User Guide

Table Of Contents
Gen2 Tag Commands
125
Read Tag Data Get Data and Metadata Request Fields
A response can contain the following information:
Field Value Description
Option Bit 4=0
(0x0X)
No Metadata flags are specified and Meta Data will not be
returned. This is the Get Tag Data syntax. The lower bits (X) are
specified as defined by Tag Singulation/Select Functionality.
Bit 4=1
(0x1X)
Indicates that Metadata flags are to follow and the corresponding
Metadata shall be returned with the tag EPC. The lower bits (X)
are specified as defined by
Tag Singulation/Select Functional-
ity.
Metadata Flags
(to specify more
than one OR
the values
together)
0x0000 When no flags are set no meta data will be returned, only the tag
EPC (including PC bits and tag CRC)
0x0001 When bit 0 is set the Read Count will be returned
0x0002 When bit 1 is set the LQI/RSSI will be returned
0x0004 When bit 2 is set the Antenna ID will be returned
0x0008 When bit 3 is set the Frequency will be returned
0x0010 When bit 4 is set the Timestamp will be returned
0x0020 When bit 5 is set the RFU (ThingMagic Only) will be returned
0x0040 When bit 6 is set the Protocol is returned.
These fields are followed by the Read Tag Data Fields then the Tag Singulation/Select Func-
tionality (set appropriate bits in the Option field defined above, do not specified an addi-
tional Option field), used the same as defined in the
Get Tag Data syntax, as necessary.