数字交换芯片MT90826及其应用

MT90826芯片是MITEL公司生产的大容量数字交换器件，单片可实现4096×4096通道的无阻塞交换，可编程建立在每一个通道基础上、附带不同通过延时的时隙交换，利用该器件的组合可构成更大容量的交换网络或交叉连接矩阵。该器件可有效解决传统交换机采用多个存储器及控制集成电路所构成的交换网络系统存在的生产成本高、调试困难、稳定性差等问题。文章介绍了MT90826芯片的内部结构、原理及时序关系，并给出了控制软件设计，其编程思路可拓展到MITEL公司同系列的其他数字交换芯片。

Introduction and Application of the Digital Switch Chip MT90826

The MT90826 digital switch of MITEL Co. has a non-blocking switch capacity of 4,096×4,096 channels and the combination of the MT90826 is used to make more great capacity switching network or cross connects. The device has many features that are programmable on a per stream or per channel basis, including message mode, input offset.The MT90826 is applied in medium switching platforms to advance operating costs, debug and stability of traditional switch.The introduction of the MT90826 which includes function, work principle and interface timing is present in this paper, with control software design given.With regard to this programming algorithm, it should be easy to program the other digital switching chips of the same MITEL Co. series.