Hello, we are developing an off-screen NFC, and we are currently experiencing some problems with the PCD Analog test: TA132's 4-plane test Fail
The contents of the FAIL are shown in the figure, and so far it has been verified as follows:
1. Extinguish the screen to test PASS
2. When lighting up the screen, the maximum output voltage of DPC needs to drop to 4.5V, TA132 4-plane test PASS, but TAB111 4-plane field voltage will Fail!
3. In the middle of the attempt to debug the ARC parameters, the test results did not significantly improve the effect, please ask whether there are other parameters can be optimized
4. Read 5190 documentation, mentioned SDT can solve this problem, please advise how to correctly debugging
We have tried debugging, with TypeA parameters loaded, no specific waveform information (GTK wave) in the captured log, using the recommended Signal Detection Threshold, no improvement
Hello @mark_tang
Please use EMVCo stack to test as the below:
Hello @mark_tang
Was the antenna under the screen when you tested it?
Yes, the antenna has three edges under the screen glass and one edge directly below the screen (the metal frame behind the screen has been removed), schematically as follows
