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ISO 15693-Compliant 64-Bit UID
Request Data for the Stay Quiet Command
REQUEST FLAGS
(1 Byte)
REQUEST FLAGS
(1 Byte)
COMMAND
02h
COMMAND
25h
UID
(8 Bytes)
Request Data for the Select Command*
UID
(8 Bytes)
*If this command is processed without any error, the slave responds with a response flags byte of 00h.
Request Data for the Reset to Ready Command*
REQUEST FLAGS
(1 Byte)
COMMAND
26h
UID**
(8 Bytes)
*If this command is processed without any error, the slave responds with a response flags byte of 00h.
**The UID is transmitted only in the addressed mode.
Stay Quiet
The Stay Quiet command addresses an individual slave
and transitions it to the quiet state. The request must be
sent in the addressed mode (Select_flag bit = 0,
Address_flag bit = 1). The slave transitioning to the
quiet state does not send a response.
Select
The Select command addresses an individual slave
and transitions it to the selected state. The request
must be sent in the addressed mode (Select_flag
bit = 0, Address_flag bit = 1). The slave transitioning to
the selected state sends a response. If there was a
slave with a different UID in the selected state, then that
slave transitions to the ready state without sending a
response.
Reset to Ready
The Reset to Ready command addresses an individual
slave and transitions it to the ready state. To address a
slave in the quiet state, the request must be sent in the
addressed mode (Select_flag bit = 0, Address_flag
bit = 1). To address a slave in the selected state, the
request can be sent in any address mode. The slave
transitioning to the ready state sends a response.
Memory Function Commands
The command descriptions show the data fields of the
request and response data packets. To create the com-
plete frame, an SOF, 16-bit CRC, and EOF must be
added (see Figure 4). ISO 15693 defines three address
modes, selected, addressed, and nonaddressed,
which are specified through the setting of the
Select_flag bit and the Address_flag bit. The memory
function commands can be issued in any address
mode. To access slaves in the quiet state, the
addressed mode is required. The addressed mode
requires that the master include the slave's UID in the
request.
Error Indication
In case of an error, the response to a request begins
with a response flags byte 01h followed by one error
code.
If there was no error, the response begins with a
response flags byte 00h followed by command-specific
data, as specified in the detailed command description.
If the MAX66100 does not recognize a command, it
does not generate a response.
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