具有时钟域相关的usb设备

文档序号:1432170 发布日期:2020-03-17 浏览:9次 >En<

阅读说明:本技术 具有时钟域相关的usb设备 (USB device with clock domain correlation ) 是由 R·李 P·沙哈 M·希恩科 H·L·尼尔森 S·罗勒 A·梅拉比 S·穆勒 R·赫尔 于 2018-06-28 设计创作,主要内容包括:提出了与时钟域相关的方法和USB设备。USB设备包括被适配成在第一时钟域中携带信号的至少一条信号线。这些信号是从USB主机接收的。时钟操作第二时钟域。周期性分组检测电路从在第一时钟域中所接收的信号检测丢失的周期性分组。设备控制器基于周期性分组检测电路检测到丢失的周期性分组而将第二时钟域中的USB操作与第一时钟域相关。USB设备包括携带UTMI或ULPI信令的至少一条信号线。USB控制器对来自UTMI或ULPI信令中的分组标识进行解码。与USB控制器分开的周期性分组检测电路对来自UTMI或ULPI信令中的分组标识进行解码。(Methods and USB devices related to a clock domain are presented. The USB device includes at least one signal line adapted to carry a signal in a first clock domain. These signals are received from the USB host. The clock operates a second clock domain. The periodic packet detection circuit detects a missing periodic packet from a signal received in the first clock domain. The device controller correlates USB operations in the second clock domain with the first clock domain based on the periodic packet detection circuit detecting a missing periodic packet. The USB device includes at least one signal line carrying UTMI or ULPI signaling. The USB controller decodes the packet identification from UTMI or ULPI signaling. Periodic packet detection circuitry, separate from the USB controller, decodes the packet identification from UTMI or ULPI signaling.)

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