| 摘要 |
A system is provided for communicating with a device within a packaged semiconductor device through a shared external terminal thereof. As one example, the system provides for testing a memory within the package. In addition to the device and the shared external terminal, the system includes a command register that receives a plurality of command signals, and digital logic devices coupled between the external terminal and the command register. Each of the digital logic devices receives a different clock signal and outputs one of the command signals to the command register. The command signals are provided to the external terminal in a sequence that is coordinated with the clock signals so that each digital logic device buffers one of the command signals.
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