公开(公告)号：US6158032A

公开(公告)日：2000-12-05

申请号：US49170

申请日：1998-03-27

申请人： Guy Richard Currier ,  Leland Leslie Day ,  Steven Michael Douskey ,  Paul Allen Ganfield ,  James Maurice Wallin

发明人： Guy Richard Currier ,  Leland Leslie Day ,  Steven Michael Douskey ,  Paul Allen Ganfield ,  James Maurice Wallin

IPC分类号： G01R31/3185 ,  G01R31/28

CPC分类号： G01R31/318536

摘要： A data processing system, circuit arrangement, program product, and method thereof utilize a multi-path scan interface that is capable of providing multiple scan paths into a plurality of scan ring segments in an integrated circuit device. The multi-path scan interface utilizes one or more multiplexers coupled between scan in and scan out ports and at least one scan ring segment to provide alternate scan paths depending upon select signals supplied to each multiplexer. With such a configuration, a standardized scan interface may developed for interfacing with a wide variety of scan ring segments, and optionally, for multiple purposes. As a result, the amount of custom circuitry necessary to provide access to scan ring segments is significantly reduced.

摘要翻译： 数据处理系统，电路装置，程序产品及其方法利用能够向集成电路装置中的多个扫描环段提供多条扫描路径的多路径扫描接口。 多路径扫描接口利用耦合在扫描入口和扫描端口中的一个或多个多路复用器和至少一个扫描环段，以根据提供给每个多路复用器的选择信号提供交替的扫描路径。 利用这种配置，可以开发用于与各种各样的扫描环段对接的标准化扫描界面，并且可选地，出于多个目的。 因此，提供访问扫描环段所需的定制电路的量显着减少。

公开(公告)号：US6115763A

公开(公告)日：2000-09-05

申请号：US35490

申请日：1998-03-05

申请人： Steven Michael Douskey ,  Michael Charles Cogswell ,  Guy Richard Currier ,  John Robert Elliott ,  Sharon Denos Vincent ,  James Maurice Wallin ,  Paul Leonard Wiltgen

发明人： Steven Michael Douskey ,  Michael Charles Cogswell ,  Guy Richard Currier ,  John Robert Elliott ,  Sharon Denos Vincent ,  James Maurice Wallin ,  Paul Leonard Wiltgen

IPC分类号： G06F11/267 ,  G06F13/00 ,  G01R31/28 ,  G06F11/00

CPC分类号： G06F11/267

摘要： A data processing system, integrated circuit device, program product, and method thereof utilize a service interface to provide external access to a plurality of cores integrated into an integrated circuit device. The service interface, which may be utilized to perform external data transfer through a service access port in connection with a predetermined service operation, is separate from any function interface that is utilized during regular operation of the device. The service interface includes a plurality of core interface units integrated with selected cores on the device and coupled to the service access port through a master interface unit that is configured to request at least one of the core interface units to initiate execution of a predetermined service operation. As such, a multitude of service operations may be initiated in any number of the cores through a common service access port without occupying a large number of I/O pins and without necessitating interruption of the regular operation of the device.

摘要翻译： 数据处理系统，集成电路装置，程序产品及其方法利用服务接口来提供对集成到集成电路装置中的多个核心的外部访问。 可以用于通过与预定服务操作相关联的服务访问端口执行外部数据传输的服务接口与在设备的常规操作期间被利用的任何功能接口分离。 服务接口包括多个核心接口单元，与设备上的选定核心集成，并通过主接口单元耦合到服务接入端口，该主接口单元被配置为请求至少一个核心接口单元启动预定服务操作 。 因此，可以通过公共服务访问端口在任意数量的核心中启动多个服务操作，而不占用大量I / O引脚，并且不需要中断设备的常规操作。