RAN Zi-bo (冉自博), MA You-chun (马游春)， LIU Hong-yu (刘红雨)
(Department of Electronic Science and Technology, North University of China, Taiyuan 030051 , China)
Abstract： By using enhanced reduced instruction set computing（RISC） architecture and carrying out powerful instructions in a single clock cycle, the ATmega128 achieves the data transmission speed of about one MIPS per MHz. With this advantage, the designer can eliminate the contradiction between power consumption and processing speed in data acquisition system based on U disk. In this paper, a U disk recorder for mass data storage is designed. It consists of a microcontroller ATmega128 and a U disk management chip CH376. ATmega128 with 4 KB SRAM provides enough buffer memory and CH376 enables U disk files to be written or read in sector size. Based on analysis of the system, the hardware and software designs are given. With the designed data acquisition system, data transmission speed can reach 460 KB per second. The experimental results show that the designed system has higher efficiency and reliability than the traditional ones when writing or reading U disk files.
Key words： ATmega128; U disk; CH376
CLD number： TP274 Document code： A
Article ID： 1674-8042(2013)04-0330-05 doi： 10.3969/j.issn.1674-8042.2013.04.006
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