MULTIPLE HARDWARE INTERRUPT FUNCTIONALITY ON NEAR-FIELD COMMUNICATION (NFC)

摘要

Hardware interrupt functionality associated with a disable pin may be used to place a near-field communication (NFC) device into various operational modes. For example, various intermediate voltage windows may be defined within an I/O voltage domain and a resistive divider running off an I/O rail may generate multiple reference voltages within the I/O voltage domain. In one embodiment, different comparators may compare voltage on the disable pin to the reference voltages generated with the resistive divider to determine whether the voltage on the disable pin falls within one of the intermediate voltage windows. As such, if a particular comparator determines that the voltage on the disable pin falls within one of the intermediate voltage windows, a control signal may be generated to transition the NFC device into a corresponding operational mode.

主权项

1. A hardware interrupt method, comprising:
detecting voltage on a disable pin; determining that the voltage detected on the disable pin falls within one of a plurality of operational windows; and configuring a communication module to operate in one of a plurality of modes that is associated with the one of the plurality of operational windows.