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    • 1. 发明授权
    • Enabling on-chip features via efuses
    • 通过efuses实现片上功能
    • US07795899B1
    • 2010-09-14
    • US12420056
    • 2009-04-08
    • Gregory F. GrohoskiChristopher H. OlsonThomas Alan ZiajaLawrence A. Spracklen
    • Gregory F. GrohoskiChristopher H. OlsonThomas Alan ZiajaLawrence A. Spracklen
    • H03K19/00
    • G11C17/16G11C7/1045G11C17/165G11C17/18
    • Systems and methods for enabling on-chip features via efuses. A system comprises an electronic fuse (Efuse) array (EFA) coupled to each features capability register (FCR) within an instantiated computational block. The EFA comprises a plurality of rows wherein programming an row comprises blowing one or more Efuses of the row. A valid row comprises programmed Efuses corresponding to one or more on-chip enabled features. The EFA is further configured to prevent enabling of disabled on-chip features from occurring subsequent to a predetermined point in time, such as the time of shipping the chip to the field for use by end-users, by establishing a particular default state for electronic fuses and rendering unusable any unprogrammed entries of the EFA. In one embodiment, some features correspond to on-chip hardware cryptographic acceleration. By preventing the ability to re-enable these features after shipping, it is possible to send semiconductor chips to foreign countries with only predetermined features enabled and no threat of disabled features being later enabled.
    • 通过efuses启用片上功能的系统和方法。 系统包括耦合到实例计算块内的每个特征能力寄存器(FCR)的电子熔丝(Efuse)阵列(EFA)。 EFA包括多行,其中编程行包括吹送行的一个或多个Efus。 有效的行包括对应于一个或多个片上使能特征的编程的Efuses。 EFA还被配置为防止在预定时间点之后发生禁用的片上特征的启用,诸如将芯片运送到终端用户使用的领域的时间,通过建立电子的特定默认状态 保险丝和使得无法使用任何未编程的全民教育条目。 在一个实施例中,一些特征对应于片上硬件加密加速。 通过防止在运输后重新启用这些功能的能力,可以将半导体芯片发送到国外,只启用预定功能,并且不会启用禁用功能的威胁。