ISL6296

I GN DE S W E RN ® D FO 6 E D N 0 MME E ISL92 PATIBLE S EC O U M R O T C NO Data Sheet - PI N FO R N I P S ISL6296 January 17, 2007 FN9201.1 FlexiHash™ For Battery Authentication The ISL6296 is a highly cost-effective fixed-secret hash engine based on Intersil’s FlexiHash™ technology. The device authentication is achieved through a challengeresponse scheme customized for low-cost applications, where cloning via eavesdropping without knowledge of the device’s secret code is not economically viable. When used for its intended applications, the ISL6296 offers the same level of effectiveness as other significantly more expensive high maintenance monetary-grade hash algorithm and authentication schemes. The ISL6296 has a wide operating voltage range, and is suitable for direct powering from a 1-cell Li-Ion/Li-Poly or a 3-cell series NiMH battery pack. The ISL6296 can also be powered by the XSD bus when the bus pull-up voltage is 3.3V or higher. The device connects directly to the cell terminals of a battery pack, and includes on-chip voltage regulation circuit, POR, and a non-crystal based oscillator for bus timing reference. Communication with the host is achieved through a singlewire XSD interface - a light-weight subset of Intersil’s ISD bus interface. The XSD bus is compatible for use with serial ports offered by all 8250 compatible UART’s or a single GPIO (general purpose input and output) pin of a microprocessor. A clone prevention solution utilizing the ISL6296 offers sa...