User Guide

Table Of Contents
Gen2 Tag Commands
131
Reset ReadProtect
The NXP command Reset ReadProtect restores normal operation to a tag which is in
ReadProtect mode. This command uses only the common fields and is invoked with the
following command:
The response to the Reset ReadProtect command is a simple ACK with standard status:
Change EAS
The NXP command Change EAS sets or resets the EAS system bit. When set, the tag
will return an alarm code if an “EAS Alarm” command is received. This command takes
an additional field:
Change EAS (1 byte: 0x01=Set EAS; 0x02=Reset EAS)
It is invoked with the following command:
The response to the Change EAS command is a simple ACK with standard status:
EAS Alarm
The NXP command EAS Alarm causes the tag to return coded information, but only when
the tag has its EAS system bit set. This command requires several fields in addition to the
common fields
FF 08 2D 03 E8 02 02 12 34 56 78
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SO
H
Length OpCode Timeout (ms) Chip
Type
Sub
Com-
mand
Access Password CRC
FF 00 2D 00 00 1D 25
SOH Length OpCode Status CRC
FF 09 2D 03 E8 02 03 00 00 00 00 00
?
?
?
?
SO
H
Length OpCode Timeout (ms) Chip
Type
Sub
Com-
mand
Access Password Change
EAS
CRC
FF 00 2D 00 00 1D 25
SOH Length OpCode Status CRC