kevins963
Newbie level 4
![Newbie level 4](/styles/images/ranks/blevel1.gif)
I am using the HTRC110 RFID Reader Chip by NXP and trying to read a HiTAG transponder with it: NXP Semiconductors[pip=037031]|pp=[t=pip,i=037031]
I am having trouble reading the transponder with the module.
I first start by setting initializing and setting the registers on the HTRC110 (Config pages, Read Phase Shift, Set Sampling Rate). Once set I initialize the READ_MODE (3 high bits followed by a low clk state).
Once in the READ_MODE the DOUT pins changes as it is suppose to but it is here that I am having the trouble. What rate am I suppose to sample DOUT to read the pins correctly. The 125KHZ is about 8 us, however I believe each high/low needs to be between 8-10 cycles or 64 - 80 us in width.
If someone can give me reference to a similar project, documentation or provide some information on how to accurately read the transponder once in READ_MODE with the HTRC110 I would really appreciate it.
I have also already read the manchester biphase encoding standard but do not see any of those pattern in my input.
Thanks for any help
I am having trouble reading the transponder with the module.
I first start by setting initializing and setting the registers on the HTRC110 (Config pages, Read Phase Shift, Set Sampling Rate). Once set I initialize the READ_MODE (3 high bits followed by a low clk state).
Once in the READ_MODE the DOUT pins changes as it is suppose to but it is here that I am having the trouble. What rate am I suppose to sample DOUT to read the pins correctly. The 125KHZ is about 8 us, however I believe each high/low needs to be between 8-10 cycles or 64 - 80 us in width.
If someone can give me reference to a similar project, documentation or provide some information on how to accurately read the transponder once in READ_MODE with the HTRC110 I would really appreciate it.
I have also already read the manchester biphase encoding standard but do not see any of those pattern in my input.
Thanks for any help