RFID Interface
72
LRP820S-Series Long-Range Passive Reader/Writers
Example:
Reads 4 bytes of data from the tag starting at address 0001H. A
timeout of 2 seconds (07D0H = 2000 x 1 msec increments) is set for
the completion of the Block Read All. The Family ID byte is set to zero
so all tags will be read. Three tags respond with read data.
Command from host
Response from controller
MSB LSB Remarks
MSB LSB
Remarks
AAH 85H Perform
Command 85
AAH
85H
Command Echo/
Tag 1
00H 02H Tag Family 00/
Index 2
00H
30H
Data byte 1/Tag 1
00H 01H Start Address
00H
31H
Data byte 2/Tag 1
00H
04H Read Length
00H
32H Data byte 3/
Tag 1
00H
07H
D0H Timeout
33H
Data byte 4/Tag 1
FFH
FFH FFH Message
Terminator
FFH
Terminator/ Tag 1
AAH
85H
Command Echo/
Tag 2
00H
40H
Data byte 1/Tag 2
00H
41H
Data byte 2/Tag 2
00H
42H
Data byte 3/Tag 2
00H
43H
Data byte 4/Tag 2
FFH
FFH Terminator/ Tag 2
AAH
85H
Command Echo/
Tag 3
00H
34H
Data byte 1/Tag 3
00H
35H
Databyte 2/Tag 3
00H
36H
Data byte 3/Tag 3
00H
37H
Data byte 4/Tag 3
FFH
FFH
Terminator/ Tag 3
AAH
FFH Termination Packet 03H
08H
Ntag/Status
FFH
FFH Terminator
Message
