USBU

USB1.1 Bulk-Only U

USB1.1

1.1 Intel(USB) (),PCPC//USB

()(//PDA)PCUSBPC

1.2 USB USBPCUSB 12M PC PC

1.3 (USB)12MUSBUSB

1.4 USB USB USB USB USB USBUSB USB USB USB USBUSB

1.5 USB USBUSBUSBUSB3-1USB

1.6 USB USB: USB; ISDN USBUSB USB USB

1.7 USB1-2 USB12Mbps 1.5Mbps

EMIUSB()NRZI VBUSGND VBUS+5VUSBIR drop

1.8 USB(Universal Serial Bus USBUSB USB MP3 USB USBUSB(token packet)USB

USBUSBUSBUSB

2.1 Bulk-OnlyUSB USB 1. USB Mass Storage Class Control/Bulk/Interrupt (CBI) Transport 2. USB Mass Storage Class Bulk-Only Transport 3. USB Mass Storage Class ATA Command Block 4. USB Mass Storage Class UFI Command Specification Bulk-Only

//USBBulk- OnlyBulk//CBIControl/Bulk/Interrupt //UFI USBUFISFF-8070iSCSI-21912

2.2USBDevice.USB Configuration.USB Interface. Bulk-Only Endpoint. USB Bulk-In Bulk-Out

Bulk-InBulk-OutString.

2.2.1 Device Descriptor USBInterface Descriptor

2.2.2

2.2.3 Bulk-OnlyBulk-Only3

bInterfaceSubClass

2.2.4 Endpoint Descriptors 3Bulk-InBulk-Out. USBEndpoint 0Bulk-In

Bulk-Out

2.3 2.3.1Command Block Wrapper(CBW) Command Status Wrapper(CSW) Data-In Data-Out Device Request

2.3.2 Bulk-OnlyBulkSTALLReset Get Max LUN //Bulk

Bulk CBW Data-Out Data-InCSW CBWData-OutData-InCSWCSWBulk-OnlyCBWCBWCSW

2.3.2.1:CBW CBWCommand Block WrapperBulk-Out31

dCBWSignature: CBW43425355hCBWUSBLSBMSB4dCBWTag: Command Block TagUSBCSWdCSWTag4dCBWDataTransferLength: 4

bmCBWFlags: 1D7D7=0D7=1D60D5D00bCBWLUN: LUN10bCBWCBLength: CBWCB11601h10hCBWCB:1616

2.3.2.2:CSW CSWCommand Status Wrapper13

dCSWSignature: CSW53425355hCSWUSBLSBMSB4dCSWTag: Command Status TagdCBWTag4dCSWDataResidue: dCBWDataTransferLength4

bCSWStatus: 0

: Bulk-Out CBW CBW311Fh dCBWDataTransferLength Bulk-InCSWCSW 13Dh

2.4USB USB(Default Control Pipe)SetupSetup

2.5USB

2.6USB 01USB 02HubHubD+D- 15K D+() /D-1.5K Hub 03 HubHub Hub Get_Port_StatusHub Hub

04Hub Hub Set_Port_FeatureHub HubUSB(D+D- )10ms. 05Hub Get_Port_Status Hub USB Register , Endpoint 0 06Hub Hub

02 Get_Port_Status07Get_Descriptor 00 08 Set_Address

09 Get_Descriptor Endpoint 0 10

2.7 SCSI : CBW CBWCB Command Block DescriptorSCSI-2 6 10 12 Microsoft Windows 12

Operation Code: 3 Group Code8 8 5 Command Code32 Logicol unit Number SCSI1 Logical block address 2 34 5 Transfer length Write Parameter list length Mode Sense Allocation length

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