User Manual Part 2

RFID Interface
134
LRP820S-Series Long-Range Passive Reader/Writers
Example
Reads 4 Bytes of data from the tag starting at address 0001H. The
Family ID Byte is set to zero so all tags will be read. The Tag Delay is
set to 20 (14H). Two tags respond with read data.
Command from host Response from controller
Field Content Field Content
Header 0202H Heade 0202H
Command Size 0008H Response Size 0001H
Command Code 8DH Command Echo 8DH
Family ID 00H Checksum 71H
Reserved 00H Te rm i nato r 03H
Start Address 0001H
Read Length 0004H
Tag Delay 14H
Checksum 50H
Terminator 03H
After the controller sends the acknowledgment, it will send the read
data from the 2 tags.
Field Content
Header 0202H
Response Size 0005H
Command Echo/
Ta g 1
8DH
Data from address
0001H
05H
Data from address
0002H
AAH
Data from address
0003H
21H
Data from address
0004H
44H