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发明授权
US5574894A Integrated circuit data processor which provides external sensibility of internal signals during reset 失效
集成电路数据处理器，在复位期间提供内部信号的外部灵敏度

Integrated circuit data processor which provides external sensibility of internal signals during reset
摘要：
An integrated circuit terminal of a data processing system (10) is used to communicate multiplexed signals with an external device. During a reset operation in which a reset signal is asserted, a desired internal clock signal is driven to the integrated circuit terminal such that an emulation system (52) may use the internal clock signal to synchronize an emulation operation. After the reset signal is negated, the emulation system synthesizes the internal clock signal for use during emulation. External visibility of a write operation to a register which controls pertinent signal parameters is provided via other integrated circuit terminals when the data processor operates in an emulation mode. The external visibility allows the development system to make similar changes to corresponding signal parameters therein. Therefore, the development system is able to accurately synchronize an emulation operation even when signal parameters are modified during operation.
摘要（中）：

数据处理系统（10）的集成电路终端用于与外部设备通信多路复用信号。 在其中确定复位信号的复位操作期间，期望的内部时钟信号被驱动到集成电路端子，使得仿真系统（52）可以使用内部时钟信号来同步仿真操作。 在复位信号被否定之后，仿真系统合成内部时钟信号，以便在仿真期间使用。 当数据处理器以仿真模式运行时，通过其他集成电路终端提供对控制相关信号参数的寄存器的写入操作的外部可视性。 外部可视性允许开发系统对其中的相应信号参数进行类似的改变。 因此，即使在操作期间修改信号参数时，开发系统也能够精确地同步仿真操作。

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