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RFID Communications
LRP2000 Passive Reader/Writer
106
6.5.12 ABxF Command 84H: Fill All
DESCRIPTION
Command 84 H fills all RFID tags-in-field or all tags in the same family, with a one-byte value over multiple
contiguous addresses.
DISCUSSION
This command is commonly used to clear an RFID tag's memory. It writes a one-byte value repetitively
across a specified range of tag addresses. All tags present in the antenna field with the specified family
code are affected by this command. The Fill All function requires one data value byte, a start address, and
a number of bytes to fill. It fills the tag with the data value byte, starting at the specified start address for the
specified number of consecutive bytes. The fill length must be set to a non-zero value. The timeout value is
given in 1 msec increments and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is set
to 0, the controller returns a syntax error.
SN Byte 3/tag 3 03H
SN Byte 4/tag 3 00H
SN Byte 5/tag 3 00H
SN Byte 6/tag 3 01H
SN Byte 7/tag 3 04H
SN Byte 8/tag 3 E0H
Data from Address 0002H AAH
Data from Address 0003H 21H
Data from Address 0004H 44H
Checksum 62H
Terminator 03H
Field Content
Header 0202H
Packet Size Packet length in bytes excluding the header, packet size, checksum, and terminator bytes. 0008H
for this command
Command 84H
Family Code Tag Family Code - 00H = all tags
Reserved Ignored byte, set to 00H
Start Address 2-byte value for the starting tag address
Fill Length 2-byte value for the length of the fill in number of Bytes (1-48)
Timeout 2-byte value for timeout in 1 ms units (1EH - FFFEH)
Data value Byte 1 byte of fill
Checksum Optional checksum
Terminator 03H
Field Content