MULTI-CYCLE DELAY FOR COMMUNICATION BUSES
    62.
    发明申请
    MULTI-CYCLE DELAY FOR COMMUNICATION BUSES 有权
    多通道延时通讯

    公开(公告)号:US20150095535A1

    公开(公告)日:2015-04-02

    申请号:US14041818

    申请日:2013-09-30

    Applicant: Apple Inc.

    CPC classification number: G06F13/4068 G06F9/3869 G06F13/4217 G06F2213/0038

    Abstract: A system is disclosed that may compensate for bus timing that may vary over operating conditions of a bus. The system may include a communication bus, a first functional unit configured to transmit data via the communication bus, and a second functional unit configured to receive data via the bus. The first functional unit may transmit a first value via the communication bus to the second functional unit. The first functional unit may be further configured to assert a data valid signal responsive to a determination that a first time period has elapsed since the transmission of the first data value. The second functional unit may be configured to receive the first data value and sample the first data value dependent upon the data valid signal.

    Abstract translation: 公开了可以补偿可能随总线的操作条件而变化的总线时序的系统。 该系统可以包括通信总线,被配置为经由通信总线发送数据的第一功能单元和被配置为经由总线接收数据的第二功能单元。 第一功能单元可以经由通信总线向第二功能单元发送第一值。 第一功能单元还可以被配置为响应于从发送第一数据值开始经过第一时间段的确定来断言数据有效信号。 第二功能单元可以被配置为接收第一数据值并且取决于数据有效信号对第一数据值进行采样。

    Security Enclave Processor Boot Control
    63.
    发明申请
    Security Enclave Processor Boot Control 有权
    安全处理器启动控制

    公开(公告)号:US20140089650A1

    公开(公告)日:2014-03-27

    申请号:US13626585

    申请日:2012-09-25

    Applicant: APPLE INC.

    Abstract: An SOC implements a security enclave processor (SEP). The SEP may include a processor and one or more security peripherals. The SEP may be isolated from the rest of the SOC (e.g. one or more central processing units (CPUs) in the SOC, or application processors (APs) in the SOC). Access to the SEP may be strictly controlled by hardware. For example, a mechanism in which the CPUs/APs can only access a mailbox location in the SEP is described. The CPU/AP may write a message to the mailbox, which the SEP may read and respond to. The SEP may include one or more of the following in some embodiments: secure key management using wrapping keys, SEP control of boot and/or power management, and separate trust zones in memory.

    Abstract translation: SOC实现安全飞地处理器(SEP)。 SEP可以包括处理器和一个或多个安全外设。 SEP可以与SOC的其余部分隔离(例如SOC中的一个或多个中央处理单元(CPU),或SOC中的应用处理器(AP))。 对SEP的访问可以由硬件严格控制。 例如,描述了CPU / AP仅能访问SEP中的邮箱位置的机制。 CPU / AP可以向邮箱写入消息,SEP可以读取并响应。 在一些实施例中,SEP可以包括以下一个或多个:使用包装密钥的安全密钥管理,引导和/或电源管理的SEP控制以及存储器中的单独的信任区域。

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