Im currently using the Adafruit PN532 NFC-Shield, from which I want to supply an NTAG I2C Antenna with power.
With the Vout of the NTAG I2C I want to power an MCU.
I want to generate an RF-Field to get 3,3V to the Vout Pin of the NTAG I2C to run my MCU.
I do not exactly how to get an RF-Field without sending Messages with the PN532.
I think I have to set the Tx2RFEn and TX1RFEn Bits of the CIU_TxControl Register (0x6304).
When I write an 0x83 into the Register 0x6304 then there is an RF-Field for a few Milliseconds.
If I read the Register 0x6304 after I have set the two Bits, then there is still the value "0x80" in the Register.