In this tutorial Howard Heckman, PTS software developer, explains the different RFID Chip Memory banks and how each can be used in an RFID application. Reserved Memory - This memory bank stores a Kill and Access password. The Kill password permanently disables the tag and the Access password is set to lock and unlock the tag's write capabilities. EPC Memory - This is the Electronic Product Code and is typically used as the identifier in most applications that only need 96 bits of memory. This bank is writable. TID Memory - This memory is only used to store a Unique Tag ID Number and is assigned by the manufacturer. Typically this cannot be changed. User Memory - This memory is used when the user needs more memory than what is available in the EPC section. The user memory can vary in size and is typically no more than 512 bits however some high memory tags can approach 4k or 8k bytes of memory. This bank is writable.