Other Parts Discussed in Thread: RF37S114
Hello.
I use the TRF7962A to read the UID of the IC tag [RF37S114].
I occasionally can not read the UID properly.
For example, if reading fails, it will be as follows.
Successful example: 4E 58 A1 66 E7 C0 07 E0
Failure example: 4E 58 A1 66 E7 C0 07 52
E0 changes to 52.
If it fails, it always changes to the same number.
When changing to another IC tag, it will change to another number.
Example: E0 -> C1
The probability of failing is about 4%.
I know that communication distance affects reading. However, even if communicating at a distance of 0 mm, the result will not change. (In my environment, IC tags can communicate at a distance of 9 mm.)
I use this function to communicate.
Serial Interface Mode With Slave Select (SS)
I saw errata and I got the SPI data on the negative edge. I analyzed the SPI signal by another method, but I got the failed data.
Please tell me what I should be careful in order to get the data correctly.
