Patent ID: 9099864
Filing Date: 2015-08-04
Classification: G06F,H02H

Abstract:
1. A portable electronic device operable to communicate with an accessory device when the accessory device is coupled to the portable electronic device, the portable electronic device comprising: a connector port having a plurality of contacts each operable to receive a respective signal having a signal voltage from the accessory device; processing circuitry operable to receive the signals from the plurality of contacts of the connector port; and protection circuitry coupled between the processing circuitry and the connector port, wherein the protection circuitry assigns a threshold voltage to each contact of the connector port based on a communications protocol used by the accessory device coupled to the portable electronic device, wherein the protection circuitry monitors the signal voltage of each of the contacts to identify which contacts have signal voltages that exceed the assigned threshold voltages, and wherein the protection circuitry electrically disconnects the processing circuitry from the identified contacts.