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How to write a UHF RFID tag

UHF RFID tag, normally refered as  ISO18000-6C & EPC C1G2 protocol compliance rfid tag,of coure there are also ISO18000-6B protocol uhf rfid tag, but such 6B protocol rfid tags are gradually marginalised, so hereby we only write uhf rfid tags based on ISO18000-6C protocol rfid tag.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
Firstly knowing the chip's memory map is important before encoding,D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

1. what is the chip's model?D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
2. what is the exactly chip's memory map?D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Normally 6C protocol RFID tags memory divided into TID memory, ECP memory, user memory and reserved Memory.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

TID memory- which is chip's UID, and is global unique ID, which has been fixed in chip factory, and it is not writable. D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
EPC memory- it is the most frequently used memory blockD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
Uer memory- some chip without user memory, while some has, depended on user's requirementsD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
Reserve memory- nromally for store access password and killing passwordD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
Below is impinj Monza R6 serial chip's memory.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Impinj R6 chip.jpgD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
Right now we just demonstrate impinj Monza R6 chip.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Before write, need to know its chip memory map and its address.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

impinj Monza R6- GEE NFC.jpgD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

For example, write EPC memory, impinj R6 starting address shall be at 20, each address got 16 bit, say 2 bytes or 4 hex. D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
its reserved memeory, though listed on memory map, however, the killing password and access password is unable to be used, chip manafacturer has locked this memory block as non-operatable, so for impinj Monza R6 chip, actually it can't use password function.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
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Then you need to carefully consider what content shall be wrote into the UHF RFID tags, if it shall set password?然后进行仔细的考虑,我们需要存储什么样的数据到UHF RFID电子标签里面,是否需要加密D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

A typeical samples is textile RFID tag encoding methods, such as uniqlo rfid tag,D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

96 bit EPC, total can store 24 HEX, how to designate this 24 HEX to texile RFID tag is important, the following illustartion clearly shown a branded clothing memory types,D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

EPC memory map.jpgD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

1- 14 HEX as commodity UPCD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

15- 19 HEX as Style, color, size...D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

20- 24 HEX as serial noD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
Access password and  killing password shall be added as per needs, but need to pay attention that the RFID chip shall support this function, otherwise it can not be used, for example impinj Monza R6 chip is not supported.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

 D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Finally prepare UHF RFID reader ( such as zebra RFID printer or desktop uhf rfid reader) for batch writing.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

As following illustrationD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

The original EPC No of  RFID tag is E28011606000000207A64E218B, default EPC starting address is from address 2, address 0 and address 1 actually could be omitted when writingD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

tag write1.jpg.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
And the new EPC we wanted to write is  1234567890ABCDEF, consider the whole EPC length is 24 HEX, the last 8 hex filled with 0, then write 1234567890ABCDEF00000000D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Query again the uhf rfid tag, the updated EPC No is set.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

tag write4.jpgD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

Pay attetion to starting address and EPC length before writing.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider
Access password and killing password operation is same as EPC, need to refer chip datasheet, and write HEX into designated address.D74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

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GEE NFC LIMITEDD74GEENFC: A Global RFID tag, NFC tag, RFID Solution Provider

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