Patent ID: 7240848
Filing Date: 2007-07-10
Classification: G06K

Abstract:
1. A three-port RFID interface integrated-circuit chip, comprising: a bi-directional RF first port that is adapted to be coupled to an external source of RF energy; an analog front end (AFE) circuit that is coupled to the bi-directional RF first input port, wherein the AFE circuit provides an AFE power supply DC output voltage from a RF signal received from the external source of RF energy, wherein the AFE circuit is coupled to a bi-directional AFE interface bus on which are exchanged data I/O signals and status/control signals; an external memory second port through which an external memory integrated circuit is coupled to an interface circuit module; wherein the interface circuit module receives the AFE power supply DC output voltage from the AFE circuit, wherein the interface circuit module provides through the external memory second port an external memory integrated circuit power supply voltage to the external memory integrated circuit; wherein the interface circuit module is connected to the AFE interface bus; wherein the interface circuit module is coupled to the external memory IC through a bi-directional memory integrated circuit interface bus on which are exchanged data I/O signals and status/control signals; a third external electronic system port through which an external electronic system is coupled to the interface circuit module; wherein the external electronic system provides an external system power supply voltage to the interface circuit module; and wherein the external electronic system is coupled to the interface circuit module through a bi-directional external electronic system interface bus on which are exchanged data I/O signals and status/control signals.