Hello, Yes, that's right.For optimal performance, I also recommend tuning the resonant frequency a little above 13.56MHz (13.7Mhz is a good value).I also recommend to you to measure the resonant frequency after you add the parallel capacitor to ensur...
Hello, The only conditions to being able to write MB_CTRL=0x01 are: MB_MODE=1 and VCC present.As soon as VCC disappears or MB_MODE is set to 0, MB_CTRL is reset.May be you can check that VCC is always present?Best regards.
Hello, You can read this application note: https://www.st.com/resource/en/application_note/an2972-how-to-design-an-antenna-for-dynamic-nfc-tags-stmicroelectronics.pdfIf you do the math as explained in this application note, you can see that you need ...
Hello, "If there is no supply to the VCC of the tag IC, can RF communication be performed with the reader IC?"Yes absolutely. In that case, the ST25DV is entirely power by the RF field and all RF communication are working. Only the I2C bus is not fun...
Hello, The intent of the LPD pin is to reduce power consumption on the VCC when the device is not intended to communicate through I2C.When LPD is high, it is not possible to communicate though I2C anymore. This is the only restriction. The GPO output...
