关键词:USB PDIUSBD12 K9F2808 移动闪存
Abstract
USB (Universal Serial Bus ) is a kind of common serial bus . It is a kind of fast , flexible bus interface . Compared with other communication interface, the greatest characteristic of USB interface is easy to use, this is a main design object of USB too. As a kind of high-speed bus interface, USB is suitable for many kinds of apparatus such as digital camera , MP3 broadcaster , high-speed data gather the apparatus etc.. Easy to use , display interface support hot to insert , draw in USB , and all disposition course is finished automatically by the system still, do not need users to intervene.
This thesis introduces USB (the common serial bus ) apparatus of large memory briefly , provide USB control PDIUSBD12 and flashing memory principle block diagram of K9F2808 , take these two chips as an example , design circuit diagram to store the apparatus, list the procedure flow diagram finally and debug .
Have mainly studied several following respects in thesis:
①USB system enumerates the realization of the course.
②K9F2808 data read and written and controlled.
③The file system is realized on K9F2808.
④Draw whole circuit diagram and compile corresponding all part of procedures.
This design mainly regards PDIUSBD12 and K9F2808 chip research as the core. Mainly structure , interface of USB and bus of USB., agreement of USB and file of FAT16/32 , systematic structure and every relevant source program debug and odd major part of running etc