User's Manual

December 6, 2006 Proprietary Information 40
Revision 1.0
4.6.6 READ_ALL Sub-Command
The READ_ALL 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. This version of the read
command will not filter out tag IDs that do not conform to the
EPC tag data standards, as the standard READ command does.
The READ_ALL sub-command contains the following
message format:
Figure 27 READ_ALL Sub-Command Message Format
Table 26 READ_ALL 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
MSB LSB
Message
Command Parameters
Sub-
Command Parameters
0x03 0x0A
Filter Bit
Count
Filter_Bits
1 byte 1 byte 1 byte 16 bytes 109 bytes