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Problem with HTRC110 - HiTagS communication

Question asked by Shubham Saxena on May 1, 2017

hi all,

I am trying to communicate with HiTagS 256 via HTRC110.

As per the datasheet we need to:

=> Configure HTRC110

=> Set WRITE_TAG_N to required write pulse width (currently am using transparent mode)

=> Read phase, calculate sampling time and set the same.( For our antenna phase value comes around  0xf and compensation offset value I have set to 0x3F)

=> Fast settling, freeze the filters and switch HTRC110 to write mode

=> Then I am sending UID Request to HiTagS and switch HTRC110 to read mode.

=> After switching to read mode am getting noise from the antenna and UNABLE TO RECEIVE RESPONSE FROM TAG.

=> I checked the modulation on TX1 and TX 2 of HTRC110 and can see variation in it as shown in MOD_IMAGE below.

Modulation observed on HTRC110 TX side

NOTE: Please ignore the labels.

=> UID Request waveform are attached as zip file.

Please let us know if any further inputs are required.

 

Also, We are getting center frequency of 125KHz on antenna.

Original Attachment has been moved to: UID_Req_RW_Waveforms.zip

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