RFID Communications
After the controller sends the acknowledgment, it sends the read data from the two tags.
Field | Content |
Header | 0202H |
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|
Response Size | 0005H |
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|
Command Echo/Tag 1 | 8DH |
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Data from Address 0001H | 05H |
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Data from Address 0002H | AAH |
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Data from Address 0003H | 21H |
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Data from Address 0004H | 44H |
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Checksum | 59H |
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Terminator | 03H |
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Header | 0202H |
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|
Response Size | 0003H |
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|
Command Echo/Tag 2 | 8DH |
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Data from Address 0001H | 05H |
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Data from Address 0002H | AAH |
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Data from Address 0003H | 21H |
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Data from Address 0004H | 44H |
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Checksum | 59H |
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Terminator | 03H |
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|
6.5.18 ABxF Command 91H: Memory Lock All
DESCRIPTION
Command 91H locks contiguous blocks of
DISCUSSION
The memory can be locked only in contiguous blocks. The command passes one parameter for the first block, and another parameter for the number of blocks to be locked. This is one of only two ABx commands that address the memory of the tag using these parameters. The block structure of the tags is governed by the
Field | Content |
Header | 0202H |
|
|
Command Size | Command length in bytes excluding the header, command size, checksum, and terminator bytes. |
| 07H for this command. |
|
|
Command | 91H |
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|
Family Code | Tag Family ID - 00H = all tags |
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Reserved | Ignored byte, set to 00H |
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Timeout | Timeout value given in 1 ms units |
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Starting Block | First block of memory to be locked |
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|
Number of Blocks | Number of blocks that will be locked |
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|
Checksum | Optional checksum |
|
|
Message Terminator | 03H |
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|
LRP2000 Passive Reader/Writer | 114 |