9.7 Reading out the digital data
The demodulated and digitized data is read out via DOUT.
First, an interface reset condition has to be applied as
usual before all serial commands [1]. After this, the three-bit
command READ_TAG is issued. After sending
the last of the three bits (1’s), the
HTRC110 switches instantly to transparent mode.
So, the transponder data is directly presented at
DOUT with a delay from RX to DOUT depending
on the demodulator filter settings. For optimizing the
WRITE-pulse positions (see Section 10.2 “Driver-off period
width and position”) the delay times of 310μs for FILTERL=0
and 175μs for FILTERL=1 shall be considered.
SCLK shall be low during that transparent
mode. The transparent READ_TAG mode is
terminated by a low to high transition of SCLK.