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Philips Semiconductors Product Specification Revision 3.0 2004 January 30I•CODE UIDSL2 ICS114.1 User DataThe memory blocks 0 to 11 can be used to store user data.4.2 User Data Cyclic Redundancy CheckTo provide protection from undetected errors during the data transmission from the I•CODE UID smart Label to theRead/Write device a sixteen bit Cyclic Redundancy Check of the User Data (UD CRC 16) must be stored in the memoryblocks 12 and 13. Every time the User Data is changed, the User Data Cyclic Redundancy Check (UD CRC 16) must beadjusted as well. The CRC 16 algorithm is described in detail in Section 10.2.4.3 Unique IdentifierThe 40-bit Unique Identifier (UID) is programmed during the production process and cannot be changed afterwards(Read Only = RO).MSByte Unique Identifier LSByteBlock 14 Block 15 Block 16 Block 17 Block 184.4 Cyclic Redundancy CheckA 16-bit Cyclic Redundancy Check (CRC 16) for the UID is located in the blocks 19 and 20 and is also programmed byPHILIPS. The CRC 16 algorithm is described in detail in Section 10.2.4.5 Destroy CodeThe 24-bit Destroy Code is located in the blocks 21 to 23 and is not programmed by Philips Semiconductors. The DestroyCode needs to be programmed during label personalisation.4.6 Configuration of delivered ICsThe I•CODE UID Smart Label ICs are delivered with following configuration by PHILIPS:• The User Data bytes are defined as 00 hex and Read/Write (R/W)• In accordance with the User Data the UD CRC 16 is defined as 7B06 hex and Read/Write (R/W)• The Unique Identifier is unique and Read Only (RO)• The CRC 16 is defined according to the Unique Identifier and Read Only (RO)• The Destroy Code is not defined and One Time Programmable (OTP)8
Philips Semiconductors Product Specification Revision 3.0 2004 January 30I•CODE UIDSL2 ICS115 FUNCTIONAL DESCRIPTION5.1 Basic System ConfigurationThe following block diagram shows the I•CODE system configuration.Read / Write Device (RWD)Oscillator Modulator DriverHostInterfaceControlSignal & DataProcessingRWDAntennaMAmplifierDemodulatorFilterI•CODEUID ICSmart LabelAntennaFig.3 System Configuration.A control and data processing unit controls the modulation of the carrier signal and processes data <strong>com</strong>ing back from thedemodulator circuit.9
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