| 摘要 |
A GPIO cell of a SOC functions, in a first state, to pass an output signal from one of plurality of modules of the SOC to a pin when an output enable signal is activated. The GPIO cell further functions, in a second state, to pass an alternate output signal from another one of the plurality of modules of the SOC to the pin when the output enable signal is activated. The GPIO cell further functions, in a third state, to pass the output signal to the pin when an alternate output enable signal is activated. The GPIO cell further functions, in a fourth state, to pass the alternate output signal to the pin when the alternate output enable signal is activated. The GPIO cell further functions, when the output enable signal or the alternate output enable signal is deactivated, to receive an input signal from the pin.
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