Design and realization of Digital Informational System

The Digital Informational System (DIS) is a portable, handheld, battery-operated data collection device for collecting "real-world" data, In this paper the design and realization of the DIS in hardware and software are introduced. In core module there are three part: embedded CPU (S3C44B0X), SDRAM (HY57V641620HG) and FLASH (28F320C3BA100) form handheld instrument basic system. The popular ARM microprocessor was applied to the DIS. Combining the powerful data calculation and control capability of ARM, the kinds more than 40, analog and digital sensor can be connected. The man-machine interaction is realized from the 160 x 160LCD and the keyboard circuit; the low power consumption and high reliably power supply is designed used in the special power supply chip; and the general functions are programmed. The principle graphic of hardware design based on S3C44B0X is presented and the analog test circuit and cycle/frequency circuit and software of measurement and control are expatiated in detail.