Design and implementation of multi-channel high speed HDLC data processor

This paper presents the design of a multi-channel high speed HDLC data processor that can processes 128 logic channel HDLC data simultaneously. Its logic function and communication protocol coherence has been verified successfully by a real-time operation system - Vx Works through FPGA. In the system, this multi-channel HDLC processor connects with 8 El physical links, and all 128 logic channel data separated from 256 timeslots of 8 El frames are processed by this single HDLC processor by using time multiplex technology. Compared with other communication chips of the similar type, this circuit structure takes more advantages in chip resources' taking up and channel management.