All HW peripherals can be used (if you do it properly) while BLE radio is operational (through SoftDevice or custom stack). So this part is safe, you can use BLE and NFC Tag (= ISO14443 Type A Card emulation) features in parallel. However (and you will get this answer in all instances of this question on this forum as well as nRF52 Product Specification so you probably already know it) nRF52 NFC HW block isn't able to feed 13.56MHz field so there is pretty no way how it would work as "NFC reader". Sure you can purchase discrete HW which does it and communicate with nRF52 over standard wired interface (I2C, SPI, UART/ISO7816...)
All HW peripherals can be used (if you do it properly) while BLE radio is operational (through SoftDevice or custom stack). So this part is safe, you can use BLE and NFC Tag (= ISO14443 Type A Card emulation) features in parallel. However (and you will get this answer in all instances of this question on this forum as well as nRF52 Product Specification so you probably already know it) nRF52 NFC HW block isn't able to feed 13.56MHz field so there is pretty no way how it would work as "NFC reader". Sure you can purchase discrete HW which does it and communicate with nRF52 over standard wired interface (I2C, SPI, UART/ISO7816...)
