1、USB Controller是USB控制器，控制所有usb接口的开关，默认是“enable”状态。若关闭状态的话，所有的USB设备都不可以使用了。2、USB Device Legacy Support是指BIOS开机加载USB设备的驱动,一般指USB键盘、鼠标，默认设置为“enable”状态。3、USB Controller的权限大于USB Device Legacy Support。USB Contr...
Output Type 源电流漏电流 Current Drive Single 24 mA Current Drive All 576 mA Maximum Voltage Range 0 V - 5 V Counters / Timers Watchdog Timer 是 Counters 4 Buffered Operations 是 Debouncing / Glitch Removal 是 Max Source Frequency 100 MHz Pulse Generation 是 Size 32 bits Timebase Stability...
USB Type C is arguably the most popular USB connector. It is also the most recent as it was introduced in 2014. Due to its small size, it easily fits into the smallest peripherals we use today, like smartphones, Bluetooth speakers, etc. It is a standard for connecting and charging devic...
In addition, it can also detect the hard disk's firmware version, serial number, capacity, cache size, and current Ultra DMA mode, etc. H2testw.exe (Type-A USB3.0 interface test speed)Tool to test SSD reliability and average read and write speed...
int size2; struct usb_descriptor_header *header; int len, retval; u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES]; unsigned iad_num = 0; memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE); if (config->desc.bDescriptorType != USB_DT_CONFIG || config->desc.bLength < USB_DT_...
bDescriptorType: 0x01 (DEVICE) bcdUSB: 0x0200 bDeviceClass: Vendor Specific (0xff) bDeviceSubClass: 255 bDeviceProtocol: 255 bMaxPacketSize0: 64 idVendor: Marvell Semiconductor, Inc. (0x1286) idProduct: Unknown (0x812a) bcdDevice: 0x0000 ...
可以看到相比于普通的usb3.0 A座,typec多出了一组tx,rx,以及vconn和cc。其中具体使用情况: 1)多出的tx,rx可以在gen1或gen2中做usb多路输出,可实现数据吞吐量翻倍,同时也可以复用为DisplayPort接口,使得typec可以做视频输出 2)vconn为typec有源线缆的e-mark供电,进一步可以识别线材的供电能力 ...
Industry's most complete portfolio of USB Type-C<sup>®</sup> and USB Power Delivery (PD) products
USB Type-A Edgar Cervantes / Android Authority USB Type-A connectors are extremely common and will likely be at one end of many USB cables nowadays. You can connect smartphones, cameras, keyboards, and more to computers to transfer data, or plug intowall chargersto charge these gadgets with...
Endpoint Descriptor: bEndpointAddress: 0x02 Transfer Type: Bulk wMaxPacketSize: 0x0040 (64) bInterval: 0x0A 4.3、USB枚举实例 对2440的USB HOST进行初始化完毕(主要包括对符合OHCI规范的寄存器的初始化—总线复位、中断使能、清除中断标志、电源管理、内存指针寄存器的初始化,各种数据结构的初始化等),等待USB设...