RFID Communications

Field

Content

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

 

 

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.

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

 

 

LRP2000 Passive Reader/Writer

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Escort LRP2000 manual ABxF Command 84H Fill All, 106