User Guide

Table Of Contents
Gen2 Tag Commands
130
NXP Common Fields
In addition to the common fields some commands have additional required fields as
indicated below.
Set ReadProtect
The NXP command Set ReadProtect causes the commands Read, Write, Kill, Lock,
Access, Set ReadProtect, Change EAS, EAS Alarm and Calibrate to be disabled until a
“Reset ReadProtect” is received. This command uses only the common fields and is
invoked with the following command:
The response to the Set ReadProtect command is a simple ACK with standard status:
Field Value
Length 1 byte
OpCode 0x2D
Timeout 2 bytes
Option 0x02 for NXP
Sub Command
NXP Sub Commands
Access Password 4 bytes, tag’s access password
Note: Must be non-zero for Set/
Reset ReadProtect and
Change EAS
Note: EAS Alarm does not take the
Access Password field.
FF 08 2D 03 E8 02 01 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