User Manual Part 1

RFID Interface
LRP2000 Long Range Passice Reader/Writer
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ABxS Command 86H: Block Write All
DESCRIPTION
Write a block of data to all RFID tags or all tags with the same Family
ID.
DISCUSSION
This command is used to write segments of data to contiguous areas
of tag memory. It is capable of transferring up to 1 kByte of data from
the Host with one command. 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.
The BlockWrite consists of a Tag Family ID and an Reserved Byte,
start address followed by the data stream to be written to the RFID
tag. If the write range exceeds the last tag address, the controller wil
return error message 21H, invalid format. The data to be written to
the tag is contained in the LSB of the register, and the MSB is always
00H. The controller returns a response when the timeout expires. The
controller returns a response when the timeout expires.
Field Remarks
Command Command number in hex preceded
by AAH
Family ID Tag Family ID - 00H = all tags
Reserved 00H
Start
Address
The tag address where the write will
start
Write Length The number of tag addresses to be
written to in bytes
Timeout Timeout value given in 1 ms units
(001EH - FFFEH)
Write Data The data to be written
Message Terminator FFFFH