VDD and VDD_TX connection in X-NUCLEO-NFC06A1 circuit schematic

[DSai.1]

Dear Sir,

In st25r3916 datasheet, VDD and VDD_TX is not connected togather.

But in X-NUCLEO-NFC06A1 circuit schematic, it seems that these two

pins are connected togather, but there is a X sign in schematic as shown

in attached figure.

could you like to confirm this connection for us?

VDD and VDD_TX should be connected or not for normal application?

best regards

Dai Sai

[Ulysses HERNIOSUS]

Hi Dai Sai,

not sure about the meaning of the X. But the chapter about "Power supply system" clearly tells "VDD and VDD_TX must be connected to the same power supply."

Best Regards, Ulysses

[DSai.1]

Dear Ulysses,

thank you very much for your reply.

I misread the figure 2 in datasheet of st25r3916.

It is good to confirm that VDD and VDD_TX is connected in our PCB.

best regards

Dai Sai​