Patent ID: 8261000
Filing Date: 2012-09-04
Classification: G06F

Abstract:
1. A portable computing device, comprising: a dock detector circuit having a pull down circuit and an interface pin configured to be coupled to a docking station via a single line dock connection, wherein the dock detector circuit is configured to: reset a passive component in the docking station when the portable computing device is connected to the docking station via the single line dock connection and by operation of the pull down circuit; switch a dock connection driver in the portable device to operate as an input device; after a predetermined time period, measure a voltage level on the single line dock connection; in response to the measured voltage level being above a certain threshold, wait for a first time step state; in response to the measured voltage being at or below the certain threshold, wait a second time step; and return a number of second time steps for the passive component to reach a voltage above a high voltage threshold.