User Manual Part 1

RFID Interface

LRP2000 Long Range Passice Reader/Writer

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ABxS Command 04H: Fill Tag

DESCRIPTION

Fill an RFID tag with a one byte value over multiple contiguous

addresses.

DISCUSSION

This command is commonly used to clear contiguous segments of a

tag's memory. It writes a one byte value repetitively across a specified

range of tag addresses. The fill function requires one data value byte,

a starting address, and a fill length. It will then proceed to fill the tag

with the data value byte, starting at the specified start address for the

specified number of consecutive bytes. When Fill Length is set to 0,

the controller will write fill data from the start address to the end of the

tag's memory. The timeout value is given in 1 msec increments and

can have a value of 001EH to FFFEH (65,534 ms). When the timeout

is set to 0, the controller will return a syntax error.

Field Remarks

Command Command number in hex

preceded by AAH

Start Address The tag address

where the fill will start

Fill Length The number of tag addresses

to be filled in bytes

Timeout Timeout value given in 1 ms

units (10H - FFFEH)

Data Value Byte The byte to be used as fill

Message Terminator FFFFH