OBID
i-scan
®
UHF
Manual
ID ISC.LRU3000/3500
FEIG ELECTRONIC GmbH
Page 174 of 193
H90202-7e-ID-B.docx
11. Protocols for Buffered Read Mode and Notification Mode
11.1. The Buffered Read Mode Procedure
By using the “BRM” the Reader itself reads data from every Transponder which is inside the an-
tenna field. This mode must be enabled in the
7.10. CFG11: Read Mode – Read Data
The sampled Transponder data sets are stored in a FIFO organized data buffer inside the Reader.
The buffered read mode runs offline from any host commands and it is immediately started after
power up or a
9.2. [0x63] RF Controller Reset
Only two commands are necessary to read out sampled Transponder data sets. The figure below
illustrates the Buffered Read Mode procedure:
Host
→
Reader
[0x22]
Read Buffer
Command to the Reader
to read data
typ. 6 ms
Host
←
Reader:
Status e.g. = 0x92
No Valid Data
there are no data sets inside the data buffer
.
.
.
Host
→
Reader
[0x22]
Read Buffer
Command to the Reader
to read data
typ. 6 ms
Host
←
Reader:
Status e.g. = OK
and n Data Sets
there are data sets inside the data buffer and
n data sets are transferred to the host
.
.
.
Host
→
Reader
[0x32]
Clear Data Buffer
Command to the Reader
to clear the read data sets
typ. 6 ms
Host
←
Reader
Status e.g. = OK
the n read out data sets are
cleared from the data buffer
:
Host waits for an answer from the Reader
: Host is able to do other jobs e.g. to communicate with other Readers
Additional information about the capacity of the data buffer can be determined with the
