BLOCKING READER: DESIGN AND IMPLEMENTATION OF A ...

4.3.5.5 ACK(mandatory)
Table 4.11. ACK command [3]
Command RN
# of bits 2 16
Description 01 Echoed RN16 or handle
Table 4.12. NAK command [3]
Command
# of bits 8
Description 11000000
ACK command is a acknowledgment given by the Reader to a signal Tag. It is
a command which just replies with the same RN16 sent by the Tag. The command
bits are as shown in the Table 4.11.
4.3.5.6 NAK(mandatory)
A NAK command is implemented by Reader and Tag to command all Tags to
return to arbitrate state. Table 4.12 shows the command bits.
4.4 Summary
ISO 180006-C GENERATION-2 PROTOCOL is designed for a specific pur-
pose. To have a standardized communication layer for all the Tags. Tag Vender
use this extensively now. Implementing this in the Reader requires understanding of
timings and different commands. The low cost Reader designs have limited memory.
A part of protocol can be implement for the basic operation of the Reader. In the
next chapter we will discuss about implementation of this protocol in the Blocking
Reader.
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