V01.00 | 2021/05
25
9.3.5
Read
With a read operation, the device automatically executes a read command as soon as the status
of the start bit changes (rising or falling edge). The user must manually trigger the switching of
the start bit.
Proceed as follows to execute the command:
Set rising edge at
START
bit.
Evaluate the status of the
RDY
bit.
The
RDY
status bit behaves in the same way as the edge status of the
START
bit.
The
RDY
bit behaves as follows if during the command execution a tag is located in the detec-
tion range of the read/write head:
START
RDY
Meaning
0
Ò
1
0
Ò
1
Input data present
1
Ò
0
1
Ò
0
Input data present
The
RDY
bit behaves as follows if during the command execution no tag is located in the detec-
tion range of the read/write head:
START
RDY
Meaning
0
Ò
1
0
No tag within the detection range
0
Ò
1
Tag was or is in the detection range, input data available
1
Ò
0
1
No tag within the detection range
1
Ò
0
Tag was or is in the detection range, input data available
