| 摘要 |
<p>A method, system and apparatus for reducing power consumption in low power electronic devices is described. The invention includes an input/output (I/O) circuit that includes a pin enable circuit in which a contingency register holding a contingency bit having a predetermined value is coupled to a power register. During a powerdown state, the contents of the power register is replaced by the contingency bit to determine the state of the I/O circuit. Using such a circuit, the value of the contingency bit can be set so that the I/O circuit continues, or ceases, to supply power to an attached I/O device upon powerdown depending on the value set for the contingency bit.</p> |
