htrc110 library
Do you have HTRC110 data sheets? The data sheet explain all about you questions.
Click these links to download data sheets:
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:arrow:**broken link removed**
The communication between the HTRC110 and the microcontroller is done via a three wire digital interface. The interface is operated by the following signals:
SCLK Clock
DIN Data Input
DOUT Data Output
This is not a standard serial interface, I think you have to use standard micro controller I/O pins and write you own code to simulate SCLK, DIN and DOUT
Check NXP Application Note Library, maybe they has that routine already