The main one is to initiate a lot of data transfers on the MFC, and then let the MFC take control of deciding the ordering for processing.
主要方法是在MF c上启动许多数据传输，然后让MFC决定处理的次序。
Device drivers use these routines to request various types of data transfers (control, interrupt, bulk, or isochronous).
设备驱动程序使用这些例程来请求各种类型的数据传输(control、interrupt、bulk或isochronous)。
Control transfers: These are short data packets for device control and configuration, particularly at attach time.
控制传输：这些是一些短的数据包，用于设备控制和配置，特别是在设备附加到主机上时。
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