采用SD卡作为汽车导航仪系统的外扩存储器。根据SD卡的硬件特性,设计了CPU与SD卡的电路连接。并分析了Windows CE下流接口驱动的特点,以及SD卡驱动程序与中断的关系,提出了基于Windows CE下的SD卡驱动的实现方法。SD card is used as external memory in car navigator system in this article. The electrical connection between CPU and SD card is designed according to the speciality of SD card. And the features of stream interface drivers based on Windows CE and the relation between the interruption and the driver of SD card is analysed, then the implementation of the SD card driver is presented
