GS1 EPC Tag Data Standard 1.6 - Indicod-Ecr

2909291029112912291329142915291629172918291929201. If the URI is not syntactically valid according to Section 12.4, stop: this URI cannotbe encoded.2. Apply the encoding procedure of Section 14.3 to the URI. The result is a binarystring of N bits. If the encoding procedure fails, stop: this URI cannot be encoded.3. Fill in the Gen 2 EPC Memory Bank according to the following table:Bits Field Contents00 h –0F hCRC CRC code calculated from the remainder of the memory bank.(Normally, this is calculated automatically by the reader, andso software that implements this procedure need not beconcerned with it.)10 h – Length The number of bits, N, in the EPC binary encoding14 h determined in Step 2 above, divided by 16, and rounded up tothe next higher integer if N was not a multiple of 16.15 h UserMemoryIndicator16 h XPCIndicatorIf the EPC Tag URI includes a control field [umi=1], a onebit.If the EPC Tag URI includes a control field [umi=0] ordoes not contain a umi control field, a zero bit.Note that certain Gen 2 Tags may ignore the value written tothis bit, and instead calculate the value of the bit from thecontents of user memory. See [UHFC1G2].This bit is calculated by the tag and ignored by the tag whenthe tag is written, and so is disregarded by this encodingprocedure.17 h Toggle 0, indicating that the EPC bank contains an EPC18 h –1F hAttributeBitsIf the EPC Tag URI includes a control field [att=xNN], thevalue NN considered as an 8-bit hexadecimal number.If the EPC Tag URI does not contain such a control field,zero.20 h – ? EPC / UII The N bits obtained from the EPCbinary encoding procedurein Step 2 above, followed by enough zero bits to bring thetotal number of bits to a multiple of 16 (0 – 15 extra zero bits)Table 39. Recipe to Fill In Gen 2 EPC Memory Bank from EPC Tag URIExplanation (non-normative): The XPC bits (bits 210 h – 21F h ) are not included in thisprocedure, because the only XPC bits defined in [UHFC1G2] are bits which are writtenindirectly via recommissioning. Those bits are not intended to be written explicitly by anapplication.15.1.2 EPC Raw URI into Gen 2 EPC Memory BankGiven:Copyright ©2005- 2011 GS1 AISBL, All Rights Reserved. Page 112 of 218