2255999_en-US

[#1]

Using NRF52840 chip to connect to PN5190 module, unable to turn on the RF function, resulting in failure to find the card

We recently used the NRF52840 MCU to connect to the PN5190 module via the SPI interface, and the SDK we used, NxpNfcRdLib_PN5190_v07.14.00_pub, was unable to turn on the RF, which resulted in a failure to seek the card

1. We use NRF52840 to connect to the PNEV5190BP V1.0 official development board to find the card normally.
2. We use NRF52840 MCU to connect the module of PN5190, the peripheral circuit of PN5190 is designed with reference to EVM boards
3. However, hardware engineers tested and found that the antenna impedance values did not match up

Attached is the log, in the log I found that the initialization of the PN5190 all passed, and also can read the version number of the PN5190 normally, but when sending the turn on RF command (7F 10 00 01 00), the PN5190 does not have the IRQ level, so I want to ask

1. If the antenna impedance is mismatched then the PN5190 won't respond by sending an open RF command?
2. If the PN5190 module receives the command to open the RF, it should first reply to the response (send IRQ signal), or open the RF, if the RF is opened successfully, before replying to the response (send IRQ signal).