User's Manual

UHF RFID Reader UR - SERIES User Manual v1.14
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inquired tags to host
0x03
For status = 0x03, reader is not able to response all the data in a single
frame, further data will be transmitted in the following frames.
0x04
Reader only completed parts of the inventory but run out of memory space
due to the amount of tags. Reader will report all the already inquired tags as
well as this status value to host.
0xF8
Antenna error detected, the current antenna might be disconnected.
Ant: indicates which antenna had inquired a tag. For example, 0x04 is 0000 0100 in binary, this
indicates Antenna 3 had inquired this specific tag. For 0x08, it is 0000 1000 in binary, then it
indicates Antenna 4 had inquired tag information.
Num: the amount of RFID EPC/TID included in this response.
EPC ID: inquired EPC/TID data. For instance, EPC-1 is the EPC/TID length + EPC number/TID
data + RSSI value of the first tag etc. The RSSI and EPC length values are one byte parameters. The
unit of EPC C1 G2 data is word. During communication, the most-significant word and the
most-significant byte in a word will be transmitted first.
In the situation when FastID function is enabled, every EPC ID data block follows this format:
Total length of EPC plus TID (1 byte) + tag EPC number + 12 bytes TID data + tag RSSI value
The most-significant bit of total length of EPC and TID indicates whether TID is included in this
block.
Detail structure of EPC ID
EPC ID
EPC-1
EPC-2
…
Data length
Data
RSSI
Data length
Data
RSSI
1 byte
N byte
1 byte
1 byte
N byte
1 byte
bit7:
0 – data block contains EPC or
TID;
1 – data block contains EPC
plus TID (FastID enabled).
bit 6 ~ bit 0: length of data N
NOTE: FastID function only valid on FastID supported inlay from Impinj.
8.2.2 Read data
The function of this command is to read data from reserved memory, EPC memory, TID memory,
user memory of tag. Read operation starts from a defined address. The unit of data is word.
Command frame:
Len
Adr
Cmd
Data[]
CRC-16
0xXX
0xXX
0x02
——
LSB
MSB