User's Manual

December 6, 2006 Proprietary Information 34
Revision 1.0
4.6.4 READ Sub-Command
The READ sub-command is used to read tags. The
SCROLL_ALL_ID command is used to search for tags during
the interrogation process. During this process, the reader
listens for the loudest tag, responds, and “quiets” that tag in
order to hear the next loudest tag. The READ sub-command
contains the following message format:
Figure 21 READ Sub-Command Message Format
Table 20 READ Sub-Command Field Definitions
Field Definition
FILTER_BIT_COUNT
Number of filter bits to follow (0..96). Filter bit count of 0
indicates no filter bits.
FILTER_BITS Holding filter bits
If any tags are filtered and read, this command will return
multiple messages.
MSB LSB
Message
Command Parameters
Sub-
Command Parameters
0x03 0x01
Filter Bit
Count
Filter_Bits
1 byte 1 byte 1 byte 16 bytes 109 bytes