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本文以Ｉｎｔｅｌ８２７４芯片的应用为例，着重于ＨＤＬＣ通信的介绍，同时指出了８２７４芯片在软硬件设计中应注意的问题，最后给出了该芯片用于ＨＤＬＣ查询方式串行数据收发实例。
In this paper, the application of Intel8274 chip is taken as an example, the introduction of HDLC communication is pointed out. At the same time, the problems that 8274 chip should pay attention to in hardware and software design are pointed out. Finally, the example of the chip serial data transceiver for HDLC query is given.