Hello, You are ok for the write steps.For the read steps, it doesn't work like that.The RF can't "request" a message by doing a read.The RF polls the HOST_PUT_MSG bit.The MCU writes a message into the mailbox. This sets HOST_PUT_MSG=1.Then, when dete...
Hello, There are two ways to detect messages: the MB_CTRL_Dyn register and the IT_STS_Dyn register. The IT_STS register informs the MCU of the nature of received interrupts. Each time the RF reader writes a message into the mailbox (and if the interr...
Hello, The calculation of the 4.8uH is described in the application note: La = 1/Cs*(2*pi*fcc)^2, with fcc as the resonant frequency (13.56MHz) and Cs the tuning capacitance (28.5pF for the ST25DV).For the energy harvesting, yes, it is better to matc...
Hello, If the antenna is 1.1uH then this is probably your problem.Each family of tag have different characteristic impedance, and each require a specific antenna tunned for this impedance. There is no "standard" NFC antenna.The ST25DV has a tuning ca...
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...
