According to the requirements of modularization and standardization

this paper presents a new method for designing LXIbus interface circuit of general purpose for High Frequency Ground Wave Radar（HF GWR） based LXIbus.The design was on the basis of ADSP-21062 and DM9000A

making use of the dual-ported RAM as buffer between LXIbus and function circuit

adopting full-duplex mode

employing bidirectional interrupts to exchange mass data in packets.Comparing to other traditional bus

LXIbus has showed several advantages such as long-distance operation

smaller physical size

cost-savings

and so on.The measurement results showed that the average data transfer speed of this interface was about 12 Mb/s.It meets the needs of the HF GWR real-time measurement.