公开(公告)号：US20170149638A1

公开(公告)日：2017-05-25

申请号：US15381642

申请日：2016-12-16

Applicant: NetApp, Inc.

Inventor： Bryan J. Gielarowski ,  Richard M. Strong ,  Hor-Lam Cheuk

IPC: H04L12/26 ,  H04L5/14

CPC classification number: H04L43/0811 ,  H04L5/14 ,  H04L41/0631 ,  H04L43/50 ,  H04L69/324

Abstract: Individual wire defects in a data transfer/communication system that employs differential signaling can be detected during connectivity verification of a link prior to link training by individually disconnecting wires by wire polarity and testing the link. For example, the positive transmit wire of a lane may be verified by disconnecting the negative transmit wire of the lane and performing link connectivity verification. If the link passes connectivity verification, then the positive transmit wire of the lane is functioning normally. Connectivity of the negative transmit wire of the lane may then be verified by disconnecting the positive transmit wire of the lane and determining if the passes the connectivity verification

公开(公告)号：US09544209B2

公开(公告)日：2017-01-10

申请号：US14665767

申请日：2015-03-23

Applicant: NetApp, Inc.

Inventor： Bryan J. Gielarowski ,  Richard M. Strong ,  Hor-Lam Cheuk

IPC: H04L12/26 ,  H04L5/14

CPC classification number: H04L43/0811 ,  H04L5/14 ,  H04L41/0631 ,  H04L43/50 ,  H04L69/324

Abstract: Individual wire defects in a data transfer/communication system that employs differential signaling can be detected during connectivity verification of a link prior to link training by individually disconnecting wires by wire polarity and testing the link. For example, the positive transmit wire of a lane may be verified by disconnecting the negative transmit wire of the lane and performing link connectivity verification. If the link passes connectivity verification, then the positive transmit wire of the lane is functioning normally. Connectivity of the negative transmit wire of the lane may then be verified by disconnecting the positive transmit wire of the lane and determining if the passes the connectivity verification.

Abstract translation: 在链路训练之前的链路的连接验证期间，可以通过线路极性单独断开线路并测试链路来检测采用差分信号的数据传输/通信系统中的单独的线路缺陷。 例如，可以通过断开车道的负发射线并执行链路连通性验证来验证车道的正发射线。 如果链路通过连通性验证，则该通道的正传输线正常工作。 然后可以通过断开通道的正传输线并确定是否通过连通性验证来验证通道的负发射线的连接。

公开(公告)号：US20160285715A1

公开(公告)日：2016-09-29

申请号：US14665767

申请日：2015-03-23

Applicant: NetApp, Inc.

Inventor： Bryan J. Gielarowski ,  Richard M. Strong ,  Hor-Lam Cheuk

IPC: H04L12/26 ,  H04L5/14

CPC classification number: H04L43/0811 ,  H04L5/14 ,  H04L41/0631 ,  H04L43/50 ,  H04L69/324

Abstract: Individual wire defects in a data transfer/communication system that employs differential signaling can be detected during connectivity verification of a link prior to link training by individually disconnecting wires by wire polarity and testing the link. For example, the positive transmit wire of a lane may be verified by disconnecting the negative transmit wire of the lane and performing link connectivity verification. If the link passes connectivity verification, then the positive transmit wire of the lane is functioning normally. Connectivity of the negative transmit wire of the lane may then be verified by disconnecting the positive transmit wire of the lane and determining if the passes the connectivity verification.

Abstract translation: 在链路训练之前的链路的连接验证期间，可以通过线路极性单独断开线路并测试链路来检测采用差分信号的数据传输/通信系统中的单独的线路缺陷。 例如，可以通过断开车道的负发射线并执行链路连通性验证来验证车道的正发射线。 如果链路通过连通性验证，则该通道的正传输线正常工作。 然后可以通过断开通道的正传输线并确定是否通过连通性验证来验证通道的负发射线的连接。

公开(公告)号：US20160282414A1

公开(公告)日：2016-09-29

申请号：US14665621

申请日：2015-03-23

Applicant: NetApp, Inc.

Inventor： Bryan J. Gielarowski ,  Hor-Lam Cheuk ,  Richard M. Strong

IPC: G01R31/317 ,  G01R31/3177

CPC classification number: G01R31/31855 ,  G01R31/2815 ,  G01R31/3171 ,  G01R31/31716 ,  G01R31/31723 ,  G01R31/318586

Abstract: JTAG testing can be facilitated by providing loopbacks in a circuit that lacks a JTAG interface. A loopback may be created by connecting a receiving pin to a transmit pin of a circuit that lacks the JTAG interface. The loopback would cause a test value received in the circuit to be transmitted back out of the circuit. Therefore, a test value may be sent from an integrated circuit with a JTAG interface and then read back at the same integrated circuit with the JTAG interface. Using a loopback allows the interconnects between two integrated circuits to be tested despite one integrated circuit lacking a JTAG interface. Using the loopback also frees up pins for one of the integrated circuits that would otherwise be used by the JTAG interface.

Abstract translation: 可以通过在缺少JTAG接口的电路中提供环回来方便JTAG测试。 可以通过将接收引脚连接到缺少JTAG接口的电路的发送引脚来创建环回。 环回将导致在电路中接收到的测试值被传回电路。 因此，可以从具有JTAG接口的集成电路发送测试值，然后在与JTAG接口相同的集成电路上回读。 尽管一个集成电路缺少JTAG接口，但是使用环回允许测试两个集成电路之间的互连。 使用环回也可以释放JTAG接口将使用的集成电路之一的引脚。