The mufti-channel HDLC controller of the present invention is used for realizing butt joint between the mufti-channel HDLC and the system, organizing data in manner of mufti-channel HDLC, then transmitting the data through the TDM interface, and connecting with the memory of the system which using the HDLG controller through the AHB bus interface at the same time. In the present invention, a part of temporary parameters that the HDLC controller needs are placed outside of the HDLC controller, and calling the parameters from the outside through inner logic. The present invention adopts non-RSIC design, all circuit realization, and needn't to adopt general RSIC, and it sets special interface for the HDLC, the difficulty of the setting is small; the present invention stores the temporary parameters that the HDLC controller needs for operation into the memory, which saves the hardware resource of the mufti-channel HDLC controller itself. Moreover, for the transmitting and receiving of the mufti-channel data of the mufti-channel HDLC controller, all channels of one mufti-channel HDLC controller share a set of controlling logic, which also saves many hardware resources.
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