Firstly, The core model, structure module, performance characteristics and JTAG debug interface of the microprocessor were described by this article. Then, the system power supply module, prior to the passage weighing signal and tachometer signal circuits were designed in this paper. Secondly, according to the operational needs of the belt scale system, the external memory circuit and the TFT-LCD touch screen circuit modules were studied. Finally, the high-speed circuit board PCB designed to solve EMC problems. And it described the data collection and weighing controller bus communication test situation and established the communications test platform of Profibus-DP, introduced the test experimental procedures, experiment shows the communication between master and slave test results are correct. The computing speed and accuracy, data processing compared with traditional electronic belt scale, information exchange, integration, reliability and stability will be greatly improved by the advanced embedded technology and so on.


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