RFID UHF Memory Banks Explained

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Passive UHF RFID tags contain four distinct memory banks, each serving a unique function. Colynn Black, RFID Business Development Director, breaks down their roles:

  • Reserved Memory Bank: Stores security passwords like the access password (which locks EPC and User memory) and the kill password (which can deactivate the tag).
  • EPC Memory Bank: The most recognized bank, known as the “Electronic Product Code,” typically stores 96-496 bits of public data.
  • TID Memory Bank: A factory-locked bank that contains the tag’s TID number, acting as a “license plate” for identification.
  • User Memory Bank: Similar to the EPC bank, it can store up to 8,000 bits of customizable data.

These memory banks are accessed only when commanded by an RFID reader, each playing a crucial role in tag functionality and security.