GS1 EPC Tag Data Standard 1.6 - Indicod-Ecr

3152315331543155315631573158BitPosition inSegmentField49 No BlockErase EPCAddressAlignment57 – 50 Block EraseUser AddressOffset58 No BlockErase UserAddressAlignmentDescriptionThis bit is used to indicate if the tag memory architecturehas hard block boundaries in the EPC memory bank.If the value is zero the tag has hard block boundariesin the EPC memory bank. The tag will not acceptBlockErase commands that start in one block and endin another block. These block boundaries aredetermined by the max block size and the startingaddress of the first full block. All blocks have thesame maximum size.If the value is one the tag has no block boundaries inthe EPC memory bank. It will accept all BlockErasecommands that are within the memory bank.This indicates the starting address of the first full blockthat may be erased in User memory bank.Bit 58: This bit is used to indicate if the tag memoryarchitecture has hard block boundaries in the USERmemory bank.If the value is zero the tag has hard block boundariesin the USER memory bank. The tag will not acceptBlockErase commands that start in one block and endin another block. These block boundaries aredetermined by the max block size and the startingaddress of the first full block. All blocks have thesame maximum size.If the value is one the tag has no block boundaries inthe USER memory bank. It will accept allBlockErase commands that are within the memorybank.63 – 59 [RFU] These bits are reserved for future use and should be set tozero.Table 45. XTID Block Write and Block Erase Information16.2.5 User Memory and BlockPermaLock SegmentThis two-word segment is present in the XTID if bit 10 of the XTID header is set. Bits15-0 shall indicate the size of user memory in words. Bits 31-16 shall indicate the size ofthe blocks in the USER memory bank in words for the BlockPermaLock command.Note: These block sizes only apply to the BlockPermaLock command and areindependent of the BlockWrite and BlockErase commands.Copyright ©2005- 2011 GS1 AISBL, All Rights Reserved. Page 124 of 218