USB Complete fourth- P8 docx

... in complete split) IN device data, NAK, STALL, ERR (from hub in complete split) host ACK PING (high speed only) no data packet – device ACK, NAK, STALL Chapter 2 46 5RNKV6TCPUCEVKQPU A USB ... USB 2.0 hub communicates with a USB 2.0 host at high speed unless a USB 1.x hub is between the host and hub. When a low- or full-speed device is attached to a USB 2.0 hub, the hub co...

Ngày tải lên: 04/07/2014, 07:20

... bits are tenths, and the final four bits are hundredths. USB 1.1 is 0110h (not 0101h). USB 2.0 is 0200h. USB 3.0 is 0300h. A device with bcdUSB = 0210h or higher must support the BOS descriptor. ... standard USB descriptors. The device must store the contents of its descriptors and respond to requests for the descriptors. 6[RGU Table 4-1 lists the descriptors defined in the USB 2.0...

Ngày tải lên: 04/07/2014, 07:20

... use four USB- specific instructions: USBInit initializes the USB port. USBService monitors the bus status and manages low-level USB communi- cations. A PICBASIC PRO program must call USBService ... C8051F34x low/full Standard Microsystems Corporation (SMSC) USB2 005, USB2 22x full, full/high Texas Instruments TUSB3210/3410 full TUSB6250 full/high Microchip PIC18 Microchip Technology...

Ngày tải lên: 04/07/2014, 07:20

... also write to cards.) USB enters the picture because some CCIDs have USB interfaces for communicating with USB hosts. An ICC device (ICCD) is a smart card that has its own USB interface and thus doesn’t ... Corporation has the AU9525 USB smart card reader controller with a full-speed USB interface. Winbond Electronics Corporation’s W81E381 is an 8052-compatible micro- controller...

Ngày tải lên: 04/07/2014, 07:20

... supports USB 1.0, so interrupt OUT transfers aren’t supported and all host-to-device reports must use control transfers. A HID may be just one of multiple interfaces in a device. For example, a USB speaker ... 64 kB/s. High-speed and SuperSpeed endpoints support faster rates, but to comply with the USB 2.0 and USB 3.0 specifications, the endpoints in the default interface should reque...

Ngày tải lên: 04/07/2014, 07:20

Ngày tải lên: 04/07/2014, 07:20

... Systems’ Root 2 USB Test Host emulates a USB host and enables you to specify traffic to generate on the bus, control the bus voltage, and measure bus current. The USB- IF provides a free USB 2.0 Single ... can prevent overflow errors. One USB cable connects the Explorer to the PC running the Explorer’s Visual USB Analysis software. The PC detects the Explorer as a USB device that...

Ngày tải lên: 04/07/2014, 07:20

... USB host can have a built-in Wireless USB interface or a wired connection to a USB device that functions as a host wire adapter (HWA) that communicates via Wireless USB. In a similar way, a USB ... WirelessUSB system consists of a WirelessUSB bridge and one or more Wire- lessUSB devices (Figure 19-11). The bridge translates between USB and the wireless protocol and medium. The Wire...

Ngày tải lên: 04/07/2014, 07:20

... NET2272 . . . . . . . . . . . . . . . . . . . . . . . . . 157 FTDI USB UART and USB FIFO. . . . . . . . . . . . . . . . . . . . 159 USB Complete: The Developer’s Guide, Fourth Edition by Jan Axelson Copyright ...  Microchip PIC18F4550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 Cypress EZ -USB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 AR...

Ngày tải lên: 04/07/2014, 07:20

... should use a USB interface? Find out whether your device should use USB or another interface. If the choice is USB, you’ll learn how to decide which of USB s four speeds—including USB 3.0’s SuperSpeed—and ... other USB devices? Find out how to develop a host for an embedded system or a USB On-The-Go device that can function as both a USB device and a limited-capability host tha...

Ngày tải lên: 04/07/2014, 07:20