Specifications

Serial port intercommunication agreement | VI-88TR development handbook
access password, and can be set to readable and writable from secured
state or permanently readable and writable or never readable and writable
later;
Permanently Readable and Writable—can be read and written without
access password, but can’t be set to readable and writable from secured
state or never readable and writable later;
Readable and Writable from secured state—can read and modify password
with access password only, and can be set to permanently readable and
writable or readable and writable from any state or never readable and
writable later;
Never Readable and Writable—can’t be read or write even if with access
password, can’t read or modify password forever.
Note: to set read and write protect for tag, must know access
password of tag in advance.
（2） Memory unit of ISO-18000-6B is devided into 2 memory banks.
Internal storage capacity is 2048bits, which is devided into 256bytes. An
address is for each byte, corresponding to 0～255.
Thereinto:
 Address 0～7, 8 words(64bits): tag ID number. Fixed before product
leaves factory, can’t be modified.
 Address 8～223: user information storage area, can be distributed at
discretion. Can be rewrited, and can be locked. Once locked, can’t be
rewrited again, and can’t be unlocked.
 Address 224～255: write protection byte.
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