User's Manual

Table Of Contents
Tag Responses
Use or disclosure of Proprietary Information contained on this sheet is subject to the restriction stated on the title page of this document. 7-9
The valid tags are set to 0 for tag not in frame slot and 1 for tag in frame slot. The tran-
sponder message is the high-order nibble and the message type tag is the low-order
nibble. This byte is passed with each tag but currently is not used. The transponder ID
tag is the identifier read from the tag. There may be one to four tags read for a given
response. A read with no transponder ID tags is not forwarded to the host. The reader
also presents a tag’s CRC to the host as part of the response in the CRC field.
IAG Read Response
Data Valid Tag 1 0000H/0001H
Data Valid Tag 2 0000H/0001H
Data Valid Tag 3 0000H/0001H
Data Valid Tag 4 0000H/0001H
Data Transponder Message and Message Type Tag 1 (not used) XXH
Data Transponder ID Tag 1 XXXX.XXXXH
CRC CRC Tag 1 XXXXH
Data Tag Type Indicator (Toll Tag = 01H) XXH
Data Transponder Message and Message Type Tag 2 (not used) XXH
Data Transponder ID Tag 2 XXXX.XXXXH
CRC CRC Tag 2 XXXXH
Data Tag Type Indicator (Toll Tag = 01H) XXH
Data Transponder Message and Message Type Tag 3 (not used) XXH
Data Transponder ID Tag 3 XXXX.XXXXH
CRC CRC Tag 3 XXXXH
Data Tag Type Indicator (Toll Tag = 01H) XXH
Data Transponder Message and Message Type Tag 4 (not used) XXH
Data Transponder ID Tag 4 XXXX.XXXXH
CRC CRC Tag 4 XXXXH
Data Tag Type Indicator (Toll Tag = 01H) XXH
Antenna Antenna Number XXH
Table 7-5 CVISN Read Response (5014H) (continued)