USB Host Controller具体分析.pdf

24 1 Vo l . 24 No . 1 2003 1 M I NI - M ICRO SYST EM S Jan . 2003 USB HOST HOST Controller 赵蕴龙　杨孝宗　崔　刚 ( , 15000 1 : U SB 接口被广泛地应用在计算机外设接口地设计中, 尤其是嵌入式系统和穿戴计算机系统. 为了减小系统的 积, 提高系统的集成度, 可以利用System O n Chip 技术将U SB 主机控制器集成在微处理器中, 构成片上系统, 这就 需要自行设计U SB 主机控制器的核( Co re . 本文系统地剖析了U SB 主机控制器的原理和结构, 并针对O HCI 从系统 级上给出了一个典型的U SB 主机控制器的具 实现. : ; ; ; : T P302 : A : 1000 -1220( 2003 01-0054-04 Analysis and Realization of USB HOST HOST Controller ZHA O Y un-long, YA N G Xiao -zong , CU I G ang ( Sc hool of Comp ut er S cience and T echnol ogy , I nst it ute of Te chnol ogy , H arbin 15000 1, Chi na Abstract: U SB is w idely u sed in the designing of co mput er s peripher al int erf aces, especially in embedded sy stem and w ea rable co mput ers system . In or der to reduce t he size o f system s and impro ve t he integr ation lev el of them , w e ca n integ rat e U SB host co nt ro ller into t he CP U by apply ing SO C techno log y. So w e mu st design the U SB host contr oller cor e by our selv es . T his paper analyzes the pr inciple and ar chitecture of U SB ho st contr oller, and g iv es an ideal realiza- tio n o f OHCI fr om t he sy stem lev el . : ; ; ; Key words U SB host contr oller ro ot hub SIE ( 2 U SB Ho st Co nt ro ller U SB , 1 , . Hub U SB ( Per iphera ls N ode . U SB U SB , U SB , , . U SB . U SB 1. U SB . . ,