User's Manual

December 6, 2006 Proprietary Information 37
Revision 1.0
4.6.5 SCROLL ID Sub Command
The SCROLL ID sub-command is used to search for tags in
dense (very closely grouped) tag environments. Using Scroll
ID for tag singulation requires more time to execute than the
standard READ sub-command. Therefore, it is not
recommended for low density tag environments. The Scroll ID
sub-command status message contains the following message
format:
Figure 24 SCROLL ID Sub-Command Message Format
Table 23 SCROLL ID Subcommand Field Definitions
Field
Definition
MSB LSB
Message
Command Parameters
Sub-
Command Parameters
0x03 0x09 Filter Bit Count Filter_Bits
1 byte 1 byte 1 byte 16 byte 109 bytes
Field Definition
FILTER_BIT_COUNT Number of filter bits to follow (0..96). Filter bit 0 indicates no filter bits.
FILTER_BITS Holding filter bits.