(China Ordnance Industry Test and Testing Institute， Huayin 714200， China)
Abstract： At present, NAND Flash memory is mostly used in the design of high-speed and large-capacity storage device. Aiming at the shortcomings of serial port detection and data reading and writing methods, such as slow detection speed and long waiting time, a NAND Flash detection and control method based on USB2.0 bus was proposed. The communication and control circuit is designed by using FPGA logic control function and high-speed USB interface chip, and the command and operation control of Flash is realized by PC software. The user can complete the reading and writing, erasing detection and bad block calibration of NAND Flash through PC application program. The experimental results show that the method is fast, flexible, accurate and effective in reading, writing, erasing and bad block calibration, and can be widely used in the design and development of storage test devices.
