MODE_Switch1Processing multi-Interrupt request needs to set the priority of these Interrupt requests.
The IRQ flags of the 7 Interrupt are controlled by the Interrupt event occurring. But the
IRQ flag set doesn t mean the system to execute the Interrupt vector. The IRQ flags can be
triggered by the events without Interrupt enable. Just only any the event occurs and the
IRQ will be logic "1".
USB海量存儲設備類規(guī)范包括四個獨立的子類規(guī)范：(ATA command的那個沒有)
①USB Mass Storgage Class Control/Bulk/Interrupt(CBI)Transport
②USB Mass Storage Class Bulk-Only Transport
③USB Mass Storage Class ATA Command Block
④USB Mass Stroage Class UFI Command Specification。
前兩個子規(guī)范定義了數(shù)據(jù)/命令/狀態(tài)在USB上的傳輸方法。
Bulk-Only傳輸規(guī)范僅僅使用Bulk端點傳送數(shù)據(jù)/命令/狀態(tài)，
CBI傳輸規(guī)范則使用Control/Bulk/Interrupt三種類型的端點進行數(shù)據(jù)/命令/狀態(tài)傳送。
后兩個子規(guī)范定義了對存儲介質的操作命令。
ATA 命令規(guī)范用于硬盤。
UFI命令規(guī)范是針對USB移動存儲而制定的，實際上UFI命令格式是基于SFF-8070i和SCSI-2規(guī)范，總共定義了19個12字節(jié)長度的操作命令。
