidirectional ring topologies for distributed systems

• Input to Output Bypass function with minimum delay for shared ring applications

• Provides an internal latency adjustment buffer for ring applications

• Parallel port data rates up to 19.44Mbyte/s

• Programmable data rates on the serial port side (2.048 Mb/s, 4.096 Mb/s or 8.192 Mb/s)

• Unidirectional Parallel switching mode for up to 2430 channels non-blocking

• Per-channel direction control on the serial port side

• Per-channel message mode and highimpedance control on both parallel and serial port sides

• 8-bit multiplexed port compatible with Intel and Motorola microcontrollers

• Guarantees frame integrity when switching wideband channels such as ISDN H0 channel

• Provides external control lines allowing the fast parallel interface to be shared with other devices

• Special diagnostic alarm functions for statistical analysis

• JTAG boundary scan

Applications

• Bridging ST-BUS/MVIP buses to high speed Time Division Multiplex backplanes at SONET rates (STS-1/3)

• High speed isochronous backbones for distributed PBX and Local Area Network systems

• Switch platforms of up to 2430 channels with guaranteed frame integrity for wideband channels

• Serial bus control and monitoring

• Data multiplexer

• High speed communications interface

• Isochronous switching/multiplexing to support IEEE 802.9 standards